Enterprise

Redis Monitoring(mon.sh)

redisGate Enterprise Server에서는 레디스 서버 모니터링을 위해서 mon.sh를 제공합니다.
ent-7.4.6, ent-7.4.8 버전의 mon.sh와 이후 개선된 (ent-7.5.0 or ent-8.0.0) mon.sh를 소개합니다.

ent-8.0.3

1. mon.sh

------------------------------------------------------------------------------------------------------------------------------ Server(8.0.3): 127.0.0.1:18504,sync_port:28504. pid: 2679. uptime: 45 sec. CPU E3-1230 v6 @ 3.50GHz 8 Cores | CentOS Linux 7 (Core) | Dell Inc. PowerEdge R230 Mem: 7.75G, used: 2.80G, free: 1.05G, shared: 134M, buff/cache: 3.90G, avail: 5.54G| Swap: 8.00G, used: 3.25G, free: 4.75G Disk Redis home:/ size:230G, used:88.3G, avail:142G, used%:38%. data:/data size:931G, used:367G, avail:564G, used%:39% ------------------------------------------------------------------------------------------------------------------------------ time keys cpu mem rss swap clients commands input output send recv child cpu rss write ------------------------------------------------------------------------------------------------------------------------------ 15:12:35 0 0.2% 1M 5M(0%) 0B(0%) 1 2(0%) 52B 8K 0B 0B N/A 15:12:36 0 0.2% 1M 5M(0%) 0B(0%) 1 3(0%) 87B 2K 0B 0B N/A 15:12:37 0 0.3% 1M 5M(0%) 0B(0%) 1 3(0%) 75B 10K 0B 0B N/A 15:12:38 0 0.2% 1M 5M(0%) 0B(0%) 1 1(0%) 23B 2K 0B 0B N/A 15:12:39 0 0.3% 1M 5M(0%) 0B(0%) 1 3(0%) 75B 10K 0B 0B N/A 15:12:40 0 0.2% 1M 5M(0%) 0B(0%) 1 1(0%) 23B 2K 0B 0B N/A

헤더 정보

레디스 서버 버전 정보: Server(8.0.3)
IP:port, sync_port 정보: 127.0.0.1:18504,sync_port:28504
process id: pid: 2679
시작 시간: uptime: 45 sec
CPU 정보: CPU E3-1230 v6 @ 3.50GHz 8 Cores
OS 정보: CentOS Linux 7 (Core)
H/W 모델 정보: Dell Inc. PowerEdge R230
메모리 정보: Mem: 7.75G, used: 2.80G, free: 1.05G, shared: 134M, buff/cache: 3.90G, avail: 5.54G
Swap 정보: Swap: 8.00G, used: 3.25G, free: 4.75G
Disk Redis home:/ size:230G, used:88.3G, avail:142G, used%:38%.
data:/data size:931G, used:367G, avail:564G, used%:39%

데이터

time: 15:12:35
keys: 0
cpu: 0.2%
mem(used memory): 1M
rss(rss memory): 5M(0%)
swap: 0B(0%) -> 메모리를 다 사용하면 swap 영역을 사용한다.
clients: 1 -> 접속한 클라이언트 수
commands: 2(0%) -> 초당 실행한 명령 수, 퍼센트는 redis.conf "benchmark-commands 100000"를 기준으로 한다.
input: 52B -> 일반 클라이언트로 부터 받은 명령(바이트)
output: 8K -> 일반 클라이언트로 리턴한 결과(바이트)
send: 0B -> 동기화중인 서버에 보낸 데이터(바이트)
recv: 0B -> 동기화중인 서버로 부터 받은 데이터(바이트)
child: N/A -> AOF Rewrite, 전체동기화일 경우
cpu: child process CPU 사용율
rss: child process rss 메모리 사용량
write: child process write 바이트(초)

ent-7.4.6

1. Disk to Disk

• repl-diskless-sync no
• repl-diskless-load disabled

• 1번 서버 mon.sh: RDB 생성, 파일 전송(SEND) 상태는 표시되지 않습니다.
----------------------------------------------------------------------------------- time ip:port keys cpu memory clients commands from to child ----------------------------------------------------------------------------------- 16:20:59 18:18504 423813 142% 293.1M 1 0 0 0 LOAD(41%)-> AOF 로딩(시작 시) 16:21:00 18:18504 652579 100% 452.9M 1 1 0 0 LOAD(64%) 16:21:01 18:18504 903550 100% 611.2M 1 1 0 0 LOAD(90%) 16:21:02 18:18504 994997 36.9% 670.3M 1 1 0 0 16:21:03 18:18504 994997 0.1% 670.3M 1 1 0 0 16:21:12 18:18504 994997 0.1% 686.3M 2 1 0 1 ->2번 서버 시작했음. 16:21:13 18:18504 994997 0.1% 686.3M 2 1 0 1 16:21:14 18:18504 994997 0.1% 686.3M 2 1 0 1 RDB->동기화용 파일 생성 16:21:15 18:18504 994997 26.9% 686.3M 2 1 0 1 RDB 16:21:16 18:18504 994997 25.8% 686.3M 2 1 0 1 -> 보내는 중(SEND) 표시되지 않음 16:21:17 18:18504 994997 3.8% 686.3M 2 1 0 1 16:21:18 18:18504 994997 0.1% 686.3M 2 2 0 1

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD) ----------------------------------------------------------------------------------- time ip:port keys cpu memory clients commands from to child ----------------------------------------------------------------------------------- 16:21:11 18:18505 994997 0.1% 563.6M 1 1 0 0 16:21:12 18:18505 994997 0.1% 563.6M 1 1 0 0 16:21:13 18:18505 994997 0.1% 563.6M 1 1 0 0 16:21:14 18:18505 994997 12.2% 563.6M 1 1 0 0 16:21:15 18:18505 994997 34.5% 563.6M 1 1 0 0 -> 받는중(RECV) 표시되지 않음. 16:21:16 18:18505 3971 68.2% 11.2M 1 1 0 0 LOAD(0%)->받은 파일 로딩 16:21:17 18:18505 937367 100% 531.5M 1 2 0 0 LOAD(94%) 16:21:18 18:18505 994997 13.6% 579.6M 2 1 1 0 AOF->로딩 완료 후 AOF 생성 16:21:19 18:18505 994997 0.1% 579.6M 2 1 1 0 AOF 16:21:20 18:18505 994997 0.1% 579.6M 2 1 1 0 AOF 16:21:21 18:18505 994997 0.1% 579.6M 2 1 1 0 AOF 16:21:22 18:18505 994997 0.1% 579.6M 3 7 1 1 16:21:23 18:18505 994997 9.4% 579.6M 3 2 1 1

• from, to 항목: 동기화 서버와 연결이 끊기면 '0'을 표시하고, 연결되면 '1'을 표시합니다.
• SEND, RECV는 표시되지 않습니다. ent748부터는 표시됩니다.

ent-7.4.8

1. Disk to Disk

• repl-diskless-sync no
• repl-diskless-load disabled

• 1번 서버
<br> • 2번 서버 <textarea class="text" ------------------------- time ip:port role ------------------------- 01:50:37 18:18505 master 01:50:38 18:18505 master 01:50:39 18:18505 master 01:50:40 18:18505 master 01:50:41 18:18505 master 01:50:42 18:18505 master 01:50:43 18:18505 master 01:50:44 18:18505 master 01:50:45 18:18505 master 01:50:46 18:18505 master 01:50:47 18:18505 master mon.sh: RDB 생성과 생성된 RDB 파일 전송(SEND) cols="98" rows="20" readonly wrap="off" style="font-family: monospace;"> ---------------------------------------------------------------- keys cpu memory clients commands from to child ---------------------------------------------------------------- 995078 0.1% 1.1G 1 1 0 0 995078 1.7% 1.1G 2 6 0 1 RDB(0%) 995078 0.1% 1.1G 2 1 0 1 RDB(13%) 995078 0.1% 1.1G 2 1 0 1 RDB(26%) 995078 0.1% 1.1G 2 1 0 1 RDB(26%) 995078 0.1% 1.1G 2 1 0 1 RDB(39%) 995078 0.1% 1.1G 2 1 0 1 RDB(52%) 995078 0.1% 1.1G 2 1 0 1 RDB(65%) 995078 0.1% 1.1G 2 1 0 1 RDB(78%) 995078 0.1% 1.1G 2 1 0 1 SEND(0%) 995078 27.7% 1.1G 2 1 0 1 SEND(42%) 995078 22.3% 1.1G 2 1 0 1 SEND(75%) 995078 32.8% 1.1G 2 1 0 1 995078 0.2% 1.1G 2 1 0 1 995078 0.1% 1.1G 2 2 0 1 995078 0.1% 1.1G 2 2 1 1 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD) cols="98" rows="15" readonly wrap="off" style="font-family: monospace;"> ---------------------------------------------------------------- keys cpu memory clients commands from to child ---------------------------------------------------------------- 0 0.1% 996.6K 1 1 0 0 0 0.1% 996.6K 1 1 0 0 0 0.1% 996.6K 1 1 0 0 0 0.1% 996.6K 1 1 0 0 0 40.2% 996.6K 1 1 0 0 RECV(0%) 0 40.2% 996.6K 1 1 0 0 RECV(41%) 2039 39.8% 11.1M 1 1 0 0 LOAD(0%) 518167 100% 550.6M 1 2 0 0 LOAD(52%) 995078 100% 1.0G 2 3 1 0 995078 112% 1.0G 2 1 1 0 995078 0.1% 1.0G 2 1 1 1

• from, to 항목: 동기화 서버와 연결이 끊기면 '0'을 표시하고, 연결되면 '1'을 표시합니다.
• SEND, RECV가 표시되고, 진행률(%)도 표시됩니다.

ent-7.5.0, ent-8.0.0

이전 버전과 차이(개선)점

반복되는 date, role을 제거했고, ip:port는 header로 옮겼습니다. header에 서버 메모리와 스왑을 표시했습니다.
클라이언트로부터 받은 데이터량(input), 클라이언트로 내보낸 데이터량(oupput) 항목을 추가했고, from, to 항목은 동기화 서버 연결 여부(1/0)에서 동기화 서버와 주고 받는 데이터량(바이트)를 표시하는 것으로 변경했습니다.
rss, swap을 추가했고, child의 cpu와 rss를 추가했습니다.
이전 버전은 'Disk to Disk' 동기화 방식만 지원했지만, ent750부터는 'Memory to Memroy' 방식을 지원하고, 이 방식을 기본(default)로 합니다.

1. Disk to Disk

• repl-diskless-sync no
• repl-diskless-load disabled

• 1번 서버 mon.sh: RDB 생성과 생성된 RDB 파일 전송(SEND)
-------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.54G, free: 148M, shared: 5M, buff/cache: 4.07G, avail: 4.04G Swap: 8.00G, used: 3.29G, free: 4.71G. IP:Port 127.0.0.1:18504. Pid: 25165 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:02:46 1980118 3.5% 3.00G 3.02G(38%) 0B(0%) 2 6 387B 299B 0B 0B RDB(0%) 37% 3.02G 01:02:47 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(4%) 59% 3.02G 01:02:48 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(8%) 63% 3.02G 01:02:49 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(13%) 66% 3.02G 01:02:50 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(17%) 62% 3.02G 01:02:51 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(22%) 60% 3.02G 01:02:52 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(26%) 59% 3.02G 01:02:53 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(31%) 61% 3.02G 01:02:54 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(35%) 63% 3.02G 01:02:55 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(40%) 64% 3.02G 01:02:56 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(44%) 61% 3.02G 01:02:57 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(48%) 60% 3.02G 01:02:58 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(48%) 61% 3.02G 01:02:59 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(53%) 61% 3.02G 01:03:00 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(57%) 65% 3.02G 01:03:01 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(62%) 63% 3.02G 01:03:02 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(66%) 59% 3.02G 01:03:03 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(71%) 59% 3.02G 01:03:04 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(75%) 62% 3.02G 01:03:05 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(80%) 66% 3.02G 01:03:06 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(84%) 61% 3.02G 01:03:07 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(88%) 59% 3.02G 01:03:08 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(93%) 61% 3.02G 01:03:09 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(97%) 65% 3.02G 01:03:10 1980118 22.4% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 312M SEND(8%) 01:03:11 1980118 25.0% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 320M SEND(20%) 01:03:12 1980118 23.2% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 316M SEND(30%) 01:03:13 1980118 21.7% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 308M SEND(44%) 01:03:14 1980118 24.8% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 332M SEND(55%) 01:03:15 1980118 22.9% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 316M SEND(62%) 01:03:16 1980118 22.9% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 316M SEND(75%) 01:03:17 1980118 27.0% 3.00G 3.02G(38%) 0B(0%) 2 1 46B 500B 0B 360M SEND(86%) 01:03:19 1980118 24.7% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 250B 0B 328M 01:03:20 1980118 48.9% 3.00G 3.02G(38%) 0B(0%) 2 1 25B 246B 0B 288M 01:03:21 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 24B 246B 0B 0B

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD) -------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.57G, free: 141M, shared: 5M, buff/cache: 4.05G, avail: 4.03G Swap: 8.00G, used: 3.29G, free: 4.71G. IP:Port 127.0.0.1:18505. Pid: 25193 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:03:09 0 0.1% 997K 3M(0%) 0B(0%) 1 1 23B 241B 1B 0B 01:03:10 0 7.5% 997K 3M(0%) 0B(0%) 1 1 23B 241B 74M 0B RECV(5%) 01:03:11 0 46.5% 997K 3M(0%) 0B(0%) 1 1 23B 245B 358M 0B RECV(15%) 01:03:12 0 46.2% 997K 3M(0%) 0B(0%) 1 1 23B 246B 325M 0B RECV(26%) 01:03:13 0 43.6% 997K 3M(0%) 0B(0%) 1 1 23B 246B 347M 0B RECV(37%) 01:03:14 0 45.9% 997K 3M(0%) 0B(0%) 1 1 23B 246B 327M 0B RECV(51%) 01:03:15 0 33.0% 997K 3M(0%) 0B(0%) 1 1 23B 246B 241M 0B RECV(57%) 01:03:16 0 47.4% 997K 3M(0%) 0B(0%) 1 1 23B 246B 400M 0B RECV(69%) 01:03:17 0 46.8% 997K 3M(0%) 0B(0%) 1 1 23B 246B 329M 0B RECV(80%) 01:03:18 0 46.8% 997K 3M(0%) 0B(0%) 1 1 23B 246B 329M 0B RECV(91%) 01:03:19 92357 44.6% 158M 162M(2%) 0B(0%) 1 1 23B 0B 144M 0B LOAD(4%) 01:03:20 451222 93.7% 709M 720M(9%) 0B(0%) 1 2 117B 314B 0B 0B LOAD(22%) 01:03:21 846046 97.1% 1.28G 1.30G(16%) 0B(0%) 1 1 23B 248B 0B 0B LOAD(42%) 01:03:22 1200902 95.5% 1.81G 1.84G(23%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(60%) 01:03:23 1547435 95.2% 2.33G 2.36G(30%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(78%) 01:03:24 1898691 97.0% 2.86G 2.90G(37%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(95%) 01:03:25 1980118 97.0% 3.00G 3.02G(38%) 0B(0%) 2 5 23B 250B 0B 0B AOF(0%) 0% 3.02G 01:03:26 1980118 26.0% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 504B 56B 0B AOF(0%) 60% 3.02G 01:03:27 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 6 23B 290B 0B 0B AOF(4%) 59% 3.02G 01:03:28 1980118 0.2% 3.00G 3.02G(38%) 0B(0%) 3 2 387B 343B 0B 0B AOF(8%) 62% 3.02G

항목 설명

Mem: 메모리 사용량을 나타낸다. top 명령의 내용과 같습니다.
Swap: 스왑영역 사용량을 나타낸다. top 명령의 내용과 같습니다.
IP:Port: 레디스 서버의 IP와 port를 나타냅니다. mon.sh 화면을 여러 개 띄웠을 때 'IP:Port'로 레디스 서버를 구분합니다.
Pid: 레디스 서버의 'process id'. top 명령 또는 레디스 로그를 같이 볼 때 pid로 서버를 확인합니다.
time: 시각(시:분:초) 표시
keys: 키 개수
cpu: 레디스 서버가 사용하는 CPU 사용률
mem: 레디스 서버가 요청한 메모리 량
rss(Resident Set Size): OS가 할당한 메모리 량
mem과 rss의 메모리 사용량은 다를 수 있습니다.
Case1: 레디스 서버가 100바이트를 요청하면 OS는 1page(4KB)를 할당합니다. 이런 경우 rss가 큽니다.
Case2: 레디스 서버가 버퍼용으로 100MB를 요청하면 OS는 우선 10MB를 할당하고 나머지는 가상영역에 할당합니다. 이런 경우 mem이 급니다.
swap: 스왑 사용량. 레디스 서버가 스왑을 사용하는 경우.
Case1: 메모리가 모자랄 경우 스왑을 사용합니다. 이것은 Linux OS 'swappiness'와 관계있습니다.
Case2: Avail 메모리가 충분하더라도 레디스 서버의 키(데이터키) 중 오랜동안 사용(참조)하지 않는 키가 있으면 해당 데이터를 스왑영역으로 옮기고 메모리를 확보합니다. 사용 가능한(avail) 메모리가 충분한데도 레디스 서버가 스왑영역을 사용하는 이유입니다.
clients: 현재 레디스 서버에 접속해있는 클라이언트 수
commands: 초당 명령 실행 수
input: 클라이언트로부터 받은 명령(데이터 량): 바이트(B/K/M/G로 표시)
output: 결과를 클라이언트로 보내는 데이터 량: 바이트(B/K/M/G로 표시)
from: 동기화 서버로 부터 받은 데이터 량: 바이트(B/K/M/G로 표시)
to: 동기화 서버로 보내는 데이터 량: 바이트(B/K/M/G로 표시)
child: 자식 프로세스 실행 시 표시: RDB/AOF.
SEND/RECV/LOAD" 이것은 메인 프로세스가 실행한다. 원래는 이 항목이 자식 프로세스를 표시했는데, SEND/RECV/LOAD를 추가하면서 메인(부모) 프로세스의 작업도 표시하게 되었습니다.
동기화 전달 방식이 Memory(socket)일 경우 'SEND'는 RDB(child) + SEND(parent) 입니다.
cpu: 자식 프로세스 CPU 사용률
rss: 자식 프로세스 메모리(rss) 사용량

• 1번 서버 RDB 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 25165 25165 5 12.8 38.9 3549724 3168376 ../src/redis-eserver 127.0.0.1:18504 redis 25198 25198 1 60.2 38.9 3549864 3167524 redis-rdb-bgsave 127.0.0.1:18504

• 1번 서버 LOG
25165:M 01:02:45.665415 # Starting BGSAVE for SYNC with target: disk 25165:M 01:02:45.698801 # Background saving started by pid 25198 25165:M 01:02:45.698872 # Master: Send +FULLRESYNC fb00fc488d17cff018f60122fd7aad12ad0f65f3 0 25198:C 01:02:45.699015 # Start saving rdb file 25198:C 01:02:45.699230 # db0 keys: 1980118, expire keys: 0 25198:C 01:03:09.463185 # DB saved on disk 25198:C 01:03:09.488276 # RDB: 0 MB of memory used by copy-on-write 25165:M 01:03:09.555747 # Background saving terminated with success. 24 sec 25165:M 01:03:09.555801 # Start Sending Data 3019719593 bytes to 127.0.0.1:18505 25165:M 01:03:18.527545 # Finished Sending Data. 9 sec 25165:M 01:03:19.028123 # Clone 127.0.0.1:18505 ONLINE. 25165:M 01:03:28.153348 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
25193:M 01:02:45.698994 # Received +FULLRESYNC from 127.0.0.1:18504, receiving=1 25193:M 01:02:45.699042 # Full resync from master: fb00fc488d17cff018f60122fd7aad12ad0f65f3:0 25193:M 01:02:45.699055 # Wait to receive(Master is saving a rdb file) 25193:M 01:02:45.699096 # Open the temp file ./data/temp-1744560165.25193.rdb fd:11 25193:M 01:03:09.555904 # Start Receiving FullSync Data 3019719593 bytes from master to disk, receiving=2 25193:M 01:03:18.588672 # Finished Receiving Data 3019719593 bytes. 9 sec, receiving=1 25193:M 01:03:18.666979 # MASTER <-> CLONE sync: Flushing old data 25193:M 01:03:18.740761 # MASTER <-> CLONE sync: Loading DB in memory 25193:M 01:03:18.821721 # Delete all data in memory 25193:M 01:03:18.821789 # Start Uploading Data in Memory. receiving=0 25193:M 01:03:18.821821 # startLoading loading_end_time:0 25193:M 01:03:18.823265 # Loading RDB produced by version 7.5.0 25193:M 01:03:18.823308 # RDB age 33 seconds 25193:M 01:03:18.823357 # RDB memory usage when created 3070.20 Mb 25193:M 01:03:18.823374 # db0 keys: 1980118, expire keys: 0 25193:M 01:03:24.342107 # Done loading RDB, keys loaded: 1980118, keys expired: 0. 25193:M 01:03:24.342192 # stopLoading loading_end_time:1744560204 25193:M 01:03:24.342238 # Create Clone Backlog: 16777216 25193:M 01:03:24.342251 # Finished Uploading Data in Memory. keys:1980118, 6 sec, receiving=0 25193:M 01:03:24.342262 # MASTER -> CLONE Synchronization Successful. 25193:M 01:03:27.153254 # Clone 127.0.0.1:18504 ONLINE. 25193:M 01:03:27.287968 # cloneCron: sync_clone_flag: 0 25193:M 01:03:48.454637 # Background AOF rewrite finished successfully. 24 sec

2. Memory to Disk

• repl-diskless-sync yes
• repl-diskless-load disabled

• 1번 서버 mon.sh: 메모리의 데이터를 바로 2번 서버로 전송(SEND)
-------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.43G, free: 1.47G, shared: 5M, buff/cache: 2.85G, avail: 4.13G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18504. Pid: 25863 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:16:24 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 245B 0B 0B 01:16:25 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 245B 0B 0B SEND(118M) 0% 3.02G 01:16:26 1980118 26.7% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 255B 0B 242M SEND(375M) 96% 3.02G 01:16:27 1980118 24.5% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 256B 0B 260M SEND(634M)100% 3.02G 01:16:28 1980118 23.4% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 256B 0B 261M SEND(891M) 99% 3.02G 01:16:29 1980118 24.4% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 256B 0B 256M SEND(1.12G)100% 3.02G 01:16:30 1980118 24.9% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 263M SEND(1.38G)100% 3.02G 01:16:31 1980118 27.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 265M SEND(1.64G)101% 3.02G 01:16:32 1980118 27.0% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 260M SEND(1.90G) 99% 3.02G 01:16:33 1980118 26.6% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 265M SEND(2.15G)100% 3.02G 01:16:34 1980118 25.0% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 262M SEND(2.40G)100% 3.02G 01:16:35 1980118 24.9% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 259M SEND(2.66G) 99% 3.02G 01:16:36 1980118 25.4% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 257B 0B 265M 01:16:37 1980118 2.2% 3.00G 3.02G(38%) 0B(0%) 2 1 25B 246B 0B 23M

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD)
-------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.43G, free: 1.47G, shared: 5M, buff/cache: 2.85G, avail: 4.14G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18505. Pid: 25887 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:16:23 0 0.1% 997K 3M(0%) 0B(0%) 1 1 23B 241B 0B 0B 01:16:24 0 4.9% 997K 3M(0%) 0B(0%) 1 1 23B 241B 39M 0B RECV(74M) 01:16:25 0 31.5% 997K 3M(0%) 0B(0%) 1 1 23B 245B 256M 0B RECV(329M) 01:16:26 0 31.5% 997K 3M(0%) 0B(0%) 1 1 23B 247B 260M 0B RECV(584M) 01:16:27 0 32.1% 997K 3M(0%) 0B(0%) 1 1 23B 247B 258M 0B RECV(830M) 01:16:28 0 31.8% 997K 3M(0%) 0B(0%) 1 1 23B 247B 261M 0B RECV(1.05G) 01:16:29 0 34.7% 997K 3M(0%) 0B(0%) 1 1 23B 248B 268M 0B RECV(1.30G) 01:16:30 0 34.7% 997K 3M(0%) 0B(0%) 1 1 23B 248B 259M 0B RECV(1.55G) 01:16:31 0 35.2% 997K 3M(0%) 0B(0%) 1 1 23B 248B 266M 0B RECV(1.88G) 01:16:32 0 35.2% 997K 3M(0%) 0B(0%) 1 1 23B 248B 263M 0B RECV(2.13G) 01:16:33 0 31.5% 997K 3M(0%) 0B(0%) 1 1 23B 248B 259M 0B RECV(2.37G) 01:16:34 0 34.4% 997K 3M(0%) 0B(0%) 1 1 23B 248B 266M 0B RECV(2.62G) 01:16:35 148380 61.9% 245M 250M(3%) 0B(0%) 1 1 46B 248B 224M 0B LOAD(7%) 01:16:36 579025 100% 907M 920M(11%) 0B(0%) 1 2 117B 314B 0B 0B LOAD(29%) 01:16:38 885398 77.6% 1.34G 1.36G(17%) 0B(0%) 1 1 23B 247B 0B 0B LOAD(44%) 01:16:39 1021490 47.4% 1.55G 1.57G(20%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(51%) 01:16:40 1153540 47.7% 1.74G 1.77G(22%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(58%) 01:16:41 1290907 49.4% 1.95G 1.98G(25%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(65%) 01:16:42 1420068 52.3% 2.14G 2.17G(28%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(71%) 01:16:43 1609009 60.5% 2.43G 2.46G(31%) 0B(0%) 1 2 117B 316B 0B 0B LOAD(81%) 01:16:44 1949863 94.0% 2.94G 2.98G(38%) 0B(0%) 1 1 23B 250B 0B 0B LOAD(98%) 01:16:45 1980118 11.6% 3.00G 3.02G(38%) 0B(0%) 2 3 0B 285B 28B 0B AOF(0%) 39% 3.02G 01:16:46 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 1 23B 290B 0B 0B AOF(4%) 60% 3.02G 01:16:47 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 2 2 23B 289B 14B 0B AOF(8%) 63% 3.02G

• 1번 서버 RDB 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 25863 25863 5 22.2 38.9 3535388 3168412 ../src/redis-eserver 127.0.0.1:18504 redis 25898 25898 1 93.6 38.9 3535524 3167572 redis-rdb-to-clones 127.0.0.1:18504

• 1번 서버 LOG
25863:M 01:16:24.496391 # Starting BGSAVE for SYNC with target: clones sockets 25863:M 01:16:24.496481 # Master: Send +FULLRESYNC 39e17880a2d0dec4a7975440780c6d2e24546681 0 25863:M 01:16:24.526291 # Background RDB transfer started by pid 25898 25898:C 01:16:24.526455 # Start saving rdb file 25898:C 01:16:24.526602 # db0 keys: 1980118, expire keys: 0 25898:C 01:16:35.646388 # RDB: 0 MB of memory used by copy-on-write 25863:M 01:16:35.646451 # rdbPipeReadHandler(): Diskless rdb transfer, done reading from pipe, 1 replicas still up. 25863:M 01:16:35.739200 # Background RDB transfer terminated with success 25863:M 01:16:35.739262 # Streamed RDB transfer with clone 127.0.0.1:18505 succeeded (socket). Waiting for CLONECONF ACK from clone to enable streaming 25863:M 01:16:44.152497 # Clone 127.0.0.1:18505 ONLINE. 25863:M 01:16:49.575964 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
25887:M 01:16:24.496615 # Received +FULLRESYNC from 127.0.0.1:18504, receiving=1 25887:M 01:16:24.496689 # Full resync from master: 39e17880a2d0dec4a7975440780c6d2e24546681:0 25887:M 01:16:24.496735 # Wait to receive(Master is saving a rdb file) 25887:M 01:16:24.496808 # Open the temp file ./data/temp-1744560984.25887.rdb fd:12 25887:M 01:16:24.552399 # Receiving streamed RDB from master with EOF to disk 25887:M 01:16:35.624066 # Received successfully. Read bytes:3019719633(2.81G), Read cnt:9540 25887:M 01:16:35.642750 # MASTER <-> CLONE sync: Flushing old data 25887:M 01:16:35.643381 # MASTER <-> CLONE sync: Loading DB in memory 25887:M 01:16:35.643612 # Delete all data in memory 25887:M 01:16:35.643643 # Start Uploading Data in Memory. receiving=0 25887:M 01:16:35.643662 # startLoading loading_end_time:0 25887:M 01:16:35.643691 # Loading RDB produced by version 7.5.0 25887:M 01:16:35.643752 # RDB age 11 seconds 25887:M 01:16:35.643785 # RDB memory usage when created 3070.16 Mb 25887:M 01:16:35.643800 # db0 keys: 1980118, expire keys: 0 25887:M 01:16:44.113560 # Done loading RDB, keys loaded: 1980118, keys expired: 0. 25887:M 01:16:44.113624 # stopLoading loading_end_time:1744561004 25887:M 01:16:44.114171 # Create Clone Backlog: 16777216 25887:M 01:16:44.114188 # Finished Uploading Data in Memory. keys:1980118, 9 sec, receiving=0 25887:M 01:16:44.114214 # MASTER -> CLONE Synchronization Successful. 25887:M 01:16:44.148848 # Background append only file rewriting started by pid 25917 25917:C 01:16:44.152472 # db0 keys: 1980118, expire keys: 0 25887:M 01:16:48.669052 # Clone 127.0.0.1:18504 ONLINE. 25887:M 01:16:48.767350 # cloneCron: sync_clone_flag: 0 25887:M 01:17:08.021448 # Background AOF rewrite finished successfully. 24 sec

3. Memory to Memory: Socket

• repl-diskless-sync yes
• repl-diskless-load on-empty-db

• 1번 서버 mon.sh: 메모리의 데이터를 바로 2번 서버로 전송(SEND)
-------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.42G, free: 1.47G, shared: 5M, buff/cache: 2.86G, avail: 4.14G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18504. Pid: 26572 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:30:08 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 1 23B 245B 0B 0B 01:30:09 1980118 0.2% 3.00G 3.02G(38%) 0B(0%) 3 1 23B 245B 0B 0B SEND(124M) 0% 3.02G 01:30:10 1980118 25.0% 3.00G 3.02G(38%) 0B(0%) 3 1 25B 290B 0B 243M SEND(382M) 99% 3.02G 01:30:11 1980118 25.8% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 291B 0B 259M SEND(642M)100% 3.02G 01:30:12 1980118 26.0% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 291B 0B 260M SEND(895M)101% 3.02G 01:30:13 1980118 22.2% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 291B 0B 254M SEND(1.13G) 99% 3.02G 01:30:14 1980118 23.0% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 258M SEND(1.38G)100% 3.02G 01:30:15 1980118 24.2% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 257M SEND(1.62G)100% 3.02G 01:30:16 1980118 25.6% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 248M SEND(1.87G)101% 3.02G 01:30:17 1980118 26.1% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 251M SEND(2.12G)100% 3.02G 01:30:18 1980118 25.6% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 258M SEND(2.36G)100% 3.02G 01:30:19 1980118 25.6% 3.00G 3.02G(38%) 0B(0%) 3 1 24B 292B 0B 255M SEND(2.62G)100% 3.02G 01:30:20 1980118 27.7% 3.00G 3.02G(38%) 0B(0%) 3 3 24B 292B 0B 260M 01:30:21 1980118 8.0% 3.00G 3.02G(38%) 0B(0%) 3 2 94B 281B 0B 77M

• 2번 서버 mon.sh: 데이터 받는 동시에 메모리에 적용(RECV)
-------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.43G, free: 1.47G, shared: 5M, buff/cache: 2.86G, avail: 4.14G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18505. Pid: 26597 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:30:08 0 0.2% 17M 4M(0%) 0B(0%) 2 6 387B 295B 0B 0B 01:30:09 120559 34.9% 219M 207M(2%) 0B(0%) 2 2 81B 240B 176M 0B RECV(6%) 01:30:10 299205 49.8% 493M 485M(6%) 0B(0%) 2 2 58B 248B 260M 0B RECV(15%) 01:30:11 479273 52.2% 769M 765M(9%) 0B(0%) 2 2 58B 248B 262M 0B RECV(24%) 01:30:12 654158 47.3% 1.01G 1.01G(13%) 0B(0%) 2 2 58B 248B 254M 0B RECV(33%) 01:30:13 832928 49.0% 1.28G 1.28G(16%) 0B(0%) 2 2 58B 250B 260M 0B RECV(42%) 01:30:14 1008904 50.4% 1.54G 1.55G(19%) 0B(0%) 2 2 58B 250B 256M 0B RECV(50%) 01:30:15 1180783 51.9% 1.80G 1.81G(23%) 0B(0%) 2 2 58B 250B 250M 0B RECV(59%) 01:30:16 1353067 50.2% 2.06G 2.07G(26%) 0B(0%) 2 2 58B 250B 250M 0B RECV(68%) 01:30:17 1530039 53.0% 2.32G 2.34G(30%) 0B(0%) 2 2 58B 250B 258M 0B RECV(77%) 01:30:18 1705891 53.0% 2.59G 2.61G(33%) 0B(0%) 2 2 58B 250B 256M 0B RECV(86%) 01:30:19 1885233 55.7% 2.86G 2.88G(37%) 0B(0%) 2 2 58B 250B 260M 0B RECV(95%) 01:30:20 1980118 32.4% 3.00G 3.02G(38%) 0B(0%) 3 3 35B 285B 138M 0B AOF(0%) 9% 3.02G 01:30:21 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 2 58B 289B 14B 0B AOF(4%) 58% 3.02G 01:30:22 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 2 58B 289B 0B 0B AOF(4%) 60% 3.02G 01:30:23 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 2 58B 289B 0B 0B AOF(8%) 62% 3.02G ........ 01:30:42 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 2 59B 289B 0B 0B AOF(93%) 61% 3.02G 01:30:43 1980118 0.1% 3.00G 3.02G(38%) 0B(0%) 3 2 59B 289B 0B 0B

• 1번 서버 RDB 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 26572 26572 5 20.7 38.9 3535388 3168420 ../src/redis-eserver 127.0.0.1:18504 redis 26610 26610 1 96.4 38.9 3535520 3167572 redis-rdb-to-clones 127.0.0.1:18504

• 1번 서버 LOG
26572:M 01:30:08.783966 # Starting BGSAVE for SYNC with target: clones sockets 26572:M 01:30:08.784049 # Master: Send +FULLRESYNC 004ee364f0e4b3c25f077e2d37b0227ae1fe037f 14 26572:M 01:30:08.814215 # Background RDB transfer started by pid 26610 26572:M 01:30:08.814275 # cloneCron: sync_clone_flag: 0 26610:C 01:30:08.814396 # Start saving rdb file 26610:C 01:30:08.814548 # db0 keys: 1980118, expire keys: 0 26610:C 01:30:20.150144 # RDB: 0 MB of memory used by copy-on-write 26572:M 01:30:20.150235 # rdbPipeReadHandler(): Diskless rdb transfer, done reading from pipe, 1 replicas still up. 26572:M 01:30:20.226649 # Background RDB transfer terminated with success 26572:M 01:30:20.226727 # Streamed RDB transfer with clone 127.0.0.1:18505 succeeded (socket). Waiting for CLONECONF ACK from clone to enable streaming 26572:M 01:30:20.252815 # Clone 127.0.0.1:18505 ONLINE.

• 2번 서버 LOG
26597:M 01:30:08.784185 # Received +FULLRESYNC from 127.0.0.1:18504, receiving=1 26597:M 01:30:08.784239 # Full resync from master: 004ee364f0e4b3c25f077e2d37b0227ae1fe037f:14 26597:M 01:30:08.784266 # Wait to receive(Master is saving a rdb file) 26597:M 01:30:08.836722 # Receiving streamed RDB from master with EOF to parser 26597:M 01:30:08.836801 # MASTER <-> CLONE sync: Flushing old data 26597:M 01:30:08.836835 # MASTER <-> CLONE sync: Loading DB in memory 26597:M 01:30:08.836868 # startLoading loading_end_time:0 26597:M 01:30:08.836906 # Loading RDB produced by version 7.5.0 26597:M 01:30:08.836924 # RDB age 0 seconds 26597:M 01:30:08.836945 # RDB memory usage when created 3070.18 Mb 26597:M 01:30:08.836965 # db0 keys: 1980118, expire keys: 0 26597:M 01:30:20.124077 # Done loading RDB, keys loaded: 1980118, keys expired: 0. 26597:M 01:30:20.124120 # stopLoading loading_end_time:1744561820 26597:M 01:30:20.124180 # Finished Uploading Data in Memory. keys:1980118, 12 sec, receiving=0 26597:M 01:30:20.124200 # MASTER -> CLONE Synchronization Successful. 26597:M 01:30:20.152142 # Background append only file rewriting started by pid 26625 26625:C 01:30:20.152455 # db0 keys: 1980118, expire keys: 0 26597:M 01:30:20.252670 # cloneCron: sync_clone_flag: 0 26597:M 01:30:43.493210 # Background AOF rewrite finished successfully. 23 sec

4. BGREWRITEAOF

• mon.sh -------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.42G, free: 1.47G, shared: 5M, buff/cache: 2.86G, avail: 4.14G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18504. Pid: 27164 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:41:25 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 245B 0B 0B 01:41:26 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 2 23B 245B 0B 0B AOF(0%) 0% 3.02G 01:41:27 1980118 3.5% 2.98G 3.02G(38%) 0B(0%) 2 1 46B 301B 0B 0B AOF(0%) 49% 3.02G 01:41:28 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(4%) 47% 3.02G 01:41:29 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(8%) 63% 3.02G 01:41:30 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(12%) 64% 3.02G 01:41:31 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(16%) 62% 3.02G 01:41:32 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(21%) 59% 3.02G 01:41:33 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(25%) 61% 3.02G 01:41:34 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(30%) 63% 3.02G 01:41:35 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(34%) 65% 3.02G 01:41:36 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(38%) 60% 3.02G 01:41:37 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(43%) 57% 3.02G 01:41:38 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(47%) 59% 3.02G 01:41:39 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(52%) 66% 3.02G 01:41:40 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(56%) 57% 3.02G 01:41:41 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(61%) 60% 3.02G 01:41:42 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(61%) 61% 3.02G 01:41:43 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(65%) 65% 3.02G 01:41:44 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(70%) 50% 3.02G 01:41:45 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(74%) 63% 3.02G 01:41:46 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(78%) 62% 3.02G 01:41:47 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(83%) 60% 3.02G 01:41:48 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(87%) 59% 3.02G 01:41:49 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B AOF(92%) 62% 3.02G 01:41:50 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B

• AOF 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 27164 27164 7 0.9 38.9 3621412 3166648 ../src/redis-eserver 127.0.0.1:18504 redis 27197 27197 1 57.0 38.9 3621552 3166224 redis-aof-rewrite 127.0.0.1:18504

• LOG
27164:M 01:41:26.246908 # BGREWRITEAOF - 127.0.0.1:59010 27164:M 01:41:26.280558 # Background append only file rewriting started by pid 27197 27197:C 01:41:26.280893 # db0 keys: 1980118, expire keys: 0 27164:M 01:41:50.401877 # AOF rewrite child asks to stop sending diffs. 27197:C 01:41:50.402663 # Parent agreed to stop sending diffs. Finalizing AOF... 27197:C 01:41:50.402749 # Concatenating 0.00 MB of AOF diff received from parent. 27197:C 01:41:50.402875 # SYNC append only file rewrite performed 27197:C 01:41:50.439434 # AOF rewrite: 0 MB of memory used by copy-on-write 27164:M 01:41:50.570392 # Background AOF rewrite terminated with success 27164:M 01:41:50.570483 # Residual parent diff successfully flushed to the rewritten AOF (0.00 MB) 27164:M 01:41:50.570718 # Background AOF rewrite finished successfully. 24 sec

5. BGSAVE

• mon.sh -------------------------------------------------------------------------------------------------------------------- Mem: 7.76G, used: 3.49G, free: 1.41G, shared: 5M, buff/cache: 2.85G, avail: 4.11G Swap: 8.00G, used: 3.30G, free: 4.70G. IP:Port 127.0.0.1:18504. Pid: 27164 -------------------------------------------------------------------------------------------------------------------- time keys cpu mem rss swap clients commands input output from to child cpu rss -------------------------------------------------------------------------------------------------------------------- 01:43:34 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 245B 0B 0B 01:43:35 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 2 23B 245B 0B 0B RDB(0%) 0% 3.02G 01:43:36 1980118 3.5% 2.98G 3.02G(38%) 0B(0%) 2 1 39B 281B 0B 0B RDB(0%) 60% 3.02G 01:43:37 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(4%) 58% 3.02G 01:43:38 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(8%) 60% 3.02G 01:43:39 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(13%) 62% 3.02G 01:43:40 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(17%) 59% 3.02G 01:43:41 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(22%) 61% 3.02G 01:43:42 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(26%) 65% 3.02G 01:43:43 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(31%) 62% 3.02G 01:43:44 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(35%) 61% 3.02G 01:43:45 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(40%) 61% 3.02G 01:43:46 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(44%) 59% 3.02G 01:43:47 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(48%) 62% 3.02G 01:43:48 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(53%) 61% 3.02G 01:43:49 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(57%) 63% 3.02G 01:43:50 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(62%) 63% 3.02G 01:43:51 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(66%) 62% 3.02G 01:43:52 1980118 0.1% 2.98G 3.02G(38%) 0B(0%) 2 1 23B 253B 0B 0B RDB(71%) 58% 3.02G 01:43:53 1980118 0.1% 2.98G 3.02G(38%) 32K(0%) 2 1 23B 253B 0B 0B RDB(75%) 60% 3.02G 01:43:54 1980118 0.1% 2.98G 3.02G(38%) 112K(0%) 2 1 23B 254B 0B 0B RDB(80%) 60% 3.02G 01:43:55 1980118 0.1% 2.98G 3.02G(38%) 164K(0%) 2 1 23B 255B 0B 0B RDB(84%) 60% 3.02G 01:43:56 1980118 0.1% 2.98G 3.02G(38%) 192K(0%) 2 1 23B 255B 0B 0B RDB(88%) 62% 3.02G 01:43:57 1980118 0.1% 2.98G 3.02G(38%) 300K(0%) 2 1 23B 255B 0B 0B RDB(93%) 64% 3.02G 01:43:58 1980118 0.1% 2.98G 3.02G(38%) 408K(0%) 2 1 23B 255B 0B 0B

• RDB 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 27164 27164 7 0.9 38.9 3621412 3163776 ../src/redis-eserver 127.0.0.1:18504 redis 27305 27305 1 61.6 38.9 3621552 3163520 redis-rdb-bgsave 127.0.0.1:18504

• LOG
27164:M 01:43:35.363862 # BGSAVE - 127.0.0.1:59010 27164:M 01:43:35.397031 # Background saving started by pid 27305 27305:C 01:43:35.397250 # Start saving rdb file 27305:C 01:43:35.397380 # db0 keys: 1980118, expire keys: 0 27305:C 01:43:58.751559 # DB saved on disk 27305:C 01:43:58.773531 # RDB: 0 MB of memory used by copy-on-write 27164:M 01:43:58.877270 # Background saving terminated with success. 23 sec

ent-7.4.8

데이터를 보내는 서버에서는 Diskless 동기화를 지원한다. (바로 전송 가능)
데이터를 받는 서버에서는 Diskless 동기화를 지원하지 않는다. (파일로 받아서 로드(적재))

1. Disk to Disk

• repl-diskless-sync no
• repl-diskless-load disabled

• 1번 서버 mon.sh: RDB 생성과 생성된 RDB 파일 전송(SEND)
실시간 동기화 시작: 마지막 줄에서 'from'이 '1'로 설정되었다(2번 서버 LOAD 완료 후).
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 11:09:10 1:18504 master 995056 3.0% 2.9G 2 6 0 1 RDB(0%) 11:09:11 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(0%) 11:09:12 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(4%) 11:09:13 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(8%) 11:09:14 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(13%) 11:09:15 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(17%) 11:09:16 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(22%) 11:09:17 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(26%) 11:09:18 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(31%) 11:09:19 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(35%) 11:09:20 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(40%) 11:09:21 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(44%) 11:09:22 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(49%) 11:09:23 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(53%) 11:09:24 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(57%) 11:09:25 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(61%) 11:09:26 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(65%) 11:09:27 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(70%) 11:09:28 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(74%) 11:09:29 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(74%) 11:09:30 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(79%) 11:09:31 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(83%) 11:09:32 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(87%) 11:09:33 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(92%) 11:09:34 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(96%) 11:09:35 1:18504 master 995056 25.2% 2.9G 2 1 0 1 SEND(0%) 11:09:36 1:18504 master 995056 22.7% 2.9G 2 1 0 1 SEND(13%) 11:09:37 1:18504 master 995056 23.4% 2.9G 2 1 0 1 SEND(24%) 11:09:38 1:18504 master 995056 15.4% 2.9G 2 1 0 1 SEND(35%) 11:09:39 1:18504 master 995056 23.0% 2.9G 2 1 0 1 SEND(46%) 11:09:40 1:18504 master 995056 24.0% 2.9G 2 1 0 1 SEND(57%) 11:09:41 1:18504 master 995056 23.3% 2.9G 2 1 0 1 SEND(69%) 11:09:42 1:18504 master 995056 25.0% 2.9G 2 1 0 1 SEND(79%) 11:09:43 1:18504 master 995056 22.7% 2.9G 2 1 0 1 SEND(90%) ........ 11:09:53 1:18504 master 995056 0.1% 2.9G 3 2 1 1

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD)
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 11:09:34 1:18505 master 0 0.1% 996.6K 1 1 0 0 RECV(0%) 11:09:35 1:18505 master 0 37.4% 996.6K 1 1 0 0 RECV(13%) 11:09:36 1:18505 master 0 45.2% 996.6K 1 1 0 0 RECV(13%) 11:09:37 1:18505 master 0 47.9% 996.6K 1 1 0 0 RECV(24%) 11:09:38 1:18505 master 0 45.4% 996.6K 1 1 0 0 RECV(35%) 11:09:39 1:18505 master 0 43.9% 996.6K 1 1 0 0 RECV(46%) 11:09:40 1:18505 master 0 47.1% 996.6K 1 1 0 0 RECV(57%) 11:09:41 1:18505 master 0 47.1% 996.6K 1 1 0 0 RECV(79%) 11:09:42 1:18505 master 0 45.9% 996.6K 1 1 0 0 RECV(90%) 11:09:43 1:18505 master 692 41.4% 11.1M 1 1 0 0 LOAD(0%) 11:09:44 1:18505 master 182842 86.5% 557.2M 1 2 0 0 LOAD(18%) 11:09:45 1:18505 master 392004 92.2% 1.2G 1 1 0 0 LOAD(39%) 11:09:46 1:18505 master 584543 89.0% 1.7G 1 1 0 0 LOAD(58%) 11:09:47 1:18505 master 762538 85.1% 2.2G 1 1 0 0 LOAD(76%) 11:09:48 1:18505 master 944688 87.8% 2.8G 1 1 0 0 LOAD(94%) 11:09:49 1:18505 master 995056 87.8% 2.9G 2 5 1 0 AOF(0%) 11:09:50 1:18505 master 995056 40.6% 2.9G 2 1 1 0 AOF(0%) 11:09:51 1:18505 master 995056 0.1% 2.9G 2 1 1 0 AOF(4%) 11:09:52 1:18505 master 995056 0.1% 2.9G 3 6 1 1 AOF(8%) 11:09:53 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(13%) 11:09:54 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(17%)

• 1번 서버 RDB 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 7014 7014 5 10.3 38.1 3588628 3104692 ../src/redis-eserver 127.0.0.1:18504 redis 7057 7057 1 66.2 38.1 3588776 3103816 redis-rdb-bgsave 127.0.0.1:18504

• 2번 서버 AOF 파일 생성 중 process 상태
USER PID LWP NLWP %CPU %MEM VSZ RSS CMD redis 7052 7052 5 17.2 38.1 3588628 3104324 ../src/redis-eserver 127.0.0.1:18505 redis 7093 7093 1 61.0 38.1 3588792 3103852 redis-aof-rewrite 127.0.0.1:18505

• 1번 서버 LOG
7014:M 11:09:10.012912 # Starting BGSAVE for SYNC with target: disk 7014:M 11:09:10.041495 # Background saving started by pid 7057 7014:M 11:09:10.041570 # Master: Send +FULLRESYNC 930365256d43082a351531b324ae6abbad392dd6 0 7057:C 11:09:10.041758 # Start saving rdb file 7057:C 11:09:10.042021 # db0 keys: 995056, expire keys: 0 7057:C 11:09:34.203092 # DB saved on disk 7057:C 11:09:34.236373 # RDB: 0 MB of memory used by copy-on-write 7014:M 11:09:34.367224 # Background saving terminated with success. 24 sec 7014:M 11:09:34.367305 # Start Sending Data 3013026751 bytes to 127.0.0.1:18505 7014:M 11:09:43.709281 # Finished Sending Data. 9 sec 7014:M 11:09:44.146276 # Clone 127.0.0.1:18505 ONLINE. 7014:M 11:09:53.841454 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
7052:M 11:09:10.041705 # Received +FULLRESYNC from 127.0.0.1:18504 7052:M 11:09:10.041755 # Wait to receive(Master is saving a rdb file) 7052:M 11:09:10.041871 # Open the temp file ./data/temp-1744078150.7052.rdb fd:11 7052:M 11:09:34.367441 # Start Receiving FullSync Data 3013026751 bytes from master to disk 7052:M 11:09:43.709353 # Finished Receiving Data 3013026751 bytes. 9 sec 7052:M 11:09:43.870304 # Delete all data in memory 7052:M 11:09:43.872440 # Start Uploading Data in Memory. 7052:M 11:09:43.872478 # receiving=0 7052:M 11:09:43.872513 # startLoading loading_end_time:0 7052:M 11:09:43.872904 # Loading RDB produced by version 7.4.8 7052:M 11:09:43.872947 # RDB age 33 seconds 7052:M 11:09:43.872982 # RDB memory usage when created 3008.52 Mb 7052:M 11:09:43.873014 # db0 keys: 995056, expire keys: 0 ...................... 7052:M 11:09:49.176923 Done loading RDB, keys loaded: 995056, keys expired: 0. 7052:M 11:09:49.177004 # stopLoading loading_end_time:1744078189 7052:M 11:09:49.177063 # Finished Uploading Data in Memory. keys:995056, 6 sec 7052:M 11:09:49.306568 # CLONE <-> MASTER Synchronization Successful. ...................... 7052:M 11:09:52.840417 # Clone 127.0.0.1:18504 ONLINE. 7052:M 11:09:53.050414 # cloneCron: sync_clone_flag: 0

2. Memory to Disk

• repl-diskless-sync yes
• repl-diskless-load disabled

• 1번 서버 mon.sh: 메모리의 데이터를 바로 2번 서버로 전송(표시는 RDB)
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 12:18:47 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(0%) 12:18:48 1:18504 master 995056 28.2% 2.9G 2 1 0 1 RDB(0%) 12:18:49 1:18504 master 995056 23.3% 2.9G 2 1 0 1 RDB(17%) 12:18:50 1:18504 master 995056 22.7% 2.9G 2 1 0 1 RDB(17%) 12:18:51 1:18504 master 995056 26.7% 2.9G 2 1 0 1 RDB(26%) 12:18:52 1:18504 master 995056 23.9% 2.9G 2 1 0 1 RDB(35%) 12:18:53 1:18504 master 995056 22.9% 2.9G 2 1 0 1 RDB(44%) 12:18:54 1:18504 master 995056 22.4% 2.9G 2 1 0 1 RDB(53%) 12:18:55 1:18504 master 995056 22.7% 2.9G 2 1 0 1 RDB(62%) 12:18:56 1:18504 master 995056 22.9% 2.9G 2 1 0 1 RDB(71%) 12:18:57 1:18504 master 995056 24.0% 2.9G 2 1 0 1 RDB(80%) ........ 12:19:18 1:18504 master 995056 0.1% 2.9G 3 2 1 1

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD)
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 12:18:48 1:18505 master 0 21.0% 996.8K 1 1 0 0 RECV(16kb) 12:18:49 1:18505 master 0 33.3% 996.8K 1 1 0 0 RECV(258mb) 12:18:50 1:18505 master 0 32.1% 996.8K 1 1 0 0 RECV(529mb) 12:18:51 1:18505 master 0 26.8% 996.8K 1 1 0 0 RECV(789mb) 12:18:52 1:18505 master 0 33.9% 996.8K 1 1 0 0 RECV(1gb) 12:18:53 1:18505 master 0 32.6% 996.8K 1 1 0 0 RECV(1gb) 12:18:54 1:18505 master 0 32.8% 996.8K 1 1 0 0 RECV(2gb) 12:18:55 1:18505 master 0 33.3% 996.8K 1 1 0 0 RECV(2gb) 12:18:56 1:18505 master 0 33.2% 996.8K 1 1 0 0 RECV(2gb) 12:18:57 1:18505 master 0 33.0% 996.8K 1 1 0 0 RECV(2gb) 12:18:58 1:18505 master 0 35.3% 996.8K 1 1 0 0 RECV(3gb) 12:18:59 1:18505 master 47788 50.0% 152.3M 1 1 0 0 LOAD(4%) 12:19:00 1:18505 master 123972 50.8% 380.7M 1 2 0 0 LOAD(12%) 12:19:01 1:18505 master 196694 52.2% 598.7M 1 1 0 0 LOAD(19%) 12:19:02 1:18505 master 274957 47.7% 833.4M 1 1 0 0 LOAD(27%) 12:19:03 1:18505 master 347679 52.7% 1.0G 1 1 0 0 LOAD(34%) 12:19:04 1:18505 master 425941 50.0% 1.3G 1 1 0 0 LOAD(42%) 12:19:05 1:18505 master 500048 49.2% 1.5G 1 1 0 0 LOAD(50%) 12:19:06 1:18505 master 576232 51.5% 1.7G 1 2 0 0 LOAD(57%) 12:19:07 1:18505 master 656572 45.0% 1.9G 1 1 0 0 LOAD(65%) 12:19:08 1:18505 master 734835 48.8% 2.2G 1 1 0 0 LOAD(73%) 12:19:09 1:18505 master 808249 53.7% 2.4G 1 1 0 0 LOAD(81%) 12:19:10 1:18505 master 880970 49.0% 2.6G 1 1 0 0 LOAD(88%) 12:19:11 1:18505 master 957155 49.1% 2.8G 1 2 0 0 LOAD(96%) 12:19:12 1:18505 master 995056 49.1% 2.9G 2 1 1 0 ........ 12:19:19 1:18505 master 995056 0.1% 2.9G 3 6 1 1 AOF(26%) 12:19:20 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(31%) 12:19:21 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(35%) 12:19:22 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(40%)

• 1번 서버 LOG
10835:M 12:18:47.331090 # Starting BGSAVE for SYNC with target: clones sockets 10835:M 12:18:47.331181 # Master: Send +FULLRESYNC 98fbc0b4a69026cdfee401ced6c3403891703f08 14 10835:M 12:18:47.365555 # Background RDB transfer started by pid 10876 10876:C 12:18:47.365768 # Start saving rdb file 10876:C 12:18:47.366632 # db0 keys: 995056, expire keys: 0 10876:C 12:18:58.536415 # RDB: 0 MB of memory used by copy-on-write 10835:M 12:18:58.536505 Diskless rdb transfer, done reading from pipe, 1 replicas still up. 10835:M 12:18:58.676936 # Background RDB transfer terminated with success 10835:M 12:18:58.676980 # Streamed RDB transfer with clone 127.0.0.1:18505 succeeded (socket). Waiting for CLONECONF ACK from clone to enable streaming 10835:M 12:19:12.319511 # Clone 127.0.0.1:18505 ONLINE. 10835:M 12:19:19.489820 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
10865:M 12:18:47.331372 # Received +FULLRESYNC from 127.0.0.1:18504 10865:M 12:18:47.331408 # Wait to receive(Master is saving a rdb file) 10865:M 12:18:47.331474 # Open the temp file ./data/temp-1744082327.10865.rdb fd:12 10865:M 12:18:47.393937 # Receiving streamed RDB from master with EOF to disk 10865:M 12:18:58.545990 # Delete all data in memory 10865:M 12:18:58.546068 # Start Uploading Data in Memory. 10865:M 12:18:58.546082 # receiving=0 10865:M 12:18:58.546097 # startLoading loading_end_time:0 10865:M 12:18:58.547179 # Loading RDB produced by version 7.4.8 10865:M 12:18:58.547212 # RDB age 11 seconds 10865:M 12:18:58.547233 # RDB memory usage when created 3008.48 Mb 10865:M 12:18:58.547254 # db0 keys: 995056, expire keys: 0 10865:M 12:19:11.815226 Done loading RDB, keys loaded: 995056, keys expired: 0. 10865:M 12:19:11.815290 # stopLoading loading_end_time:1744082351 10865:M 12:19:11.815380 # Finished Uploading Data in Memory. keys:995056, 13 sec 10865:M 12:19:11.984287 # CLONE <-> MASTER Synchronization Successful. 10865:M 12:19:18.434237 # Clone 127.0.0.1:18504 ONLINE. 10865:M 12:19:19.336305 # cloneCron: sync_clone_flag: 0

3. Memory to Memory

• repl-diskless-sync yes
• repl-diskless-load on-empty-db

• 1번 서버 mon.sh: 메모리의 데이터를 바로 2번 서버로 전송(표시는 RDB)
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 12:40:31 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(0%) 12:40:32 1:18504 master 995056 28.6% 2.9G 2 1 0 1 RDB(0%) 12:40:33 1:18504 master 995056 24.8% 2.9G 2 1 0 1 RDB(8%) 12:40:34 1:18504 master 995056 24.7% 2.9G 2 1 0 1 RDB(18%) 12:40:35 1:18504 master 995056 25.0% 2.9G 2 1 0 1 RDB(27%) 12:40:36 1:18504 master 995056 24.5% 2.9G 2 1 0 1 RDB(36%) 12:40:37 1:18504 master 995056 27.5% 2.9G 2 1 0 1 RDB(46%) 12:40:38 1:18504 master 995056 24.4% 2.9G 2 1 0 1 RDB(55%) 12:40:39 1:18504 master 995056 25.9% 2.9G 2 1 0 1 RDB(64%) 12:40:40 1:18504 master 995056 28.5% 2.9G 2 1 0 1 RDB(74%) 12:40:41 1:18504 master 995056 27.4% 2.9G 2 1 0 1 RDB(83%) ........ 12:40:53 1:18504 master 995056 0.1% 2.9G 3 2 1 1

• 2번 서버 mon.sh: 데이터 받기(RECV)와 받은 데이터 메모리로 올리기(LOAD)
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 12:40:31 1:18505 master 0 12.8% 996.8K 1 1 0 0 RECV(16kb) 12:40:32 1:18505 master 0 31.9% 996.8K 1 1 0 0 RECV(263mb) 12:40:33 1:18505 master 0 33.5% 996.8K 1 1 0 0 RECV(535mb) 12:40:34 1:18505 master 0 30.8% 996.8K 1 1 0 0 RECV(807mb) 12:40:35 1:18505 master 0 30.8% 996.8K 1 1 0 0 RECV(1gb) 12:40:36 1:18505 master 0 32.7% 996.8K 1 1 0 0 RECV(1gb) 12:40:37 1:18505 master 0 35.3% 996.8K 1 1 0 0 RECV(2gb) 12:40:38 1:18505 master 0 34.4% 996.8K 1 1 0 0 RECV(2gb) 12:40:39 1:18505 master 0 35.7% 996.8K 1 1 0 0 RECV(2gb) 12:40:40 1:18505 master 0 31.8% 996.8K 1 1 0 0 RECV(2gb) 12:40:41 1:18505 master 0 33.4% 996.8K 1 1 0 0 RECV(3gb) 12:40:42 1:18505 master 193231 90.8% 588.4M 1 2 0 0 LOAD(19%) 12:40:43 1:18505 master 432866 100% 1.3G 1 1 0 0 LOAD(43%) 12:40:44 1:18505 master 515976 45.7% 1.5G 1 1 0 0 LOAD(51%) 12:40:45 1:18505 master 588699 52.8% 1.7G 1 1 0 0 LOAD(59%) 12:40:46 1:18505 master 661421 52.0% 1.9G 1 1 0 0 LOAD(66%) 12:40:47 1:18505 master 736220 48.0% 2.2G 1 1 0 0 LOAD(73%) 12:40:48 1:18505 master 838723 63.1% 2.5G 1 2 0 0 LOAD(84%) 12:40:49 1:18505 master 993170 80.1% 2.9G 1 1 0 0 LOAD(99%) 12:40:50 1:18505 master 995056 19.0% 2.9G 2 2 1 0 12:40:51 1:18505 master 995056 0.1% 2.9G 2 2 1 0 12:40:52 1:18505 master 995056 0.1% 2.9G 2 1 1 0 12:40:53 1:18505 master 995056 0.1% 2.9G 3 6 1 1 AOF(8%) 12:40:54 1:18505 master 995056 0.1% 2.9G 3 2 1 1 AOF(13%)

• 1번 서버 LOG
11946:M 12:40:31.222622 # Starting BGSAVE for SYNC with target: clones sockets 11946:M 12:40:31.222720 # Master: Send +FULLRESYNC ac50368d81c9ddec0b33ffca7bed451519652544 14 11946:M 12:40:31.255104 # Background RDB transfer started by pid 11982 11982:C 12:40:31.255256 # Start saving rdb file 11982:C 12:40:31.255386 # db0 keys: 995056, expire keys: 0 11982:C 12:40:42.059845 # RDB: 0 MB of memory used by copy-on-write 11946:M 12:40:42.059899 Diskless rdb transfer, done reading from pipe, 1 replicas still up. 11946:M 12:40:42.167213 # Background RDB transfer terminated with success 11946:M 12:40:42.167302 # Streamed RDB transfer with clone 127.0.0.1:18505 succeeded (socket). Waiting for CLONECONF ACK from clone to enable streaming 11946:M 12:40:50.894528 # Clone 127.0.0.1:18505 ONLINE. 11946:M 12:40:54.305011 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
11972:M 12:40:31.222874 # Received +FULLRESYNC from 127.0.0.1:18504 11972:M 12:40:31.222905 # Wait to receive(Master is saving a rdb file) 11972:M 12:40:31.222998 # Open the temp file ./data/temp-1744083631.11972.rdb fd:12 11972:M 12:40:31.277213 # Receiving streamed RDB from master with EOF to disk 11972:M 12:40:42.067147 # Delete all data in memory 11972:M 12:40:42.067244 # Start Uploading Data in Memory. 11972:M 12:40:42.067278 # receiving=0 11972:M 12:40:42.067301 # startLoading loading_end_time:0 11972:M 12:40:42.067342 # Loading RDB produced by version 7.4.8 11972:M 12:40:42.067364 # RDB age 11 seconds 11972:M 12:40:42.067389 # RDB memory usage when created 3008.48 Mb 11972:M 12:40:42.067415 # db0 keys: 995056, expire keys: 0 11972:M 12:40:49.911183 Done loading RDB, keys loaded: 995056, keys expired: 0. 11972:M 12:40:49.911235 # stopLoading loading_end_time:1744083649 11972:M 12:40:49.911321 # Finished Uploading Data in Memory. keys:995056, 8 sec 11972:M 12:40:50.062437 # CLONE <-> MASTER Synchronization Successful. 11972:M 12:40:53.302918 # Clone 127.0.0.1:18504 ONLINE. 11972:M 12:40:53.903054 # cloneCron: sync_clone_flag: 0

ent-7.4.8 -> ent-7.5.0 전체 데이터 동기화: 성공

◼️ 1번 서버(ent748:18504) -> 2번 서버(ent750:18505): 전체 데이터 동기화 테스트 -> 성공

◼️ 1번 서버(ent748:18504): 기본 설정으로 디스크를 사용한 동기화.
• repl-diskless-sync no
• repl-diskless-load disabled

◼️ 2번 서버(ent750:18505): 디스크를 사용하지 않는 동기화 설정(Memory(socket))
• repl-diskless-sync yes
• repl-diskless-load on-empty-db

◼️ 1번 서버(ent748:18504): mon.sh
-------------------------------------------------------------------------------------------- time ip:port role keys cpu memory clients commands from to child -------------------------------------------------------------------------------------------- 15:40:04 1:18504 master 995056 0.1% 2.9G 1 1 0 0 15:40:05 1:18504 master 995056 3.5% 2.9G 2 6 0 1 RDB(0%) 15:40:06 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(0%) 15:40:07 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(4%) 15:40:08 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(8%) 15:40:09 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(13%) 15:40:10 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(17%) 15:40:11 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(22%) 15:40:12 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(26%) 15:40:13 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(31%) 15:40:14 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(35%) 15:40:15 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(40%) 15:40:16 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(44%) 15:40:17 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(49%) 15:40:18 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(53%) 15:40:19 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(57%) 15:40:20 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(62%) 15:40:21 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(66%) 15:40:22 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(71%) 15:40:23 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(75%) 15:40:24 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(80%) 15:40:25 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(84%) 15:40:26 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(89%) 15:40:27 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(93%) 15:40:28 1:18504 master 995056 0.1% 2.9G 2 1 0 1 RDB(98%) 15:40:29 1:18504 master 995056 27.4% 2.9G 2 1 0 1 SEND(0%) 15:40:30 1:18504 master 995056 32.7% 2.9G 2 1 0 1 SEND(23%) 15:40:31 1:18504 master 995056 32.0% 2.9G 2 1 0 1 SEND(47%) 15:40:32 1:18504 master 995056 31.3% 2.9G 2 1 0 1 SEND(70%) 15:40:33 1:18504 master 995056 31.9% 2.9G 3 2 1 1

◼️ 2번 서버(ent750:18505): mon.sh
------------------------------------------------------------------------------------------------- time ip:port keys cpu memory clients commands input output from to child ------------------------------------------------------------------------------------------------- 15:40:28 1:18505 0 0.1% 997.1K 1 1 23B 207B 1B 0B 15:40:29 1:18505 198772 84.8% 605.0M 1 1 46B 207B 574M 0B RECV(19%) 15:40:30 1:18505 432173 100% 1.3G 1 1 23B 212B 674M 0B RECV(43%) 15:40:31 1:18505 662112 100% 1.9G 1 1 23B 209B 664M 0B RECV(66%) 15:40:32 1:18505 890667 100% 2.6G 1 1 23B 209B 660M 0B RECV(89%) 15:40:33 1:18505 995056 49.0% 2.9G 2 3 0B 209B 301M 0B 15:40:34 1:18505 995056 0.2% 2.9G 3 6 387B 296B 0B 0B AOF(4%) 15:40:35 1:18505 995056 0.1% 2.9G 3 3 58B 244B 14B 0B AOF(9%) ........ 15:40:55 1:18505 995056 0.1% 2.9G 3 3 59B 244B 14B 0B AOF(93%) 15:40:56 1:18505 995056 0.3% 2.9G 3 2 59B 244B 0B 0B

• 1번 서버 LOG
21233:M 15:40:05.243499 # Starting BGSAVE for SYNC with target: disk 21233:M 15:40:05.276793 # Background saving started by pid 21261 21233:M 15:40:05.276862 # Master: Send +FULLRESYNC ff6260ffdcde98d8635c258c6f24ae75a4f82880 0 21261:C 15:40:05.277048 # Start saving rdb file 21261:C 15:40:05.277224 # db0 keys: 995056, expire keys: 0 21261:C 15:40:28.400574 # DB saved on disk 21261:C 15:40:28.422850 # RDB: 0 MB of memory used by copy-on-write 21233:M 15:40:28.556551 # Background saving terminated with success. 23 sec 21233:M 15:40:28.556637 # Start Sending Data 3013026751 bytes to 127.0.0.1:18505 21233:M 15:40:32.852619 # Finished Sending Data. 4 sec 21233:M 15:40:33.018837 # Clone 127.0.0.1:18505 ONLINE. 21233:M 15:40:34.525762 # cloneCron: sync_clone_flag: 0

• 2번 서버 LOG
21256:M 15:40:05.276972 # Received +FULLRESYNC from 127.0.0.1:18504, receiving=1 21256:M 15:40:05.277007 # Full resync from master: ff6260ffdcde98d8635c258c6f24ae75a4f82880:0 21256:M 15:40:05.277024 # Wait to receive(Master is saving a rdb file) 21256:M 15:40:28.556822 # Start Receiving FullSync Data 3013026751 bytes from master to parser, receiving=2 21256:M 15:40:28.556891 # MASTER <-> CLONE sync: Flushing old data 21256:M 15:40:28.556958 # MASTER <-> CLONE sync: Loading DB in memory 21256:M 15:40:28.557016 # startLoading loading_end_time:0 21256:M 15:40:28.557085 # Loading RDB produced by version 7.4.8 21256:M 15:40:28.557143 # RDB age 23 seconds 21256:M 15:40:28.557190 # RDB memory usage when created 3008.52 Mb 21256:M 15:40:28.557245 # db0 keys: 995056, expire keys: 0 21256:M 15:40:32.863821 Done loading RDB, keys loaded: 995056, keys expired: 0. 21256:M 15:40:32.863861 # stopLoading loading_end_time:1744094432 21256:M 15:40:32.864201 # Finished Uploading Data in Memory. keys:995056, 4 sec, receiving=0 21256:M 15:40:32.864216 # MASTER -> CLONE Synchronization Successful. 21256:M 15:40:33.524406 # Clone 127.0.0.1:18504 ONLINE. 21256:M 15:40:34.200788 # cloneCron: sync_clone_flag: 0

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