On Dec 24, 2009, at 12:44 AM, Jeroen Roodhart wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: RIPEMD160
Mattias Pantzare wrote:
The ZIL is _not_ optional as the log is in UFS.
Right, thanks (also to Richard and Daniel) for the explanation. I was
afraid this was to good to be true, nice to see it stated this clearly
though.
That would leave us with three options;
1) Deal with it and accept performance as it is.
2) Find a way to speed things up further for this workload
3) Stop trying to use ZFS for this workload
Option 1 is not going to be feasible, so we're left with 2 and 3.
We will have to do some more benchmarks in the new year. Maybe if
trying different NFS wsize-s results in different figures. Also we'll
look at UFS on the Thor, although I am not looking forward to handle
large amounts of data on anything other than ZFS. Spoiled for life
probably :)
UFS is really not an option. The absolute maximum possible size for
a UFS file system is 16 TB, but 1 TB is the practical maximum. For a
thumper or thor, you'd be crazy trying to manage 24 UFS file systems.
Not a good return for the effort.
In the mean time, if any of you would have time to look at our iozone
data and spotted glaring mistakes, we would definitely appreciate your
comments.
How about posting the data somewhere we can see it?
-- richard
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
