svn commit: r217972 - projects/graid/head/sys/geom/raid
Alexander Motin
mav at FreeBSD.org
Thu Jan 27 20:20:33 UTC 2011
On 27.01.2011 21:56, Warner Losh wrote:
> (3) Update metadata after each bundle of slabs. (mav: please comment on
> frequency)
I would do it once for every few minutes or few percents or some
comparable number of gigabytes. Doing it more often is pointless, while
it may significantly affect performance, as metadata write is
synchronous now. gmirror does it every MAXPHYS * 100 bytes, but I would
say that doing it every 12.8MB is too often for modern HDDs speeds.
--
Alexander Motin
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