Re: How can I boost block I/O performance

[Jesper Juhl]

On 5/6/06, Dave Pitts <dpitts@xxxxxxxx> wrote:
> Hello all:
>
> I've been trying some hacks to boost disk I/O performance
[snip]
> This test is running several NFS clients to a RAID disk storage array. I
[snip]

For improving performance of NFS servers I've often had good success
with increasing the 'rsize' and 'wsize' options.
The default values are 4096, I personally set them to 16384 which
usually helps NFS performance quite a bit. At least that's my
experience.
Simply add  rsize=16384,wsize=16384  to the nfs mount options in
/etc/fstab and see if that improves performance for you (values like
8192 and 32768 may also be worth testing, but personally I've found -
at least with my setups - that 16384 seems to be the magic value).
('man 8 mount' and 'man 5 exports' also have more interresting options
you may want to experiment with, but just rsize & wsize on their own
should be a boost)

--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/