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"Just like with Continuous Data Replicator, array-based replicas of supported arrays are integrated into the backup application index and catalog, allowing users to restore an array-based snapshot by simply right-clicking it within our application," said Brian Brockway, vice president of product management at CommVault. Similarly, Symantec's Veritas NetBackup is integrated with more than 40 arrays and virtual tape libraries (VTLs), and EMC NetWorker offers tight integration for EMC's RecoverPoint network-based replication product.
|Choosing a data replication solution|
1. Selection of a data replication method should start with a business impact analysis to determine required recovery time objectives (RTOs) and recovery point objectives (RPOs).
In network-based replication, the replication occurs in the network between storage arrays and servers. I/Os are split in an inline appliance or in a Fibre Channel (FC) fabric; the I/O splitter looks at the destination address of an incoming write I/O and, if it's part of a replication volume, forwards a copy of the I/O to the replication target. Network-based replication combines the benefits of array-based and host-based replication. By offloading replication from servers and arrays, it can work across a large number of server platforms and storage arrays, making it ideal for highly heterogeneous environments. Most network-based replication products also offer storage virtualization as an option or as part of the core product.
This was first published in April 2009