Re: NFS Still broken in 2.6.x?

[Grant Coady]

On Fri, 24 Feb 2006 11:18:44 -0500, Bryan Fink <bfink@xxxxxxxxxxxxxxxx> wrote:

>Hi again. I just found some new, very interesting information. Until 
>just a few minutes ago, I hadn't realized that one could change the I/O 
>scheduler at runtime. Looking into it, my system was using "cfq", and I 
>have three other options, "noop", "anticipatory", and "deadline". I've 
>now run tests using all three of the other schedulers, and they all 
>bring performance back up to the level I had with kernel 2.4. So, either 
>NFS is incompatible with cfq, or cfq has some issues that show very 
>vividly when used with NFS (or, I suppose, I just have my system tuned 
>wrong for use with cfq).

I run NFS for ages -- all linux boxen here mount a shared export from 
localnet controller box to get source + patches.

Only have 'deadline' installed on 2.6 kernels -- not seen any problems 
with NFS here (apart from back when I had data corruption due a faulty 
memory stick).

Grant.
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