ZFS Stability & MySQL (Comments Requested)

Jason J. W. Williams jasonjwwilliams at gmail.com
Thu Apr 29 16:08:17 UTC 2010

Hi Olivier,

We've actually been running MySQL on ZFS on Solaris for quite some
time. :) We're very comfortable with that setup.

My question is more specific to live experience with doing the same
thing on FreeBSD. We know where the sabots are on MySQL/ZFS/Solaris.
Would like to find out where the landmines are when you swap Solaris
for FreeBSD in that equation.

Thank you again.


On Thu, Apr 29, 2010 at 8:48 AM, Olivier Smedts <olivier at gid0.org> wrote:
> 2010/4/29 Jason J. W. Williams <jasonjwwilliams at gmail.com>:
>> Hi Y'all,
>> I've written before that we're considering moving to FreeBSD 8 from
>> OpenSolaris and are heavily reliant on ZFS. Has anyone used FreeBSDs
>> ZFS implementation for a high reliability environment like a database?
>> If so, what are your experiences?
>> Basically, I'm curious how stable the implementation is and whether
>> it's ready for a critical production environment. Also, any gotchas
>> particularly with running it with MySQL or anything else that utilizes
>> a lot of memory. On Solaris, we cap the max ARC size to keep it from
>> grabbing all the system RAM and competing with MySQL.
>> Any thoughts or comments are greatly appreciated.
> No experience with databases on ZFS but I think you should set the
> recordsize property to a proper (I mean, for your MySQL setup) value
> on the FS that will hold the data.
> Have a look at :
> http://www.solarisinternals.com/wiki/index.php/ZFS_for_Databases
> Cheers
>> -J
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