![]() Writes, a message appears in the banner at the top of the screen.Ĭlick See Details to learn about the error and the If Atlas encounters an error while sharding a collection for global Setting the numInitialChunks parameter through the When sharding an empty collection with a hashed shard key using the Atlas UI or by You can also specify the minimum number of chunks to create initially When you create a sharded collection using a compound hashed shard keyįor Global Clusters, Atlas creates at least 1 chunk perĪnd attempts to distribute chunks evenly across shards in the Select Pre-split data for even distribution This, perform one of the following actions: This action isīased on the defined zones and zone ranges for the collection. You can optionally specify whether to perform initial chunk creation andĭistribution for an empty or non-existing collection. Set isCustomShardKeyHashed through the API. This is only available onĪtlas clusters running MongoDB 4.4 and later.Ītlas distributes the sharded data evenly by hashing the secondįield of the shard key if you perform one of the following actions:Įnable the use of the hashed index shard keys by selecting The secondary shard key field can't be an array. Starting in MongoDB version 4.4, the secondary shard key field of a There can only be one secondary shard key field in a compound shard The first field of the compound shard key must be location and Atlas Global Cluster shard keys share the same Atlas Global Writesįacilitate the efficient distribution of sharded data across theĬluster. Receive the majority of write operations. To view the complete list ofĬurrently supported country or subdivision codes, seeĪ shard key on the location field alone might result in bottlenecks,Įspecially for workloads where a subset of countries or subdivisions Documents that don't match this criteria can't be routed Supported ISO-3166-2 subdivision code ( "US-DC", "DE-BE", The value of the location field must be either an Requirements prior to sharding to use Global Writes whenĮvery document in the collection must include a location Unsharded collections must meet the following compatibility Underlying collection and the manually chosen shard key intact. ![]() Removes the collection from Atlas management while leaving the Unmanage Collection to clear the warning. The Atlas UI, Atlas stops the procedure and displays a warningįor that collection in the Atlas UI. If Atlas detects that the targetĬollection was sharded with a different key than the one selected via ![]() To learn more about Online Archive, seeĪfter selecting a shard key via the Atlas UI, Atlas attempts to MongoDB-managed read-only federated database instance instead of sharding your collection Move infrequently accessed data from your Atlas cluster to a Compatibility requirements for a Global Cluster.Ītlas Limitations for Global Cluster shard keys.
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