Re: nfs is slow
On Sat, 2002-02-16 at 00:13, Cameron Kerr wrote:
> On 15 Feb 2002, Andreas Leitner wrote:
>
> >
> >I am running a box with debian testing and one with woody. The testing
> >acts as a nfs server and unstable as client. They are connected via a
> >10MB hub - no real traffic, it's my home network. When I try to copy a
> >file from a local dir to a nfs dir on the unstable box it is reaaaaly
> >slow. midnight commander tells me it is copying with 23KB/s (copying a
> >file of 1300MB takes forever). That cannot be right?
>
> You should really include a couple of important options when you mount the
> NFS filesystem on the client.
>
> -- /etc/fstab --
> foo:/home /home nfs rsize=8192,wsize=8192,yourotheroptions 0 0
> ----
>
> Network transmissions are a funny thing. I wrote a program once that would
> be use a changing buffer size, from 1 byte, doubling each time it was
> called, to 1MB, the transfer speed made the most unusual shape, something
> like
>
> | ---------------------------
> | -
> | - -
> | - -
> | -
> | -
> |-
> +----------------------------------------------
> 1B 4k 8k 1MB
>
> (This is very rusty, but you get the idea that the optimal buffer size is
> 4k or 8k). Stangely enough, I haven't been able to replicate the strange
> dip...
Actually I did that. Based on the NFS Howto I came up with a set of
options, not sure what they mean now, since i set it up quite some time
ago...
myhost:/mydir /myotherdir nfs user,noexec,dev,suid,rw,rsize=8192,wsize=8192 0 0
Is there some app in debian with which i could easily messure the
saturation of my connection?
tia,
Andreas
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