More zfs benchmarks

Jonathan Belson jon at
Sun Feb 14 22:59:08 UTC 2010

On 14 Feb 2010, at 21:15, Joshua Boyd wrote:

> Repeated the same tests on my AMD64 dual core 4GB system with 5 HD103SI 1T
> drives in raidz1 on a Supermicro PCI-E controller, running 8-STABLE.

[ snip results ]

I was hoping I'd get something closer to these figures...

> Here are my relevant settings:
> vfs.zfs.prefetch_disable=0
> vfs.zfs.zil_disable="1"

I already had prefetch disabled, but retrying with zil disabled made no difference.

What is your arc_min and arc_max set to?

> On Sun, Feb 14, 2010 at 3:34 PM, Michael Loftis <mloftis at> wrote:
>> You really need to test with at least 4GB of data, else you're just testing
>> caching speeds on writing.  Use a test suite like bonnie++ and you'll see

I'd expect to get more than 4MB/s if I was just measuring cache speed :-)



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