How to configure Synchronous Replication between Compellent Storage Centers

Summary: Our charter is to deliver solutions that simplify IT by providing database solutions, custom development, dynamic datacenters, flexible computing

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Check out other resources

Symptoms

Applies to:

Storage Platform(s) – Dell Compellent Series 40 and Dell Compellent Series 8000 storage systems with Storage Center 6.3 and greater

Author:

Ramamohan Reddy K

Problem:

How to configure Synchronous Replication on Compellent?

Solution:

Synchronous replication will be created if we want the source and destination volumes to be synchronized at all times.

To replicate a volume from one Storage Center to another Storage Center synchronously, below are the prerequisites

Both Storages should have Storage Center versions 6.3 or above
Both the source and destination Storage Centers must be added to the Enterprise Manager Client
The Storage Centers must be connected using Fibre Channel or iSCSI, and each Storage Center must be defined on the other Storage Center.
On the source Storage Center, the destination Storage Center must be defined as a remote Storage Center.
On the destination Storage Center, the source Storage Center must be defined as a remote Storage Center.
On the source Storage Center, a quality of service (QoS) definition must be set up for the replication

Configuring Synchronous Replication:

Synchronous replication can be configured in two modes: High consistency and high availability

In the Enterprise manager Client Click the Replication & Live Volumes view on the left bottom of the pane.

Figure 1: Replication & Live
In the Replications Tab choose Replicate Volumes. Then Create Replication wizard appears.

Figure 2: Replicate Volume
Select the source storage center from where volumes should be replicated, then click Next

Figure 3: Source storage center
Select the destination storage center to which volumes to be replicated and click Next

Figure 4: Destination storage center
In the next wizard,select all the volumes that has be replicated and click Next

Figure 5: Volumes that has be replicated
In next wizard,
a) For Configuring in high consistency mode, configure the Replication attributes as
- Select Type as Asynchronous and Sync mode as High Consistency
- Select other attributes Deduplication and Replicate Active Replay if it is necessary
- Select QoS node which is created as a Prerequisite.
Select the destination volume attributesand click Next

Figure 6: QoS node

b) For Configuring in High Availability mode, configure the Replication attributes as

- Select Type as Asynchronous and Sync mode as High Availability
- Select other attributes Deduplication and Replicate Active Replay if it is necessary
- Select QoS node which is created as a Prerequisite.
Select the destination volume attributes and click Next

Figure 7: Destination volume attributes
In this wizard, review and modify the replications if necessary by clicking Edit Settings, then click Finish.

Figure 8: Review and modify the replications
We can see all the configured replication in the Replications Tab

Figure 9: Replications