sh.addShardTag()¶

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Definition¶

sh.addShardTag(shard, tag)¶

Changed in version 3.4: This method aliases to sh.addShardToZone() in MongoDB 3.4. The functionality specified below still applies to MongoDB 3.2. MongoDB 3.4 provides Zone sharding as the successor to tag-aware sharding.

Associates a shard with a tag or identifier. MongoDB uses these identifiers to direct chunks that fall within a tagged range to specific shards. sh.addTagRange() associates chunk ranges with tag ranges.

Parameter	Type	Description
`shard`	string	The name of the shard to which to give a specific tag.
`tag`	string	The name of the tag to add to the shard.

Only issue sh.addShardTag() when connected to a mongos instance.

Example¶

The following example adds three tags, NYC, LAX, and NRT, to three shards:

sh.addShardTag("shard0000", "NYC")
sh.addShardTag("shard0001", "LAX")
sh.addShardTag("shard0002", "NRT")