Nosql Mongodb之旅(26)—MongoDB Replica Sets减少节点

发布时间：2020-12-13 13:45:57 所属栏目：百科来源：网络整理

导读：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: [plain] view plain copy rs1:PRIMARYrs.remove("localh

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:

[plain] 
    view plain 
    copy 
     
     
     
    
 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":1,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "members":[
{
"_id":0,108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "name":"localhost:28010",248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "health":1,108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "state":1,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "stateStr":"PRIMARY",108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "optime":{
"t":1338473273000,108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "i":1
},108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "optimeDate":ISODate("2012-05-31T14:07:53Z"),248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "self":true
},108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "_id":1,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "name":"localhost:28011",108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "health":1,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "state":2,108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "stateStr":"SECONDARY",248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "uptime":34,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "lastHeartbeat":ISODate("2012-05-31T14:08:29Z")
"_id":2,248); line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "name":"localhost:28012",108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> }
],108); list-style:decimal-leading-zero outside; color:inherit; line-height:21px; margin:0px!important; padding:0px 3px 0px 10px!important"> "ok":1
}
rs1:PRIMARY>

（编辑：李大同）

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