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shardingState

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shardingState

shardingState is an admin command that reports if mongod is a member of a 샤딩된 클러스터. To run the command, you must run against the admin database. See db.adminCommand().

이 명령은 다음 환경에서 호스팅되는 배포에서 사용할 수 있습니다.

  • MongoDB Atlas: 클라우드에서의 MongoDB 배포를 위한 완전 관리형 서비스

참고

이 명령은 모든 MongoDB Atlas 클러스터에서 지원됩니다. 모든 명령에 대한 Atlas 지원에 관해 자세히 알아보려면 지원되지 않는 명령을 참조하십시오.

명령은 다음과 같은 구문을 가집니다:

db.adminCommand(
{
shardingState: 1
}
)

For shardingState to detect that a mongod is a member of a sharded cluster, the mongod must satisfy the following conditions:

  1. the mongod is a primary member of a replica set, and

  2. the mongod instance is a member of a sharded cluster.

If shardingState detects that a mongod is a member of a sharded cluster, shardingState returns a document that resembles the following prototype:

{
"enabled" : true,
"configServer" : "<configdb-string>",
"shardName" : "<string>",
"shardHost" : "string:",
"versions" : {
"<database>.<collection>" : {
"placementVersion": Timestamp({ t: 1, i: 1024 }),
"timestamp": Timestamp({ t: 1682444810, i: 8 })
},
"<database>.<collection>" : {
"placementVersion": Timestamp({ t: 0, i: 0 }),
"timestamp": Timestamp({ t: 0, i: 0 })
}
},
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp({ t: 1682457265, i: 1 }),
"signature" : {
"hash" : BinData(0,"B2ViX7XLzFLS5Fl9XEuFXbwKIM4="),
"keyId" : NumberLong("6488045157173166092")
}
},
"operationTime" : Timestamp({ t: 1682457260, i: 1 })
}

Otherwise, shardingState will return the following document:

{
"enabled" : false,
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp({t:1510716515, i: 1}),
"signature" : {
"hash" : BinData(0,"B2ViX7XLzFLS5Fl9XEuFXbwKIM4="),
"keyId" : NumberLong("6488045157173166092")
}
},
"operationTime" : Timestamp({t: 1510716515, i: 1})
}

The response from shardingState when used with a config server is:

{
"enabled" : false,
"ok" : 1,
"operationTime" : Timestamp({t: 1510767613, i: 1}),
"$gleStats" : {
"lastOpTime" : Timestamp({t: 0, i: 0}),
"electionId" : ObjectId("7fffffff0000000000000001")
},
"$clusterTime" : {
"clusterTime" : Timestamp({t: 1510767613, i: 1}),
"signature" : {
"hash" : BinData(0,"IwBZ4SZjIMI5NdM62NObV/R31GM="),
"keyId" : NumberLong("6488693018630029321")
}
}
}

참고

mongos instances do not provide the shardingState.

경고

This command obtains a write lock on the affected database and will block other operations until it has completed; however, the operation is typically short lived.

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