Administrator Guide

Synchronous replication features
17 Dell EMC SC Series: Synchronous Replication and Live Volume | CML1064
After DR activation, a replica volume can be replicated to another replica with efficiency
3.4.2 Cascade topology
The cascade topology allows asynchronous replications to be chained to synchronous or asynchronous
replication destination volumes. This topology is useful in providing immediate reprotection for a recovery site.
Similar to the mixed topology, it provides a flexible choice of locations for data recovery or business
continuation practices. It could also be used as a means of providing replicas of data in the same data center
or a remote site. Copies of Microsoft
®
SQL Server
®
or Oracle
®
databases for parallel test, development, or QA
environments are popular examples of this.
Cascade topology
3.4.3 Hybrid topology
A hybrid topology can also be created by combining mixed and cascade topology types. This configuration is
adaptable to virtually any replica or data protection needs a business may require.
Hybrid topology
3.5 Live Volume
The Live Volume feature, which is discussed in detail later in this document, is built on replication. In versions
of SCOS prior to 6.5, Live Volume was supported only with asynchronous replication. With SCOS 6.5 and