On Fri, Mar 24, 2006 at 07:17:00PM -0000, Brew, CAJ (Chris) wrote:
> Hi Mona,
>
> Where's your GridFTP door? Even if you have a door on the pool node, if
> you have other doors on other servers dCache will just pick one at
> random (or at least is used to) and as far as I could tell in the past
> the transfer between the door and the pool is single streamed.
>
> You could confirm if by shutting down all the GridFTP doors bar the one
> on the pool node and see if your rates improve.
>
> If that's your problem then there's not much you can do about it until
> some fixes dCache.
Hi,
The problem shows up ONLY with fts everything else (srmcp,gridftp,uberftp)
transfers the files in a sane way. Transfering directly to the door of the
pool or not has no real effect beyond increased internal network traffic for
us.
To me it looks like fts uses streams at the RAL side and then merges everything
(out of order) to one stream for the transfer to Imperial since we ask for one
stream only. As far as I can tell the bug is in the fts side and not in dCache.
Cheers,
Kostas
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