Delete a Keyspace
Although adding a keyspace is implicit, deleting one is not. In order to delete a keyspace, you must first bring down all tablets on that keyspace.
Following this, you should delete all shards of a keyspace. In the current example,
commerce has only one shard (
0). You can use the following command to delete it:
vtctlclient DeleteShard -recursive commerce/0
recursive flag is required to ensure that the shard is deleted from all cells. If there are tablets still running against the shard, the command will fail.
You can add an
-even_if_serving flag to ignore running tablets, but it is not recommended. Otherwise, this would cause existing vttablets to get confused about their tablet records being deleted.
If a keyspace has more than one shard, each one must be deleted individually.
Once all shards are deleted, you can delete the keyspace with:
vtctlclient DeleteKeyspace commerce
DeleteKeyspace also supports a
-recursive flag that loops through all shards and deletes them recursively, but also ignores any tablets that are running. Note that restarting a vttablet for the deleted keyspace will cause the keyspace to be recreated. This is yet another reason for ensuring that all vttablets are shutdown upfront.