On Fri, 19 Oct 2007, John Stoffel wrote:
"Justin" == Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> writes:
Justin> Is a bitmap created by default with 1.x? I remember seeing
Justin> reports of 15-30% performance degradation using a bitmap on a
Justin> RAID5 with 1.x.
Not according to the mdadm man page. I'd probably give up that
performance if it meant that re-syncing an array went much faster
after a crash.
I certainly use it on my RAID1 setup on my home machine.
John
The performance AFTER a crash yes, but in general usage I remember seeing
someone here doing benchmarks it had a negative affect on performance.
Justin.
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