【发布时间】：2020-12-27 05:39:20
【问题描述】：
我已经建立了一个 mongo 副本集，其中包含一个主副本和两个辅助副本。我面临的问题是，来自与副本集连接 URL 连接的应用程序服务器的读取总是只转到一个辅助服务器，从而导致两个辅助服务器之间的读取负载出现巨大偏差。
由于这种偏差，我在一台服务器上的资源受到限制，而另一台服务器上的资源却被浪费了。
rs.status()
{
"set" : "rs0",
"date" : ISODate("2020-09-08T19:39:20.394Z"),
"myState" : 1,
"term" : NumberLong(16),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"majorityVoteCount" : 2,
"writeMajorityCount" : 2,
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1599593958, 2042),
"t" : NumberLong(16)
},
"lastCommittedWallTime" : ISODate("2020-09-08T19:39:18.908Z"),
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1599593958, 2042),
"t" : NumberLong(16)
},
"readConcernMajorityWallTime" : ISODate("2020-09-08T19:39:18.908Z"),
"appliedOpTime" : {
"ts" : Timestamp(1599593959, 1176),
"t" : NumberLong(16)
},
"durableOpTime" : {
"ts" : Timestamp(1599593958, 2042),
"t" : NumberLong(16)
},
"lastAppliedWallTime" : ISODate("2020-09-08T19:39:19.138Z"),
"lastDurableWallTime" : ISODate("2020-09-08T19:39:18.908Z")
},
"lastStableRecoveryTimestamp" : Timestamp(1599593936, 300),
"lastStableCheckpointTimestamp" : Timestamp(1599593936, 300),
"electionCandidateMetrics" : {
"lastElectionReason" : "priorityTakeover",
"lastElectionDate" : ISODate("2020-08-11T17:18:08.040Z"),
"electionTerm" : NumberLong(16),
"lastCommittedOpTimeAtElection" : {
"ts" : Timestamp(1597166288, 246),
"t" : NumberLong(15)
},
"lastSeenOpTimeAtElection" : {
"ts" : Timestamp(1597166288, 246),
"t" : NumberLong(15)
},
"numVotesNeeded" : 2,
"priorityAtElection" : 2,
"electionTimeoutMillis" : NumberLong(10000),
"priorPrimaryMemberId" : 5,
"targetCatchupOpTime" : {
"ts" : Timestamp(1597166288, 394),
"t" : NumberLong(15)
},
"numCatchUpOps" : NumberLong(148),
"newTermStartDate" : ISODate("2020-08-11T17:18:08.074Z"),
"wMajorityWriteAvailabilityDate" : ISODate("2020-08-11T17:18:10.782Z")
},
"members" : [
{
"_id" : 3,
"name" : "1.1.1.1:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 2427845,
"optime" : {
"ts" : Timestamp(1599593959, 1176),
"t" : NumberLong(16)
},
"optimeDate" : ISODate("2020-09-08T19:39:19Z"),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1597166288, 383),
"electionDate" : ISODate("2020-08-11T17:18:08Z"),
"configVersion" : 32,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 5,
"name" : "3.3.3.3:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 3672,
"optime" : {
"ts" : Timestamp(1599593954, 3378),
"t" : NumberLong(16)
},
"optimeDurable" : {
"ts" : Timestamp(1599593954, 3378),
"t" : NumberLong(16)
},
"optimeDate" : ISODate("2020-09-08T19:39:14Z"),
"optimeDurableDate" : ISODate("2020-09-08T19:39:14Z"),
"lastHeartbeat" : ISODate("2020-09-08T19:39:19.238Z"),
"lastHeartbeatRecv" : ISODate("2020-09-08T19:39:20.261Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "1.1.1.1:27017",
"syncSourceHost" : "1.1.1.1:27017",
"syncSourceId" : 3,
"infoMessage" : "",
"configVersion" : 32
},
{
"_id" : 6,
"name" : "2.2.2.2:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 3341,
"optime" : {
"ts" : Timestamp(1599593957, 2190),
"t" : NumberLong(16)
},
"optimeDurable" : {
"ts" : Timestamp(1599593957, 2190),
"t" : NumberLong(16)
},
"optimeDate" : ISODate("2020-09-08T19:39:17Z"),
"optimeDurableDate" : ISODate("2020-09-08T19:39:17Z"),
"lastHeartbeat" : ISODate("2020-09-08T19:39:18.751Z"),
"lastHeartbeatRecv" : ISODate("2020-09-08T19:39:20.078Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "1.1.1.1:27017",
"syncSourceHost" : "1.1.1.1:27017",
"syncSourceId" : 3,
"infoMessage" : "",
"configVersion" : 32
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1599593959, 1329),
"signature" : {
"hash" : BinData(0,"dfdfdggjhkljoj+mvY8="),
"keyId" : NumberLong("897987897897987")
}
},
"operationTime" : Timestamp(1599593959, 1176)
}
请帮帮我。这是 mongo 副本集集群通常所期望的吗？
提前非常感谢:)
【问题讨论】：
标签： mongodb mongodb-query replicaset