MongoDB-sharding-guide.pdf

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1、ShardingandMongoDBRelease2.4.6MongoDBDocumentationProjectSeptember03,2013Contents1ShardingIntroduction31.1PurposeofSharding............................................31.2ShardinginMongoDB..........................................31.3DataPartitioning.............................................6

2、ShardKeys................................................6RangeBasedSharding..........................................6HashBasedSharding...........................................6PerformanceDistinctionsbetweenRangeandHashBasedPartitioning.................71.4MaintainingaBalancedDataDistribution

3、................................7Splitting..................................................7Balancing.................................................7AddingandRemovingShardsfromtheCluster.............................82ShardingConcepts92.1ShardedClusterComponents................................

4、.......9Shards...................................................11ConfigServers..............................................122.2ShardedClusterArchitectures......................................13ShardedClusterRequirements......................................13ProductionClusterArchitecture....

5、.................................14ShardedClusterTestArchitecture....................................152.3ShardedClusterBehavior.........................................15ShardKeys................................................16ShardedClusterHighAvailability....................................

6、18ShardedClusterSecurity.........................................19ShardedClusterQueryRouting......................................202.4ShardingMechanics............................................24ShardedCollectionBalancing......................................25ChunkMigrationAcrossShards.....

7、................................27ChunkSplitsinaShardedCluster....................................28ShardKeyIndexes............................................29ShardedClusterMetadata.........................................