UR pair operations
You perform different tasks on UR pairs in day to day operations as a Storage Administrator.
- Parent Topic
- Universal Replicator
Universal Replicator provides asynchronous, real-time replication of data from one storage system to another over any distance to satisfy the most demanding business continuity and disaster recovery requirements. While conventional replication solutions push updates from the primary storage system to a remote location, Universal Replicator at the remote site pulls changes from journal volumes maintained by the storage system at the primary site. This approach offloads replication overhead from the primary storage system and dramatically reduces the impact of replication on the business application. Transmitted record sets include a sequence number, enabling the replication engine to verify receipt of all records at the remote site and to sequence writes in the correct order for storage replication.
- Universal Replicator
- Child Topics
- Pair operations
- Creating a
UR pair
When you create a pair, the pair relationship between the volumes is established, and the initial copy operation is performed. The P-VOL remains available to the host for I/O operations during the initial copy operation.
- Checking the pair status
- Splitting a
UR pair
When you split a pair, write-data is no longer sent to the S-VOL and the pair is no longer synchronized. Splitting a pair or mirror gives you a point-in-time copy of the P-VOL.
- Splitting a mirror
- Creating point-in-time copies
Universal Replicator allows you to make Point-in-Time (PiT) copies of volumes in the same journal. Point-in-Time describes a copy of data made when you made it.
- Resynchronizing a
UR pair
Resynchronizing a pair updates the S-VOL with differential data that accumulated since the pair was split. After the pair is resynchronized, the S-VOL is again updated from the journals.
- Resynchronizing a mirror
When you resynchronize a mirror, all the pairs with the mirror ID are resynchronized and update data copy to the S-VOL is resumed.
- Deleting a
UR pair
- Deleting a mirror
- Managing pairs in a GAD 3DC delta resync environment