Redis \u4e3b\u4ece\u590d\u5236\u5404\u79cd\u73af\u5883\u4e0b\u6d4b\u8bd5
\n\u6d4b\u8bd5\u73af\u5883\uff1a
\nLinux ubuntu 3.11.0-12-generic
\n2GB Mem
\n1 core of Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
\nRedis 2.6.13
\n\u4ee5\u4e0b R1 \u8868\u793amaster, R2\u8868\u793aslave
\n\u914d\u7f6e\u91c7\u7528\u8fd0\u7ef4\u7ec4\u6807\u51c6\u914d\u7f6e\uff0c\u9ed8\u8ba4\u4e3b\u4ece\u914d\u7f6e\u4e00\u6837\uff0c\u5728\u4ece\u8282\u70b9\u542f\u52a8\u540e\u8bbe\u7f6e\u4e3aslave<\/p>\n
R1: 127.0.0.1 6378
\nR2: 127.0.0.1 6379 <\/p>\n
In [34]: r2.get('key')
\nOut[34]: 'value'<\/p>\n
In [35]: r2.set('key2', 'value')
\nReadOnlyError: You can't write against a read only slave<\/p>\n
'master_host': '127.0.0.1',
\n'master_last_io_seconds_ago': -1,
\n'master_link_down_since_seconds': 4,
\n'master_link_status': 'down',
\n'master_port': 6378
\n\u91cd\u542f\u4e3b\u8282\u70b9\u540e\uff0cslave\u81ea\u52a8\u4ece\u4ece\u65b0\u5efa\u7acb\u8fde\u63a5<\/p>\n
'master_host': '127.0.0.1',
\n'master_last_io_seconds_ago': 9,
\n'master_link_status': 'up',
\n'master_port': 6378,<\/p>\n
SLAVE ->
\n'master_host': '127.0.0.1',
\n'master_last_io_seconds_ago': -1,
\n'master_link_down_since_seconds': 6,
\n'master_link_status': 'down',
\n'master_port': 6378<\/p>\n
In [37]: r2.set('key', 'value')
\nReadOnlyError: You can't write against a read only slave.
\n\u8bbe\u7f6eslave\u4e3areadonly,\u53d1\u73b0\u62a5\u9519<\/p>\n
zb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 set slave-read-only no
\n(error) READONLY You can't write against a read only slave.
\n\u9700\u8981\u5173\u95edslave\u7684slave\u7279\u6027, \u5c06\u5176\u5347\u7ea7\u4e3a\u4e3b\u8282\u70b9<\/p>\n
zb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 slaveof NO ONE
\nOK
\nzb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 set slave-read-only no
\nOK
\n\u5347\u7ea7\u4e3a\u4e3b\u8282\u70b9\u540e\uff0c\u7ee7\u7eed\u5411slave\u5199\u5165\uff1a<\/p>\n
In [38]: r2.set('key', 'value')
\nOut[38]: True<\/p>\n
In [42]: <\/p>\n
In [45]: r2.set('key2', 'value')
\nReadOnlyError: You can't write against a read only slave.<\/p>\n
In [50]: r2.set('key2', 'value')
\nOut[50]: True<\/p>\n
In [75]: r2.set('key2', 'value')
\nOut[75]: True
\n\u91cd\u542fMaster(\u6b64\u65f6\u7684master\u65e0\u6570\u636e):<\/p>\n
In [85]: r2.get('key2')<\/p>\n
In [86]: r2.get('key3')
\n\u53ef\u4ee5\u770b\u5230\uff0c\u91cd\u542f\u4e86Master\u540e\uff0cslave\u540c\u6b65\u4e86master\u72b6\u6001\uff0c\u7531\u4e8emaster\u6ca1\u6709\u6570\u636e\uff0cslave\u7684\u6570\u636e\u540c\u65f6\u88ab\u5220\u9664<\/p>\n
\u603b\u7ed3(\u90e8\u5206\u6d4b\u8bd5\u672a\u5199\u51fa\u6765):<\/p>\n
slave \u914d\u7f6e\u4e3aslave-read-only on\u9700\u8981\u5347\u7ea7\u4e3a\u4e3b\u8282\u70b9\u6216\u8005\u5199\u5165\u914d\u7f6e\u6587\u4ef6\u4e2d, \u800c\u4e0d\u80fd\u5728\u9ed8\u8ba4slave\u60c5\u51b5\u4e0b\u76f4\u63a5\u8bbe\u7f6e
\nmaster\u4e0eslave\u65ad\u5f00\u540e\u4f1a\u68c0\u6d4b\u5fc3\u8df3, \u4ece\u65b0\u5efa\u7acb\u8fde\u63a5.
\n\u53ef\u4ee5\u76f4\u63a5copy DUMP\u6587\u4ef6\u4ece\u65b0\u91cd\u542fmaster
\n\u5728Master\u4e3a\u7a7a\u4ee5\u540e\uff0cslave\u540c\u6b65\u6570\u636e\u4f1a\u62b9\u6389\u5168\u90e8\u6570\u636e.<\/p>\n","protected":false},"excerpt":{"rendered":"
Redis \u4e3b\u4ece\u590d\u5236\u5404\u79cd\u73af\u5883\u4e0b\u6d4b\u8bd5 \u6d4b\u8bd5\u73af\u5883\uff1a Linux ubuntu 3.11.0-12-generic 2GB Mem 1 core of Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz Redis 2.6.13 \u4ee5\u4e0b R1 \u8868\u793amaster, R2\u8868\u793aslave \u914d\u7f6e\u91c7\u7528\u8fd0\u7ef4\u7ec4\u6807\u51c6\u914d\u7f6e\uff0c\u9ed8\u8ba4\u4e3b\u4ece\u914d\u7f6e\u4e00\u6837\uff0c\u5728\u4ece\u8282\u70b9\u542f\u52a8\u540e\u8bbe\u7f6e\u4e3aslave R1: 127.0.0.1 6378 R2: 127.0.0.1 6379 \u521d\u59cb\u60c5\u51b5\u4e0b\u5404\u8282\u70b9info\u60c5\u51b5(\u90e8\u5206\u6709\u7528\u4fe1\u606f): MASTER -> ‘connected_slaves’: 1, #\u53ef\u5224\u65adslave\u5b58\u6d3b\u72b6\u51b5 SLAVE -> ‘master_host’: ‘127.0.0.1’, ‘master_last_io_seconds_ago’: 5, ‘master_link_status’: ‘up’, #\u53ef\u5224\u65admaster\u4e0eslave\u5b58\u6d3b\u72b6\u51b5 ‘master_port’: 6378 \u6b63\u5e38\u8bfb\u5199: In [32]: r1.set(‘key’, ‘value’) Out[32]: True In [34]: r2.get(‘key’) Out[34]: ‘value’ \u4e3b\u5907\u6b63\u5e38\u8fde\u63a5\u4e0b, \u9ed8\u8ba4slave(\u4e0d\u914d\u7f6eslave-read-only on) \u5411slave\u5199\u5165\u540e\u53d1\u73b0\u62a5\u9519 In [35]: r2.set(‘key2’, ‘value’) ReadOnlyError: You can’t write against a read only slave Master\u95ea\u65ad\uff1a Crash\u6389\u4e3b\u8282\u70b9: ‘master_host’: ‘127.0.0.1’, ‘master_last_io_seconds_ago’: -1, ‘master_link_down_since_seconds’: 4, ‘master_link_status’: ‘down’, ‘master_port’: 6378 \u91cd\u542f\u4e3b\u8282\u70b9\u540e\uff0cslave\u81ea\u52a8\u4ece\u4ece\u65b0\u5efa\u7acb\u8fde\u63a5 ‘master_host’: ‘127.0.0.1’, ‘master_last_io_seconds_ago’: 9, ‘master_link_status’: ‘up’, ‘master_port’: 6378, Crash\u6389\u4e3b\u8282\u70b9\uff0cslave\u9ed8\u8ba4(\u4e0d\u914d\u7f6eslave-read-only on \u60c5\u51b5) \u5373\u4f7fmaster\u6302\u6389\uff0cslave\u5199\u5165\u4f9d\u7136\u62a5\u9519 SLAVE -> ‘master_host’: ‘127.0.0.1’, ‘master_last_io_seconds_ago’: -1, ‘master_link_down_since_seconds’: 6, ‘master_link_status’: ‘down’, ‘master_port’: 6378 In [37]: r2.set(‘key’, ‘value’) ReadOnlyError: You can’t write against a read only slave. \u8bbe\u7f6eslave\u4e3areadonly,\u53d1\u73b0\u62a5\u9519 zb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 set slave-read-only no (error) READONLY You can’t write against a read only slave. \u9700\u8981\u5173\u95edslave\u7684slave\u7279\u6027, \u5c06\u5176\u5347\u7ea7\u4e3a\u4e3b\u8282\u70b9 zb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 slaveof NO ONE OK zb@ubuntu:~\/codes\/test$ redis-cli -h 127.0.0.1 -p 6379 set slave-read-only no OK \u5347\u7ea7\u4e3a\u4e3b\u8282\u70b9\u540e\uff0c\u7ee7\u7eed\u5411slave\u5199\u5165\uff1a In [38]: r2.set(‘key’, ‘value’) Out[38]: True \u91cd\u542fmaster, \u5982\u679c\u5c06slave\u5347\u7ea7\u4e3amaster, \u6b64\u65f6master\u4e0eslave\u5df2\u7ecf\u9694\u79bb, \u90fd\u4f5c\u4e3a\u4e3b\u8282\u70b9\u5b58\u5728(\u6ce8\u610f\u6b64\u65f6\u7684\u4e3b\u8282\u70b9\u662f\u6ca1\u6709\u6570\u636e\u7684) In [41]: r1.get(‘key’) In [42]: \u62f7\u8d1dR2\u7684dump\u6570\u636e\u5230R1\u540e\u91cd\u542f\uff1a In [43]: r1.get(‘key’) Out[43]: ‘value’ \u4ece\u65b0\u5c06R2\u8bbe\u7f6e\u4e3aR1\u7684slave(slave\u9ed8\u8ba4\u914d\u7f6e): \u5411slave\u5199\u5165: In [45]: r2.set(‘key2’, ‘value’) ReadOnlyError: You can’t write against a read only slave…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[91],"tags":[],"class_list":["post-1655","post","type-post","status-publish","format-standard","hentry","category-redis"],"_links":{"self":[{"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/1655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1655"}],"version-history":[{"count":1,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/1655\/revisions"}],"predecessor-version":[{"id":1656,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/1655\/revisions\/1656"}],"wp:attachment":[{"href":"https:\/\/oneai.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oneai.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}