当应用的压力小时,可以减少一些节点来减少硬件资源的成本;总之这是一个长期且持续的工作。
下面将刚刚添加的两个新节点28013 和28014 从复制集中去除掉,只需执行rs.remove 指令就可以了,具体如下:
rs1:PRIMARY> rs.remove("localhost:28014") { "ok" : 1 } rs1:PRIMARY> rs.remove("localhost:28013") { "ok" : 1 }
查看复制集状态,可以看到现在只有28010、28011、28012 这三个成员,原来的28013 和28014 都成功去除了
rs1:PRIMARY> rs.status() { "set" : "rs1", "date" : ISODate("2012-05-31T14:08:29Z"), "myState" : 1, "members" : [ { "_id" : 0, "name" : "localhost:28010", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "optime" : { "t" : 1338473273000, "i" : 1 }, "optimeDate" : ISODate("2012-05-31T14:07:53Z"), "self" : true }, { "_id" : 1, "name" : "localhost:28011", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 34, "optime" : { "t" : 1338473273000, "i" : 1 }, "optimeDate" : ISODate("2012-05-31T14:07:53Z"), "lastHeartbeat" : ISODate("2012-05-31T14:08:29Z") }, { "_id" : 2, "name" : "localhost:28012", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 34, "optime" : { "t" : 1338473273000, "i" : 1 }, "optimeDate" : ISODate("2012-05-31T14:07:53Z"), "lastHeartbeat" : ISODate("2012-05-31T14:08:29Z") } ], "ok" : 1 } rs1:PRIMARY>