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Backup Appliance Replication -- Boon Or Boondoggle
Since backup appliances, whether NAS or VTL, only have data to replicate after you run a backup, RPO is still limited to your backup frequency of once a day. If you set up real-time replication for your mission-critical applications, you'll size the link between your primary and DR sites to deal with middle of the day traffic levels. In the middle of the night when your backups run, and the appliances replicate, some of that bandwidth will be available. The data de-duplication that backup appliances apply, because it runs on files in their static state, does a much better job of sending just the changed portions of files than any host-based replication software. So what do you think? Good idea or strange fever dream? « Trusted Web Site? Not So Fast | Main | IBM Hints At FileNet 2.0 » |
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