memcached replication failover 구현에 대한 포스팅입니다.
memcached #1, memcached #2 각 set 후 memcached #2 replication failover
1.memcache #1 server start
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/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
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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
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/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
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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
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<!--?php class memcachedTools { public $filename = 'memcacheData.txt'; public $fileMode = FILE_APPEND; public $host = '127.0.0.1'; public $port = '11211'; public $memcached = null; public $list = array(); public $limit = 10000000000000; public $setlimitcount = '1000'; public function __construct($host = '127.0.0.1', $port = '11211' , $setlimitcount = 1000) { $this->memcached = new Memcache(); $this->memcached->connect($host, $port); $this->setlimitcount = $setlimitcount; } function getKeysPrint() { $i=0; foreach ($this->list as $row) { $value = $this->memcached->get($row['key']); $time = time(); $i++; var_dump("[".$i."]{key : " . $row['key'] . " , age : " . $row['age'] . " , val : " . $value . "}"); } var_dump(" Total items : " . $i); } public function setKeysToMemcached($setlimitcount = 1000) { $setlimitcount = $this->setlimitcount; var_dump("{key : " . $setlimitcount); for($i=0;$i<$setlimitcount;$i++){ $key = md5(rand(time (), true)); $val = md5(rand(time (), true)); $age = time() + 300; $this->memcached->set($key, $val, 0 , $age); } } public function getAllKeys() { $allSlabs = $this->memcached->getExtendedStats('slabs'); $items = $this->memcached->getExtendedStats('items'); foreach ($allSlabs as $server => $slabs) { foreach ($slabs as $slabId => $slabMeta) { if (!is_numeric($slabId)) { continue; } $cdump = $this->memcached->getExtendedStats('cachedump', (int)$slabId, $this->limit); foreach ($cdump as $server => $entries) { if (!$entries) { continue; } foreach ($entries as $eName => $eData) { $this->list[$eName] = array( 'key' => $eName, 'slabId' => $slabId, 'size' => $eData[0], 'age' => $eData[1] ); } } } } ksort($this->list); } } $host = '127.0.0.1'; $port = '11211'; $allowedArgs = array('-h' => 'host', '-p' => 'port', '-op' => 'action', '-c' => 'setlimitcount'); foreach ($allowedArgs as $key => $val) { $id = array_search($key, $argv); if ($id) { ${$val} = isset($argv[$id + 1]) ? $argv[$id + 1] : false; } } $obj = new memcachedTools($host, $port , $setlimitcount); switch ($action) { case 'get': $obj->getAllKeys(); $obj->getKeysPrint(); echo "Memcached get END \n" ; break; case 'set': $obj->setKeysToMemcached(); echo "Memcached set END \n" ; break; default: echo <<<EOF Example get Usage : php set.php -h 127.0.0.1 -p 11211 -op get Example set Usage : php set.php -h 127.0.0.1 -p 11211 -op set -c 10000 -h : Memcache Host address ( default is 127.0.0.1 ) -p : Memcache Port ( default is 11211 ) -p : Operation is required !! ( available options is : set , get ) -c : Memcache set count ( default is 1000 ) EOF; break; } exit; </pre> <p>5. memcache #1 set</p> <pre class="lang:sh"> php set.php -h 127.0.0.1 -p 11211 -op set -c 10000 string(12) "{key : 10000" Memcached set END </pre> <p>memcache #1 stats</p> <pre class="lang:sh"> stats STAT pid 3213 STAT uptime 351 STAT time 1423123902 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.057354 STAT rusage_system 0.173153 STAT curr_items 10000 STAT total_items 10000 STAT bytes 1300000 STAT curr_connections 5 STAT total_connections 11 STAT connection_structures 7 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 10000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 880014 STAT bytes_written 80667 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 4096 END </pre> <p>memcache #2 stats</p> <pre class="lang:sh"> stats STAT pid 3256 STAT uptime 382 STAT time 1423123943 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.039632 STAT rusage_system 0.117524 STAT curr_items 10000 STAT total_items 10000 STAT bytes 1300000 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT cmd_flush 0 STAT cmd_get 0 STAT cmd_set 10000 STAT get_hits 0 STAT get_misses 0 STAT evictions 0 STAT bytes_read 928922 STAT bytes_written 671 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 </pre> <p>6. memcache #2 set</p> <pre class="lang:sh"> php set.php -h 127.0.0.1 -p 11211 -op set -c 20000 string(12) "{key : 20000" Memcached set END </pre> <p>memcache #1 stats</p> <pre class="lang:sh"> stats STAT pid 3213 STAT uptime 484 STAT time 1423124035 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.218363 STAT rusage_system 0.917973 STAT curr_items 30000 STAT total_items 30000 STAT bytes 3900000 STAT curr_connections 5 STAT total_connections 11 STAT connection_structures 7 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 2748915 STAT bytes_written 81367 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 4096 END </pre> <p>memcache #2 stats</p> <pre class="lang:sh"> stats STAT pid 3256 STAT uptime 483 STAT time 1423124044 STAT version 1.2.8 STAT pointer_size 64 STAT rusage_user 0.268240 STAT rusage_system 0.722110 STAT curr_items 30000 STAT total_items 30000 STAT bytes 3900000 STAT curr_connections 5 STAT total_connections 7 STAT connection_structures 7 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 2688929 STAT bytes_written 161368 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 4096 END </pre> <p>7. memcache #2 kill</p> <pre class="lang:sh"> webadm@ubuntu:~$ ps -elf|grep memcache 1 S webadm 3256 1 0 80 0 - 3895 ep_pol 17:06 ? 00:00:00 /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 3374 3203 0 80 0 - 2616 pipe_w 17:14 pts/3 00:00:00 grep --color=auto memcache webadm@ubuntu:~$ kill -9 3256 </pre> <p>8. memcache #2 start</p> <pre class="lang:sh"> /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 </pre> <p>9. memcache #2 stats<br ?--> telnet 192.168.56.41 11211 |
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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
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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
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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
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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
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/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
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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
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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
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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
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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
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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 |