Re: Benchmark: Dell/Perc 6, 8 disk RAID 10

On Fri, Mar 14, 2008 at 12:19 AM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
>
> On Fri, Mar 14, 2008 at 12:17 AM, Jesper Krogh <jesper@krogh.cc> wrote:
>  >
>  > Scott Marlowe wrote:
>  >  > On Thu, Mar 13, 2008 at 3:09 PM, justin <justin@emproshunts.com> wrote:
>  >  >
>  >  >>  I chose to use ext3 on these partition
>  >  >
>  >  > You should really consider another file system.  ext3 has two flaws
>  >  > that mean I can't really use it properly.  A 2TB file system size
>  >  > limit (at least on the servers I've tested) and it locks the whole
>  >  > file system while deleting large files, which can take several seconds
>  >  > and stop ANYTHING from happening during that time.  This means that
>  >  > dropping or truncating large tables in the middle of the day could
>  >  > halt your database for seconds at a time.  This one misfeature means
>  >  > that ext2/3 are unsuitable for running under a database.
>  >
>  >  I cannot acknowledge or deny the last one, but the first one is not
>  >  true. I have several volumes in the 4TB+ range on ext3 performing nicely.
>  >
>  >  I can test the "large file stuff", but how large? .. several GB is not a
>  >  problem here.
>
>  Is this on a 64 bit or 32 bit machine?  We had the problem with a 32
>  bit linux box (not sure what flavor) just a few months ago.  I would
>  not create a filesystem on a partition of 2+TB
>

OK, according to this it's 16TiB:
http://en.wikipedia.org/wiki/Ext2

so I'm not sure what problem we were having.  It was a friend setting
up the RAID and I'd already told him to use xfs but he really wanted
to use ext3 because he was more familiar with it.