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Moving data from one array to another, or from one tier of storage to another, is a tedious process that's slowly becoming more automated.
In a perfect world, you would use automated tools to migrate data. Yet data migration is too often done manually: an administrator takes the system offline, backs it up to tape, installs the new array and recovers the data to its new location. A complicated data migration may include 50 or more steps, and take a night or even a weekend to perform. For businesses operating 24 hours a day, 365 days a year, this is simply too long to have a system down.
"Downtime is costly; it costs me $30,000 an hour. That's not really that large an amount, but not having to take the NetApp filer out of service and plan downtime in off hours is beneficial," says Stephen R. O'Neill, VP of technology at Oversee Domain Services, a division of Oversee.net, in Los Angeles. "My engineers don't have to be up in the middle of the night and do all the things you do to mitigate the impact of maintenance."
You would think that migrating
| data, which is such a routine and tedious operation, would be easier.
According to a survey conducted by the New York City-based research firm TheInfoPro Inc., problems arising from migration include users suffering from extended or unexpected downtime, technical compatibility issues, data corruption, application performance issues, and missed data or data loss.
This was first published in June 2008