Abstract
No matter how carefully you plan, the unexpected will happen. Somewhere, sometime, you are going to need to recover from a problem. That’s what happened to the SETI@home crew. They hadn’t planned on bringing down the user database machine the hard way, nor had they planned on having one of the disks on their science database fail at the same time. Fortunately, they had everything they needed to recover from that little problem and pickup where they left off.
Yesterday an unnamed film crew plugged a gigawatt of lighting equipment into one of our uninterruptible power supplies. Not unexpectedly, it was interrupted, temporarily bringing down the user database machine. At about the same time on the science database machine one of the disks failed. Thanks to RAID, the hot swap disk kicked in. Unfortunately the hot swap also failed, revealing a more serious problem. It didn’t automatically kick over to the second hot swap. Today we rebooted the science database machine that brought the second hot swap online. The RAID controller worked as advertised and the science database kept operating with just a momentary lapse and no data loss.
—SETI@home, Technical Newsletter, November 2, 1999
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© 2001 Josef Finsel
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Finsel, J. (2001). How Do I Back Up and Restore My Data?. In: The Handbook for Reluctant Database Administrators. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4302-1146-4_4
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DOI: https://doi.org/10.1007/978-1-4302-1146-4_4
Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-893115-90-3
Online ISBN: 978-1-4302-1146-4
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