memcached replication failover 구현에 대한 포스팅입니다.
memcached #1, memcached #2 각 set 후 memcached #2 replication failover
1.memcache #1 server start
/usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.41 replication: connect (peer=192.168.56.41:11212) replication: marugoto copying replication: close replication: listen replication: accept
2.telnet 192.168.56.40 11211
Trying 192.168.56.40... Connected to 192.168.56.40. Escape character is '^]'. stats STAT pid 3213 STAT uptime 6 STAT time 1423123557 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.000294 STAT rusage_system 0.000483 STAT curr_items 0 STAT total_items 0 STAT bytes 0 STAT curr_connections 3 STAT total_connections 7 STAT connection_structures 4 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 0 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 7 STAT bytes_written 0 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8192 STAT repcached_wdata 0 STAT repcached_wsize 0 END
3.memcache #2 server start
/usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.40 replication: connect (peer=192.168.56.40:11212) replication: marugoto copying replication: start
telnet 192.168.56.41 11211
Trying 192.168.56.41... Connected to 192.168.56.41. Escape character is '^]'. stats STAT pid 3256 STAT uptime 6 STAT time 1423123567 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.000370 STAT rusage_system 0.000474 STAT curr_items 0 STAT total_items 0 STAT bytes 0 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 0 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 21 STAT bytes_written 0 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8192 STAT repcached_wdata 0 STAT repcached_wsize 2048 END
4.set get php sample
vi mt.php
telnet 192.168.56.41 11211
Trying 192.168.56.41... Connected to 192.168.56.41. Escape character is '^]'. stats STAT pid 3390 STAT uptime 30 STAT time 1423124181 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.171504 STAT rusage_system 1.626436 STAT curr_items 30000 STAT total_items 30000 STAT bytes 3900000 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 30000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 2797809 STAT bytes_written 0 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8192 STAT repcached_wdata 0 STAT repcached_wsize 2048 END
memcache #2 down시 memcache #1에서 set 에 대한 테스트
10. memcache #2 kill
ps -elf|grep memcache 1 S webadm 3390 1 1 80 0 - 3896 ep_pol 17:15 ? 00:00:01 /usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.40 0 S webadm 3414 3203 0 80 0 - 2616 pipe_w 17:17 pts/3 00:00:00 grep --color=auto memcache webadm@ubuntu:~$ kill -9 3390
11. memcache #1 set
php set.php -h 127.0.0.1 -p 11211 -op set -c 20000
string(12) "{key : 20000"
Memcached set END
12. memcache #1 stats
stats STAT pid 3213 STAT uptime 757 STAT time 1423124308 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.540510 STAT rusage_system 2.861457 STAT curr_items 50000 STAT total_items 50000 STAT bytes 6500000 STAT curr_connections 3 STAT total_connections 17 STAT connection_structures 7 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 50000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 4508922 STAT bytes_written 242068 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8154 STAT repcached_wdata 0 STAT repcached_wsize 0 END
13. memcache #2 start
/usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.40 webadm@ubuntu:~$ Could not open the pid file /usr/local/memcached_rep/memcachedrep.pid for writing replication: connect (peer=192.168.56.40:11212) replication: marugoto copying replication: start
14. memcache #2 stats
telnet 192.168.56.41 11211
Trying 192.168.56.41... Connected to 192.168.56.41. Escape character is '^]'. stats STAT pid 3440 STAT uptime 15 STAT time 1423124382 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.111554 STAT rusage_system 1.067313 STAT curr_items 20000 ### mamcache #2 down시 memcache#1에서 set한 20000건은??? STAT total_items 20000 ### STAT bytes 2600000 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 20000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 1880021 STAT bytes_written 0 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8192 STAT repcached_wdata 0 STAT repcached_wsize 2048 END
15. memcache #1 stats
stats STAT pid 3213 STAT uptime 891 STAT time 1423124442 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.721090 STAT rusage_system 4.069219 STAT curr_items 20000 ### mamcache #2 down시 memcache#1에서 set한 20000건은??? STAT total_items 50000 ### STAT bytes 2600000 STAT curr_connections 5 STAT total_connections 20 STAT connection_structures 7 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 50000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 4508929 STAT bytes_written 242767 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8154 STAT repcached_wdata 0 STAT repcached_wsize 2048 END
위의 상태에서 memcache #1 down시 에 대한 테스트
16. memcache #1 down
ps -elf|grep memcache 1 S webadm 3213 1 0 80 0 - 4757 ep_pol 17:05 ? 00:00:04 /usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.41 0 S webadm 3523 1290 0 80 0 - 2616 pipe_w 17:29 pts/0 00:00:00 grep --color=auto memcache webadm@ubuntu:~$ kill -9 3213 webadm@ubuntu:~$ /usr/local/memcached_rep/bin/memcached -U 0 -p 11211 -d -v -m 30720 -u root -l 0.0.0.0 -P /usr/local/memcached_rep/memcachedrep.pid -c 32767 -x 192.168.56.41 webadm@ubuntu:~$ Could not open the pid file /usr/local/memcached_rep/memcachedrep.pid for writing replication: connect (peer=192.168.56.41:11212) replication: marugoto copying replication: start
17. memcache #2 stats
stats STAT pid 3440 STAT uptime 639 STAT time 1423125006 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.124990 STAT rusage_system 1.096932 STAT curr_items 0 ### memcache #1 down시 모든 data 초기화됨 STAT total_items 20000 STAT bytes 0 STAT curr_connections 5 STAT total_connections 10 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 20000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 1880063 STAT bytes_written 4184 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8191 STAT repcached_wdata 0 STAT repcached_wsize 2048 END
18. memcache #2 stats
stats STAT pid 3529 STAT uptime 11 STAT time 1423124998 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.000476 STAT rusage_system 0.000583 STAT curr_items 0 ### memcache #1 down시 모든 data 초기화됨 STAT total_items 0 STAT bytes 0 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 0 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 21 STAT bytes_written 0 STAT limit_maxbytes 32212254720 STAT threads 2 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT replication MASTER STAT repcached_version 2.2.1 STAT repcached_qi_free 8192 STAT repcached_wdata 0 STAT repcached_wsize 2048 END