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There is a more severe issue with LROC enabled in saveInodePtrs() which results in segfaults and loss of acknowledged writes, which has caused us to roll back all LROC for now. We are testing an efix (ref Defect 970773, IV76155) now which addresses this. But
I would advise against running with LROC/HAWC in production without this fix. We experienced this on 4.1.0-6, but had the efix built against 4.1.1-1, so the exposure seems likely to be all 4.1 versions.<br>
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Thx<br>
Paul<br>
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<font face="Tahoma" size="2"><b>From:</b> gpfsug-discuss-bounces@gpfsug.org on behalf of Oesterlin, Robert<br>
<b>Sent:</b> Wednesday, August 26, 2015 8:27:36 AM<br>
<b>To:</b> gpfsug main discussion list<br>
<b>Subject:</b> Re: [gpfsug-discuss] Using HAWC (write cache)<br>
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<div>Yep. Mine do too, initially. It seems after a number of days, they get marked as removed. In any case IBM confirmed it. So tread lightly.</div>
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<div style="color:rgb(0,0,0); font-family:Helvetica,sans-serif; font-size:14px"><font face="Helvetica">Bob Oesterlin<br>
Sr Storage Engineer, Nuance Communications<br>
507-269-0413</font></div>
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<span style="font-weight:bold">From: </span><<a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a>> on behalf of "Simon Thompson (Research Computing - IT Services)"<br>
<span style="font-weight:bold">Reply-To: </span>gpfsug main discussion list<br>
<span style="font-weight:bold">Date: </span>Wednesday, August 26, 2015 at 7:23 AM<br>
<span style="font-weight:bold">To: </span>gpfsug main discussion list<br>
<span style="font-weight:bold">Subject: </span>Re: [gpfsug-discuss] Using HAWC (write cache)<br>
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<div>Hmm mine seem to be working which I created this morning (on a client node):</div>
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<p style="margin:0px; font-size:11px; font-family:Menlo">mmdiag --lroc</p>
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<p style="margin:0px; font-size:11px; font-family:Menlo">=== mmdiag: lroc ===</p>
<p style="margin:0px; font-size:11px; font-family:Menlo">LROC Device(s): '0A1E017755DD7808#/dev/sdb1;' status Running</p>
<p style="margin:0px; font-size:11px; font-family:Menlo">Cache inodes 1 dirs 1 data 1 Config: maxFile 0 stubFile 0</p>
<p style="margin:0px; font-size:11px; font-family:Menlo">Max capacity: 190732 MB, currently in use: 4582 MB</p>
<p style="margin:0px; font-size:11px; font-family:Menlo">Statistics from: Tue Aug 25 14:54:52 2015</p>
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<p style="margin:0px; font-size:11px; font-family:Menlo">Total objects stored 4927 (4605 MB) recalled 81 (55 MB)</p>
<p style="margin:0px; font-size:11px; font-family:Menlo"> objects failed to store 467 failed to recall 1 failed to inval 0</p>
<p style="margin:0px; font-size:11px; font-family:Menlo"> objects queried 0 (0 MB) not found 0 = 0.00 %</p>
<p style="margin:0px; font-size:11px; font-family:Menlo"> objects invalidated 548 (490 MB)</p>
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<div>This was running 4.1.1-1.</div>
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