sh.removeTagRange()¶

Definition定义¶

sh.removeTagRange(namespace, minimum, maximum, tag)¶

Changed in version 3.4.在版本3.4中更改。This method aliases to sh.removeRangeFromZone() 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.

Removes a range of shard key values to a shard tag created using the sh.addShardTag() method. sh.removeTagRange() takes the following arguments:

Parameter参数	Type类型	Description描述
namespace	string	The namespace of the sharded collection to tag.
minimum	document	The minimum value of the shard key from the tag. Specify the minimum value in the form of <fieldname>:<value>. This value must be of the same BSON type or types as the shard key.
maximum	document	The maximum value of the shard key range from the tag. Specify the maximum value in the form of <fieldname>:<value>. This value must be of the same BSON type or types as the shard key.
tag	string	The name of the tag attached to the range specified by the minimum and maximum arguments to.

Use sh.removeShardTag() to ensure that unused or out of date ranges are removed and hence chunks are balanced as required.

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

Example示例¶

Given a shard key of {state: 1, zip: 1}, the following operation removes an existing tag range covering zip codes in New York State:

sh.removeTagRange( "exampledb.collection",
                { state: "NY", zip: MinKey },
                { state: "NY", zip: MaxKey },
                "NY"
              )