On 05/20/10 12:26, Miles Nordin wrote:
I don't know, though, what to do about these reports of devices that
almost respect cache flushes but seem to lose exactly one transaction.
AFAICT this should be a works/doesntwork situation, not a continuum.
But there's so much brokenness out there. I've seen similar "tail drop"
behavior before -- last write or two before a hardware reset goes into
the bit bucket, but ones before that are durable.
So, IMHO, a cheap consumer ssd used as a zil may still be worth it (for
some use cases) to narrow the window of data loss from ~30 seconds to a
sub-second value.
- Bill
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