SyncIq automated data failover & failback provides the high availability to OneFS which means in the event that a primary culster becomes unavailable, SyncIQ provides the ability to failover to a mirrored, DR cluster with minimal interruption.
Please note that: SyncIQ follows asynchronous replication not synchronous.
Below are the steps that needs to be executed for Isilon SyncIQ failover and failback; this can also be used for DR testing.
To initiate failover:
1) Set the target cluster as read-write
# isi sync recovery allow-write <policy_name>
Failback can be accomplished if the policy meets the following criteria:
1) source directory is not a smartlock directory
2) The policy has been failed over
3) The policy is a Sync Policy and not a copy policy
Steps in failback:
1) Resync-prep on the policy
# isi sync recovery resync-prep <policy_name>
2) Run a typical job on the mirror policy, a final failback differential sync is preformed:
# isi sync job start <policy_name_mirror>
3) Change the mirror local target to allow writes
# isi sync recovery allow-write <policy_name_mirror>
4) Run Resync-prep again on the mirror policy
# isi sync recovery resync-prep <policy_name_mirror>
5) Delete the mirror policy
# isi sync policies delete <policy_name_mirror>
Also read Isilon SyncIQ
Happy Learning!
