[Beowulf] Problem with ext3 filesystem?

Eugen Leitl eugen at leitl.org
Mon Apr 20 09:00:27 EDT 2009


On Mon, Apr 20, 2009 at 09:50:45PM +1000, Chris Samuel wrote:

> > has anyone seen a performance-oriented comparison
> > of zfs with alternatives?
> 
> Somewhat dated now (tests done mid 2007) but here's a
> summary of the Bonnie results for a whole bunch of
> Linux filesystems plus ZFS on Nexenta (OpenSolaris):
> 
> http://www.csamuel.org/articles/emerging-filesystems-200709/#id2538499
> 
> Basically ZFS was OK, but was beaten by one Linux FS
> or another in most tests except for block rewrites
> and screamed ahead for block reads (very impressive,
> double the best Linux filesystem).
> 
> But a lot of work has happened since then (2.6.22.1)
> so I doubt it's that useful these days..

I've tested a 3.6 TByte 4x 1 TByte SATA zfs raidz2 on
FreeBSD (FreeNAS 0.7 amd64, Athlon 64 2 GHz, 2 GByte RAM,
Gigabit Ethernet, no jumbo frames) yesterday.

Performance was somewhere in 100-150 MBit/s, quite choppy 
(CPU load around 50%), which is rather awful. I've had one 
drive with bad sectors, so I'll try again, but I presume it 
won't make a lot of difference.

OpenSolaris will probably kill FreeBSD dead inasmuch zfs performance
is concerned.

-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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