Date: Fri, 9 Jul 2004 14:30:09 +0000 (UTC) From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/geom/stripe g_stripe.c Message-ID: <200407091430.i69EU9qE059040@repoman.freebsd.org>
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pjd 2004-07-09 14:30:09 UTC
FreeBSD src repository
Modified files:
sys/geom/stripe g_stripe.c
Log:
Implement "FAST" mode for GEOM_STRIPE class and turn it on by default.
In this mode you can setup even very small stripe size and you can be
sure that only one I/O request will be send to every disks in stripe.
It consumes some more memory, but if allocation fails, it will fall
back to "ECONOMIC" mode.
It is about 10 times faster for small stripe size than "ECONOMIC" mode
and other RAID0 implementations. It is even recommended to use this
mode and small stripe size, so our requests are always splitted.
One can still use "ECONOMIC" mode by setting kern.geom.stripe.fast to 0.
It is also possible to setup maximum memory which "FAST" mode can consume,
by setting kern.geom.stripe.maxmem from /boot/loader.conf.
Revision Changes Path
1.4 +345 -80 src/sys/geom/stripe/g_stripe.c
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