Before entering the Continuous Data Protection (CDP) fray, EMC Corp. (NYSE: EMC)
will launch a near-CDP product next month.
EMC today announced plans to upgrade its RepliStor Windows-based asynchronous replication progam, giving it capabilities similar to Microsoft Corp.'s (Nasdaq: MSFT) Data Protection Manager (DPM).
Like DPM, Replistor 6.1 doesnt claim to be CDP, which records all changes to data for recovery at any point in time. Instead, RepliStor and DPM allow recovery from the last snapshot, which could be an hour or more ago.
Like a range of other software packages, both products use Microsoft Volume Shadow Copy Service (VSS) to create point-in-time copies of data on the host server (see Microsoft Storage Puzzles). In the case of RepliStor 6.1, that means users can create and recover snapshots of file systems and Exchange. Each product uses its own replication technology to copy the snapshots to other servers. If the main server fails or data gets corrupted, customers can restore from one of the snapshots. EMC supports remote replication; Microsoft doesn't.
EMC is working on CDP, but Rob Emsley, director of EMC software product marketing, says frequent snapshots and replication are adequate protection for Replistors SMB customer base.
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