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  1. Core Server
  2. SERVER-30148

Move force primary refresh functionality out of the ShardServerCatalogCacheLoader into the ShardingState's refresh logic

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Details

    • Task
    • Status: Closed
    • Major - P3
    • Resolution: Won't Do
    • None
    • None
    • Sharding
    • Sharding EMEA
    • Sharding 2017-12-04

    Description

      We want to simplify the ShardServerCatalogCacheLoader by making a simple local loader and reader of chunk metadata. So we want to move the remote call to ensure the primary has refreshed to the latest metadata out of the ShardServerCatalogCacheLoader and instead place this functionality at a higher level in the refresh logic in ShardingState::onStaleShardVersion. A rough sketch:

      onStaleShardVersion(wantedVersion) {
      		 
          while () {
      		 
              invalidateCatalogCacheMetadata
      		 
              refreshAndLoadLocalChunkMetadata
      		 
              if (wantedVersion > locallyRefreshedVersion) {
      		 
                  optime = forcePrimaryRefresh
      		 
                  waitForOptime(optime)
      		 
              }
      		 
          }
      		 
      }

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          depends on

          Task - A task that needs to be done. SERVER-32016 Create an interruptible class/data structure that handles serializing operations per namespace

          • Major - P3 - Major loss of function.
          • Closed
          has to be done after

          Task - A task that needs to be done. SERVER-30147 Add collection task queue flush functionality to ShardServerCatalogCacheLoader and replace certain uses of waitForCollectionVersion

          • Major - P3 - Major loss of function.
          • Closed
          has to be done before

          Task - A task that needs to be done. SERVER-30550 Test that safe secondary reads is inactive until 3.6 feature compatibility version is set

          • Major - P3 - Major loss of function.
          • Closed

          Task - A task that needs to be done. SERVER-30640 Make secondary mode unit tests for ShardServerCatalogCacheLoader

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Task - A task that needs to be done. SERVER-25359 Create collection-specific ResourceMutex map to allow split/merge/move chunk on different collections to proceed in parallel

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-31595 Generate shardMaps outside MODE_X collection lock

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Task - A task that needs to be done. SERVER-62159 Complete TODO listed in SERVER-30148

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              backlog-server-sharding-emea Backlog - Sharding EMEA
              dianna.hohensee@mongodb.com Dianna Hohensee (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: