These are XP clients.
> Date: Mon, 25 Jul 2011 13:28:33 -0700
> From: j...@samba.org
> To: groucho.64...@hotmail.com
> CC: samba@lists.samba.org
> Subject: Re: [Samba] Very slow write performance to RAID
>
> On Mon, Jul 25, 2011 at 01:06:48PM -0400, Kevin Taylor wrote:
> >
> > We have a RAID set up as our main fileserver (running samba 3.0.33 on
> > linux, CentOS 5). The main disk area is an XFS partition of about 8TB. I'm
> > using iostat to monitor disk I/O since we've gotten complaints about speed
> > and I'm noticing that when I write something to the samba share, the write
> > speed is horrible. For a 15GB file it is reporting to finish in about 20
> > minutes.
> >
> > iostat reports very little write I/O...on the level of maybe 7 write i/o's
> > every 5 seconds or so.
> >
> > If I were to read .5GB of data off of the samba share, it transfers quickly
> > (and I see 300 reads/s through iostat)...which would be about normal.
> >
> > Any idea of why I'm getting such lousy write speed?
>
> Test using a modern (i.e. much later than 3.0.33) smbclient.
>
> This pipelines writes so you should see much greater
> throughput if it's the client that's at fault. What
> client are you using ?
>
> Jeremy.
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