SRM 5.0 Array-Based Replication Is the Flagship of VMware DR

By Cameron Sturdevant  |  Posted 2012-06-14 Print this article Print

Array-Based Replication

SRM 5.0 array-based replication is the flagship of VMware DR and now provides automated failback, planned migration and an improved boot-sequence controller along with other enhancements that reduce VM configuration time.

Using the VMware-provided test environment, I saw the entire SRM 5.0 setup process and observed live implementation of all aspects of SRM 5.0. Among the new features that I observed was the new automated failback function, also called €œreprotection.€ Reprotection is only available when using array-based replication, not the new VR feature.

After running a test failover with SRM in the operating in the context of an executed recovery plan, I was able to €œfailback€ to the original protected site. During tests of the fairly small and purpose-built test environment, this operation proceeded without problems.

Similarly, the €œplanned migration€ or slow-and-careful execution of a recovery plan proceeded without problems. Planned migration could be useful after acquiring a company or when a known event, such as an approaching hurricane, makes it possible to deliberately move from one site to another. The biggest advantage of using the planned migration mode was that if errors were encountered, such as inconsistent network configurations, the migration stopped to allow for a correction. When the recovery plan was re-executed, it started at the error stop point.

SRM 5.0 has been improved compared with SRM 4.x by now supporting up to four VM boot-sequence priority levels. Boot-sequence priority is a fairly blunt way to govern how VMs are restarted at the recovery site, thus making products like VirtualSharp€™s ReliableDR appealing for ensuring that business-critical applications come up in good working order. In tests, it was clear that IT managers who had been using SRM 4.x would benefit from the increased boot-order flexibility.

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Cameron Sturdevant Cameron Sturdevant is the executive editor of Enterprise Networking Planet. Prior to ENP, Cameron was technical analyst at PCWeek Labs, starting in 1997. Cameron finished up as the eWEEK Labs Technical Director in 2012. Before his extensive labs tenure Cameron paid his IT dues working in technical support and sales engineering at a software publishing firm . Cameron also spent two years with a database development firm, integrating applications with mainframe legacy programs. Cameron's areas of expertise include virtual and physical IT infrastructure, cloud computing, enterprise networking and mobility. In addition to reviews, Cameron has covered monolithic enterprise management systems throughout their lifecycles, providing the eWEEK reader with all-important history and context. Cameron takes special care in cultivating his IT manager contacts, to ensure that his analysis is grounded in real-world concern. Follow Cameron on Twitter at csturdevant, or reach him by email at

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