Date: Wed, 12 Dec 2007 19:00:46 -0800 From: "Kip Macy" <kip.macy@gmail.com> To: "Hugo Silva" <hugo@barafranca.com> Cc: freebsd-current@freebsd.org, Benjamin Close <Benjamin.Close@clearchain.com> Subject: Re: ZFS melting under postgres... Message-ID: <b1fa29170712121900k5d5a7aa1t668dc7c0532a6f29@mail.gmail.com> In-Reply-To: <47609FE3.8040606@barafranca.com> References: <47606C09.2070209@isc.org> <47609F0A.7010805@clearchain.com> <47609FE3.8040606@barafranca.com>
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On Dec 12, 2007 6:58 PM, Hugo Silva <hugo@barafranca.com> wrote: > > Benjamin Close wrote: > > Peter Losher wrote: > >> Hi, > >> > >> As part of our testing 7.0/ZFS we tried putting it thru it's paces > >> having ZFS act as our storage medium for some test pgsql db's (like for > >> sqlgrey, etc) and in both BETA2 and BETA4 (amd64) we get the same > >> results with a RAIDZ2 container: > >> > >> -=- > >> Dec 12 14:24:12 nsa sqlgrey: fatal: setconfig error at > >> /usr/local/sbin/sqlgrey line 186. > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad4 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad6 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad8 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad10 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad12 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad14 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad16 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad18 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad4 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad6 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad8 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad10 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad12 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad14 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad16 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad18 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: zpool I/O failure, zpool=vault error=86 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad4 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad6 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad8 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad10 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad12 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad14 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad16 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad18 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa postgres[50527]: [5-1] PANIC: could not write to > >> log file 2, segment 53 at offset 7864320, length 8192: Input/output > >> error > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad4 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad6 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad8 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad10 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad12 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad14 offset=3665128448 size=22016 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad16 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: checksum mismatch, zpool=vault > >> path=/dev/ad18 offset=3665128448 size=21504 > >> Dec 12 16:49:53 nsa root: ZFS: zpool I/O failure, zpool=vault error=86 > >> Dec 12 16:49:53 nsa postgres[50596]: [1-1] FATAL: the database system > >> is starting up > >> Dec 12 16:49:53 nsa kernel: pid 50527 (postgres), uid 70: exited on > >> signal 6 (core dumped) > >> -=- > >> > >> It basically corrupts the container from the inside until it fails > >> completely (usually withing 24-48 hours depending on how busy the db is) > >> > >> I had thought it was a bad SATA replicator/controller, but we had that > >> replaced w/ one from Supermicro. So it's either the disks, or something > >> in ZFS. Anyone used ZFS to backend any db's (mysql or pgsql?) > >> > >> If you need more info, let me know... > >> > >> > > Try turning of zil, whilst I don't use a db, I have zfs under high > > load. I've found without zil turned off I see checksum corruption as > > well: > > > > /boot/loader.conf > > > > vfs.zfs.zil_disable=1 > > > > Cheers, > > Benjamin > > Wouldn't it be a bad idea to disable ZIL ? > > http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Disabling_the_ZIL_.28Don.27t.29 Yes. However, FreeBSD suffers from deadlocks under load if ZIL is enabled. -Kip
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