await-consistent

await-consistent -timeout <timeout-secs> [-zn <id> | -znname <name> ]...
[-replica-delay-threshold <time-millis>] 

Waits for up to the specified number of seconds for the replicas in one or more zones, or in the entire store, to catch up with the masters in their associated shards. Prints information about whether consistency was achieved or, if not, details about which nodes failed to become consistent.

where:

• -timeout

  Specifies the number of seconds for the replicas to catch up with the masters in their associated shards.

• -zn <id>

  Specifies the zone name to restrict the zones whose replicas need to satisfy the requested consistency requirements. If this option is not specified, all replicas must meet the consistency requirements.

• -znname <name>

  Specifies the zone name to restrict the zones whose replicas need to satisfy the requested consistency requirements. If this option is not specified, all replicas must meet the consistency requirements.

• -replica-delay-threshold <time-millis>

  Specifies the maximum number of milliseconds that a replica may be behind the master and be considered caught up. The default if 1000 milliseconds (1 second).

When performing a switchover, you can use this command to wait for secondary nodes to catch up with their masters, and to obtain information about progress towards reaching consistency.