fsync() and disk flushes
Posted Apr 4, 2009 0:01 UTC (Sat) by giraffedata
In reply to: fsync() and disk flushes
Parent article: That massive filesystem thread
The answer is RAID and UPS, but not that way. The RAID goes over the UPS; e.g. a mirror of two disk drives, each with its own UPS.
Such redundancy also makes it possible to test the UPS regularly and avoid the problem of two dead batteries when the external power fails.
The UPS doesn't count if you don't test, measure, and/or replace the its battery regularly.
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