<span style=" font-size:10pt;font-family:sans-serif">Hi</span><br><br><span style=" font-size:10pt;font-family:sans-serif">Clean all counters
on the FC switches and see which port have errors .</span><br><br><span style=" font-size:10pt;font-family:sans-serif">For brocade run
:</span><br><br><span style=" font-size:10pt;font-family:sans-serif">slotstatsclear</span><br><span style=" font-size:10pt;font-family:sans-serif">statsclear</span><br><span style=" font-size:10pt;font-family:sans-serif">porterrshow</span><br><br><span style=" font-size:10pt;font-family:sans-serif">For cisco run:</span><br><span style=" font-size:9pt;font-family:Arial"> </span><br><span style=" font-size:9pt;font-family:Arial">clear countersall</span><br><br><span style=" font-size:9pt;font-family:Arial">There might be bad gbic/cable/Storage
gbic, which can affect the performance, if there is something like that
- u can see which ports have errors grow over time.</span><br><span style=" font-size:10pt;font-family:Arial">Regards</span><br><span style=" font-size:9pt;font-family:Arial"> </span><br><table width=780 style="border-collapse:collapse;"><tr height=8><td width=780 colspan=4 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><div align=center><hr noshade></div><br><span style=" font-size:1pt;font-family:Arial"> </span><tr height=8><td width=780 colspan=4 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><span style=" font-size:1pt;font-family:Arial"> </span><tr height=8><td width=516 colspan=2 style="border-style:none none none none;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><span style=" font-size:10pt;color:blue;font-family:Arial"><b>Yaron
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</span><img src=cid:_2_0DF9741C0DF96588006059D7C22582C4 alt="Related image" style="border:0px solid;"><br><br><br><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">Jonathan
Buzzard <jonathan.buzzard@strath.ac.uk></span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">gpfsug-discuss@spectrumscale.org</span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">07/07/2018
11:43 AM</span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">Re:
[gpfsug-discuss] High I/O wait times</span><br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Sent
by: </span><span style=" font-size:9pt;font-family:sans-serif">gpfsug-discuss-bounces@spectrumscale.org</span><br><hr noshade><br><br><br><tt><span style=" font-size:10pt">On 07/07/18 01:28, Buterbaugh, Kevin
L wrote:<br><br>[SNIP]<br><br>> <br>> So, to try to rule out everything but the storage array we replaced
the <br>> FC cables going from the SAN switches to the array, plugging the new
<br>> cables into different ports on the SAN switches. Then we repeated
the <br>> dd tests from a different NSD server, which both eliminated the NSD
<br>> server and its’ FC cables as a potential cause … and saw results
<br>> virtually identical to the previous test. Therefore, we feel
pretty <br>> confident that it is the storage array and have let the vendor know
all <br>> of this.<br><br>I was not thinking of doing anything quite as drastic as replacing <br>stuff, more look into the logs on the switches in the FC network and <br>examine them for packet errors. The above testing didn't eliminate bad
<br>optics in the storage array itself for example, though it does appear to
<br>be the storage arrays themselves. Sounds like they could do with a power
<br>cycle...<br><br>JAB.<br><br>-- <br>Jonathan A. Buzzard
Tel: +44141-5483420<br>HPC System Administrator, ARCHIE-WeSt.<br>University of Strathclyde, John Anderson Building, Glasgow. G4 0NG<br>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></span></tt><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=Bn1XE9uK2a9CZQ8qKnJE3Q&m=TM-kJsvzTX9cq_xmR5ITHclBCfO4FDvZ3ZxyugfJCfQ&s=Ass164qVEhb9fC4_VCmzfZeYd_BLOv9cZsfkrzqi8pM&e="><tt><span style=" font-size:10pt">https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=Bn1XE9uK2a9CZQ8qKnJE3Q&m=TM-kJsvzTX9cq_xmR5ITHclBCfO4FDvZ3ZxyugfJCfQ&s=Ass164qVEhb9fC4_VCmzfZeYd_BLOv9cZsfkrzqi8pM&e=</span></tt></a><tt><span style=" font-size:10pt"><br><br></span></tt><br><br><BR>