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Subject:
From:
Patrick McGuigan <[log in to unmask]>
Date:
25 Mar 2011 19:18:25 -0500Fri, 25 Mar 2011 19:18:25 -0500
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Hi,

At least one of our data servers is running into issues with load.

The data server is started with the 
xrd.sched mint 8 maxt 25 avlt 4

In the xrootd log I am seeing entries like:

110325 19:11:34 25864 XrootdXeq: xroot.18727:63@gk03 login
110325 19:11:38 25864 ofs_stat: xroot.18727:80@gk03 Unable to locate /xrd/datadisk/step09/ESD/SWT2_CPB_DATADISK; No such file or directory
110325 19:11:38 25864 XrdLink: Unable to send to xroot.18727:80@gk03; broken pipe
110325 19:11:38 25864 XrootdXeq: xroot.18727:80@gk03 disc 0:01:12 (send failure)

I am wondering what can be/should be done about the broken pipe/send failures.  What are these?


Since the data server is getting swamped, I am also seeing:
110325 19:11:59 25864 XrdScheduler: Thread limit has been reached!

I am interested in learning what is the best way to diagnose the problem to determine what to change on the system.

Regards,

Patrick



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