> 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...
>>
>
> Yes. However, FreeBSD suffers from deadlocks under load if ZIL is enabled.
>
> -Kip
>
