setAllowMigrations

Definition定义

setAllowMigrations

Prevents the start of new automatic migrations on a collection, prevents in-flight manual migrations from committing, and excludes the collection from new balancer rounds.防止对集合启动新的自动迁移，防止提交正在进行的手动迁移，并将集合排除在新的平衡器循环之外。

The command has the following syntax:该命令具有以下语法：

db.adminCommand( {
  setAllowMigrations: "<db>.<collection>",
  allowMigrations: <true|false>
} )

The command takes the following parameters:该命令采用以下参数：

Field字段	Type类型	Description描述
setAllowMigrations	string	The collection to modify.要修改的集合。
allowMigrations	boolean	If false:如果为false： MongoDB prevents new automatic migrations on the collectionMongoDB阻止对集合进行新的自动迁移 in-flight manual migrations will not be committed不会提交飞行中的手动迁移 the collection will be excluded from new balancer rounds该集合将从新的平衡器轮中排除 If true:如果为true： MongoDB allows new automatic migrations on the collectionMongoDB允许对集合进行新的自动迁移 in-flight manual migrations will be committed将提交飞行中的手动迁移 the collection will be included in new balancer rounds该集合将包含在新的平衡轮中

Behavior行为

setAllowMigrations requires the same privileges as moveChunk.需要与moveChunk相同的权限。

Example示例

This operation prevents migrations on the store.inventory collection:此操作阻止在store.inventory集合上进行迁移：

db.adminCommand( {
   setAllowMigrations: "store.inventory",
   allowMigrations: false
} )