Hi Chris,
>> AS DTEAM TO se03.esc.qmul.ac.uk <http://se03.esc.qmul.ac.uk> (STORM)
>>
>> for 98 roughly parallel transfers:
>>
>> 49 FAILED - Connection Timed Out
>> 49 SUCCESS - Took
>>
>
> So it looks like you hit the 50 simultaneous GridFTP connection limit
> (with presumably one other connection elsewhere).
>
> I actually thought I'd raised this to 100, but clearly wasn't
> successful. Is there a recommended number of connections?
It depends on your infrastructure: you would have to judge what the
maximum number is that your services and network can support.
If a VO that you support hits the limit too often, it would need to
make its work flows more intelligent, while you might plan for the
expansion, upgrade or reconfiguration of resources that manifest
themselves as bottlenecks.
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