Users Guide

Replication
Data replication is a process in which storage data is duplicated to a remote system, which provides an enhanced level of
redundancy in case the main production system fails. Replication minimizes the downtime-associated costs of a system failure
and simplifies recovery following a natural disaster or human error.
PowerStore supports asynchronous remote replication for volumes and группы томов. Replication is not supported on file
systems or for virtual volumes.
To configure replication:
1. Create a remote connection between the source and destination systems
2. Configure a protection policy with a replication rule that best meets your business needs
3. Assign the protection policy to a storage resource
PowerStore enables you to failover control to the remote system and reverse the direction of a remote protection session.
Failover may be required in the following cases:
● If you want to migrate data to a new system and then switch to working from it without losing data. In this case, failover can
be performed with no data loss.
● When there is no access to the data in the source system, you can switch to the remote system and continue to work, using
the latest point-in-time remote protection copy. In such a case there may be some data loss, since the latest copy in the
remote system does not include data changes made between the time this copy was created and the time the data in the
system became inaccessible.
● When the data in the source system is accessible but its integrity may be compromised. In such a case, you should revert to
the latest point-in-time protection copy created before the data was compromised.
You can perform a failover test on the destination storage resource to test the system disaster recovery readiness.
For detailed information on replication-related procedures you can perform, refer to the Replication section.
Protection policies
A protection policy consists of snapshot rules, replication rules, or both, that you can create to establish consistent data
protection across storage resources. After configuring a protection policy, you can assign it to new or existing storage
resources.
Each protection policy can only include one replication rule, and up to four snapshot rules. A replication/snapshot rule can be
included in multiple policies.
Protection policies automatically manage snapshots or replication operations, based on the rules included in them. You can
create policies with various rules that provide different levels of protection to meet your local and remote protection needs, and
assign a policy to multiple storage resources to provide identical protection to those resources.
Based on your user privileges, you can create or modify relevant rules and policies.
If you want to create a new snapshot or replication rule, ensure that you review the parameters and your business requirements
with an administrator before proceeding. This helps achieve and maintain consistent policies across the system.
For detailed information on protection policies-related procedures you can perform, refer to the Protection Policies section.
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