NFS defaults for read/write blocksize....(Was: Re: 5.4/amd64
console hang)
Willem Jan Withagen
wjw at withagen.nl
Sun Apr 17 14:10:11 PDT 2005
Willem Jan Withagen wrote:
> Kris Kennaway wrote:
>
>>> By the way, I'm thinking that more frequently hang might related with
>>> large read/write block in mount_nfs -r/-w (I use 8192, original is
>>> 1024).
>>
>>
>>
>> That's certainly possible since non-default settings don't get as much
>> testing. It would be good to get a traceback.
Sorry for the typos.
> Has it even been considered to up these values to something bigger??
even == ever
> Reason I ask, is since some discussions from a year ago tempted me to do
> some (non-scientific) NFS performance testing.
> (http://witahgen.dyndns.org/FreeBSD/nfs-performance/)
make that:
http://withagen.dyndns.org/FreeBSD/nfs-performance/
> Ever since then I'm of the opinion that sizes of read/write should be at
> least 8K, or bigger depending on the data.
>
> And yes, I'm aware that bonnie can hardly be considered a serious
> benchmark tool. But I would think that the results would warant at least
> this change.
>
> I no longer have some of the hardware, so redoing this test with
> something like 'make buildworld' is not really possible. But I'm looking
> into getting again a series of older boxes to run some more tests on.
--WjW
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