clearJumboFlag

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정의
호환성
구문
액세스 제어
예시

정의

clearJumboFlag: Clears the jumbo flag for a chunk. To use the command, issue the clearJumboFlag command on a mongos instance.

호환성

이 명령은 다음 환경에서 호스팅되는 배포에서 사용할 수 있습니다.

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중요

이 명령은 서버리스 인스턴스에서는 지원되지 않습니다. 자세한 내용은 지원되지 않는 명령을 참조하세요.

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구문

Th command has the following syntax:

db.adminCommand(
   {
     clearJumboFlag: "<database>.<collection>",
     bounds: <array>
   }
)

-또는-

// Cannot use for collections with hashed shard keys
db.adminCommand(
   {
     clearJumboFlag: "<database>.<collection>",
     find: <query>
   }
)

명령 필드

clearJumboFlag 명령은 다음 필드를 인수로 사용합니다.

필드	유형	설명
clearJumboFlag	문자열	The namespace of the sharded 컬렉션 with the jumbo chunk(s). Specify the collection's full namespace, including the database name (i.e. "<database>.<collection>")
bounds	배열	The exact bounds of a specific chunk. The array must consist of two documents that specify the lower and upper shard key values of a chunk to move: `[ { <shardKey> : <minValue> },{ <shardKey> : <maxValue> } ]` Specify either the bounds field or the 찾기 field but not both. If the collection uses a 해시 샤드 키, use the bounds field.
찾기	문서	A specific shard key and its value contained in the jumbo chunk. `{ <shardKey> : <value> }` Specify either the bounds field or the `find` field but not both. If the collection uses a 해시 샤드 키, do not use the 찾기 field. Use bounds instead.

액세스 제어

On systems running with authorization, the user must have the clearJumboFlag privilege actions on the { db: "", collection: "" } resource.

The built-in role clusterManager provides the appropriate privileges.

예시

Clear Jumbo Flag for a Chunk (Range-Based Shard Key)

The sh.status() includes the following sh.status.databases.<collection>.chunk-details for the test.jumbo collection.

... // Content omitted for brevity
test.jumbo
         shard key: { "x" : 1 }
         unique: false
         balancing: true
         chunks:
                  shardA   2
                  shardB   2
         { "x" : { "$minKey" : 1 } } -->> { "x" : 1 } on : shardB Timestamp(3, 0)
         { "x" : 1 } -->> { "x" : 2 } on : shardA Timestamp(6, 1) jumbo
         { "x" : 2 } -->> { "x" : 3 } on : shardA Timestamp(5, 1) jumbo
         { "x" : 3 } -->> { "x" : { "$maxKey" : 1 } } on : shardB Timestamp(6, 0)

The following clearJumboFlag command specifies the bounds of the { "x" : 1 } -->> { "x" : 2 } chunk:

db.adminCommand( {
   clearJumboFlag: "test.jumbo",
   bounds: [{ "x" : 1 }, { "x" : 2 }]
} )

Upon success, the command returns "ok": 1 in its output:

{
   "ok" : 1,
   "operationTime" : Timestamp(1580190080, 5),
   "$clusterTime" : {
      "clusterTime" : Timestamp(1580190080, 5),
      "signature" : {
         "hash" : BinData(0,"0cYT49s72MHUYV1F2WpoEwlyeVs="),
         "keyId" : NumberLong("6786859092951433239")
      }
   }
}

The following clearJumboFlag command specifies the 찾기 field to find the chunk that contains the shard key { "x" : 2 } :

db.adminCommand( {
   clearJumboFlag: "test.jumbo",
   find: { "x" : 2 }
} )

Upon success, the command returns "ok": 1 in its output:

{
   "ok" : 1,
   "operationTime" : Timestamp(1580191819, 5),
   "$clusterTime" : {
      "clusterTime" : Timestamp(1580191819, 5),
      "signature" : {
         "hash" : BinData(0,"N6x6drN7HUq5MR5ezUJns1rfeqY="),
         "keyId" : NumberLong("6786859092951433239")
      }
   }
}

To verify the operation, run sh.status() again. The jumbo flag should no longer appear in its output.

... // Content omitted for brevity
test.jumbo
         shard key: { "x" : 1 }
         unique: false
         balancing: true
         chunks:
                  shardA   2
                  shardB   2
         { "x" : { "$minKey" : 1 } } -->> { "x" : 1 } on : shardB Timestamp(3, 0)
         { "x" : 1 } -->> { "x" : 2 } on : shardA Timestamp(7, 0)
         { "x" : 2 } -->> { "x" : 3 } on : shardA Timestamp(8, 0)
         { "x" : 3 } -->> { "x" : { "$maxKey" : 1 } } on : shardB Timestamp(6, 0)

Clear Jumbo Flag for a Chunk (Hashed Shard Key)

The sh.status() includes the following sh.status.databases.<collection>.chunk-details for the test.jumboHashed collection. The collection uses a hashed shard key.

... // Content omitted for brevity
test.jumboHashed
         shard key: { "x" : "hashed" }
         unique: false
         balancing: true
         chunks:
                  shardA   2
                  shardB   2
         { "x" : { "$minKey" : 1 } } -->> { "x" : NumberLong(0) } on : shardA Timestamp(1, 0)
         { "x" : NumberLong(0) } -->> { "x" : NumberLong("848411777775835583") } on : shardA Timestamp(4, 0)
         { "x" : NumberLong("848411777775835583") } -->> { "x" : NumberLong("5902408780260971510") } on : shardB Timestamp(4, 1) jumbo
         { "x" : NumberLong("5902408780260971510") } -->> { "x" : { "$maxKey" : 1 } } on : shardB Timestamp(2, 2)

To clear the jumbo flag for a chunk if the collection uses a 해시 샤드 키, use clearJumboFlag with the bounds field:

db.adminCommand( {
   clearJumboFlag: "test.jumboHashed",
   bounds: [{ "x" : NumberLong("848411777775835583") }, { "x" : NumberLong("5902408780260971510") }]
} )

Upon success, the command returns "ok": 1 in its output:

{
   "ok" : 1,
   "operationTime" : Timestamp(1580194290, 5),
   "$clusterTime" : {
      "clusterTime" : Timestamp(1580194290, 5),
      "signature" : {
         "hash" : BinData(0,"nWCqOYVrab7NEGHWoo2NYENqHR4="),
         "keyId" : NumberLong("6786875525496307742")
      }
   }
}

To verify the operation, run sh.status() again. The jumbo flag should no longer appear in its output.

... // Content omitted for brevity
test.jumboHashed
         shard key: { "x" : "hashed" }
         unique: false
         balancing: true
         chunks:
                  shardA     2
                  shardB     2
         { "x" : { "$minKey" : 1 } } -->> { "x" : NumberLong(0) } on : shardA Timestamp(1, 0)
         { "x" : NumberLong(0) } -->> { "x" : NumberLong("848411777775835583") } on : shardA Timestamp(4, 0)
         { "x" : NumberLong("848411777775835583") } -->> { "x" : NumberLong("5902408780260971510") } on : shardB Timestamp(5, 0)
         { "x" : NumberLong("5902408780260971510") } -->> { "x" : { "$maxKey" : 1 } } on : shardB Timestamp(2, 2)

다음도 참조하세요.

jumbo 플래그 지우기

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checkMetadataConsistency

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