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這篇文章主要介紹MongoDB如何修改副本集節(jié)點(diǎn)的優(yōu)先值,文中介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們一定要看完!
復(fù)制集節(jié)點(diǎn)的優(yōu)先級影響了 elections 的結(jié)果。我們通過設(shè)置不同的優(yōu)先級來提高部分節(jié)點(diǎn)成為主節(jié)點(diǎn)的可能性,也可以讓某些節(jié)點(diǎn)不能成為主節(jié)點(diǎn)。
具體設(shè)置如下:
登陸主節(jié)點(diǎn):
test:PRIMARY> cfg = rs.conf()
{
"_id" : "test",
"version" : 4,
"protocolVersion" : NumberLong(1),
"members" : [
{
"_id" : 0,
"host" : "192.168.0.51:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 1,
"host" : "192.168.0.52:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 2,
"host" : "192.168.0.53:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 3,
"host" : "192.168.0.52:27019",
"arbiterOnly" : true,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
}
],
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"catchUpTimeoutMillis" : 60000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("5a94ff92bf8f7ba59f48e552")
}
}
修改節(jié)點(diǎn)優(yōu)先值:
test:PRIMARY> cfg.members[0].priority = 1
1
test:PRIMARY> cfg.members[0].priority = 3
3
test:PRIMARY> cfg.members[1].priority = 2
2
test:PRIMARY> cfg.members[2].priority = 1
1
應(yīng)用配置:
test:PRIMARY> rs.reconfig(cfg)
{ "ok" : 1 }
test:PRIMARY>
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