Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-44454

updateZoneKeyRange is inconsistent with updating and deleting tags when tag ranges are prefix for shard key

    XMLWordPrintableJSON

Details

    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: Major - P3 Major - P3
    • None
    • None
    • None
    • None
    • Sharding
    • ALL
    • Hide

      mongos> sh.shardCollection("test.c" , {a: 1, b: 1})
      {
          "collectionsharded" : "test.c",
          "collectionUUID" : UUID("5c33de36-7f4a-4cc0-bdf1-b8101a7d34b1"),
          "ok" : 1,
          "operationTime" : Timestamp(1573048485, 13),
          "$clusterTime" : {
              "clusterTime" : Timestamp(1573048485, 13),
              "signature" : {
                  "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                  "keyId" : NumberLong(0)
              }
          }
      }
      mongos> use admin
      mongos> sh.addShardToZone("shard01", "zone1")
      {
          "ok" : 1,
          "operationTime" : Timestamp(1573048597, 1),
          "$clusterTime" : {
              "clusterTime" : Timestamp(1573048597, 1),
              "signature" : {
                  "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                  "keyId" : NumberLong(0)
              }
          }
      }
      mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: "zone1"}) 
      {
          "ok" : 1,
          "operationTime" : Timestamp(1573048606, 8),
          "$clusterTime" : {
              "clusterTime" : Timestamp(1573048606, 8),
              "signature" : {
                  "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                  "keyId" : NumberLong(0)
              }
          }
      }
       
      mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: null}) // Command succeeds but doesn't delete the tag range.
      {
          "ok" : 1,
          "operationTime" : Timestamp(1573049199, 1),
          "$clusterTime" : {
              "clusterTime" : Timestamp(1573049199, 1),
              "signature" : {
                  "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                  "keyId" : NumberLong(0)
              }
          }
      }
      mongos> db.getSiblingDB("config").tags.find()
      { "_id" : ObjectId("5dc2d11e8bc365c6f4466713"), "ns" : "test.c", "min" : { "a" : 1, "b" : { "$minKey" : 1 } }, "max" : { "a" : 2, "b" : { "$minKey" : 1 } }, "tag" : "zone1" }
      mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1, b: MinKey}, max: {a: 2, b: MinKey}, zone: null}) // Deletes the tag range.
      {
      	"ok" : 1,
      	"operationTime" : Timestamp(1573049663, 1),
      	"$clusterTime" : {
      		"clusterTime" : Timestamp(1573049663, 1),
      		"signature" : {
      			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
      			"keyId" : NumberLong(0)
      		}
      	}
      }
      mongos> db.getSiblingDB("config").tags.find({min: {a: 1, b : MinKey}})
      mongos>
      

      Show
      mongos> sh.shardCollection( "test.c" , {a: 1, b: 1}) { "collectionsharded" : "test.c" , "collectionUUID" : UUID( "5c33de36-7f4a-4cc0-bdf1-b8101a7d34b1" ), "ok" : 1, "operationTime" : Timestamp(1573048485, 13), "$clusterTime" : { "clusterTime" : Timestamp(1573048485, 13), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> use admin mongos> sh.addShardToZone( "shard01" , "zone1" ) { "ok" : 1, "operationTime" : Timestamp(1573048597, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573048597, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: "zone1" }) { "ok" : 1, "operationTime" : Timestamp(1573048606, 8), "$clusterTime" : { "clusterTime" : Timestamp(1573048606, 8), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } }   mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: null }) // Command succeeds but doesn't delete the tag range. { "ok" : 1, "operationTime" : Timestamp(1573049199, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573049199, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.getSiblingDB( "config" ).tags.find() { "_id" : ObjectId( "5dc2d11e8bc365c6f4466713" ), "ns" : "test.c" , "min" : { "a" : 1, "b" : { "$minKey" : 1 } }, "max" : { "a" : 2, "b" : { "$minKey" : 1 } }, "tag" : "zone1" } mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1, b: MinKey}, max: {a: 2, b: MinKey}, zone: null }) // Deletes the tag range. { "ok" : 1, "operationTime" : Timestamp(1573049663, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573049663, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.getSiblingDB( "config" ).tags.find({min: {a: 1, b : MinKey}}) mongos>

    Description

      If we define a tag range based prefix of a shard key, the updateZoneKeyRange command fills in 'MinKey' for all the missing shard key fields when updating a tag range. But it doesn't do that when deleting. Users would have to specify the full shard key by adding in 'MinKey' for the missing fields.

      It would be helpful if the docs for updateZoneKeyRange also mentions this.

      Attachments

        Activity

          People

            backlog-server-sharding [DO NOT USE] Backlog - Sharding Team
            arun.banala@mongodb.com Arun Banala
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: