rladmin failover
Fail over primary shards of a database to their replicas.
Fails over one or more primary (also known as master) shards of a database and promotes their respective replicas to primary shards.
rladmin failover
[db { db:<id> | <name> }]
shard <id1 ... idN>
[immediate]
Parameters
| Parameter | Type/Value | Description |
|---|---|---|
| db | db:<id> name |
Fail over shards for the specified database |
| shard | one or more primary shard IDs | Primary shard or shards to fail over |
| immediate | Perform failover without verifying the replica shards are in full sync with the master shards |
Returns
Returns Finished successfully if the failover completed. Otherwise, it returns an error.
Use rladmin status shards to verify that the failover completed.
Example
$ rladmin status shards
SHARDS:
DB:ID NAME ID NODE ROLE SLOTS USED_MEMORY STATUS
db:5 tr01 redis:12 node:1 slave 0-16383 3.02MB OK
db:5 tr01 redis:13 node:2 master 0-16383 3.09MB OK
$ rladmin failover shard 13
Executing shard fail-over: OOO.
Finished successfully
$ rladmin status shards
SHARDS:
DB:ID NAME ID NODE ROLE SLOTS USED_MEMORY STATUS
db:5 tr01 redis:12 node:1 master 0-16383 3.12MB OK
db:5 tr01 redis:13 node:2 slave 0-16383 2.99MB OK