RE: [Xen-users] NFS DomU Client Performance

HAWKER, Dan
Wed, 30 Aug 2006 08:41:29 -0000

Martin, Tom & Mats,

Apologies for the delays, was away at Reading Festival drinking beer and
listening to music :)

Thanks for the info, will have a bash and report in.

Thanks again

Dan

--

Dan Hawker
Linux System Administrator
EADS Astrium

--

>
> I suspect thats the old MTU/fragmenting problem.
> Try to mount with option tcp (-o tcp).
>
> As far as I recall, udp packets larger than (1500-something)
> are transmitted in fragments and those are not reassembled
> correctly by xen.
> You can track this down by setting rsize=,wsize= to lower
> values,too. There is a limit somewhere at 14xx.
>
> Surprisingly, nobody at xen''s seems to care about this...
>
> Hope it helps,
>
> Martin

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