https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-8817 Lustre <p>min_ost_size() function is defined as below and it gets the min kbytesavail among the attached OST's. This function is used twice under<br/> 1. ./lustre/tests/obdfilter-survey.sh<br/> 2. ./lustre/tests/sanity-benchmark.sh</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> $LCTL get_param -n osc.*.kbytesavail | sort -n | head -n1 </pre> </div></div> <p>However, it get the MDT 's kbytesavail (OSP) which is different.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lctl get_param osc.*.kbytesavail osc.lustre-OST0000-osc-MDT0000.kbytesavail=151004 &lt;&lt; Reports <span class="code-keyword">this</span> value. osc.lustre-OST0000-osc-ffff880026480400.kbytesavail=151276 osc.lustre-OST0001-osc-MDT0000.kbytesavail=151004 osc.lustre-OST0001-osc-ffff880026480400.kbytesavail=151276 # </pre> </div></div> <p>It should report kbytesavail for OST's , which is also matching lfs df output.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lctl get_param osc.*.kbytesavail | grep -v MDT osc.lustre-OST0000-osc-ffff880026480400.kbytesavail=151276 osc.lustre-OST0001-osc-ffff880026480400.kbytesavail=151276 # </pre> </div></div> <p>Output of 'lfs df'. 'Available' field only.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> $ lfs df | grep OST | awk <span class="code-quote">'{print $4}'</span> | sort -n | head -n1 151276 </pre> </div></div> <p>Output with current code:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> $ lctl get_param -n osc.*.kbytesavail | sort -n | head -n1 151004 </pre> </div></div> LU-8817

min_ost_size function under test-framework incorrect.

Bug Minor Resolved Fixed WC Triage Arshad Hussain Wed, 9 Nov 2016 22:45:37 +0000 Tue, 13 Jun 2017 17:08:20 +0000 Tue, 13 Jun 2017 17:08:20 +0000 Lustre 2.5.1 Lustre 2.10.0 0 4 <p>Arshad Hussain (arshad.hussain@seagate.com) uploaded a new patch: <a href="http://review.whamcloud.com/23685" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/23685</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8817" title="min_ost_size function under test-framework incorrect." class="issue-link" data-issue-key="LU-8817"><del>LU-8817</del></a> tests: Update 'min_ost_size'<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 43c1df70b063f254edde8a6283a056a9565b78f9</p> <p>Arshad - Is this patch still necessary? I'm running master and I don't see the MDT's available space when I run 'lctl get_param osc.*.kbytesavail' on the client:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># lctl get_param osc.*.kbytesavail osc.scratch-OST0000-osc-ffff88007acea800.kbytesavail=307348 osc.scratch-OST0001-osc-ffff88007acea800.kbytesavail=309396 osc.scratch-OST0002-osc-ffff88007acea800.kbytesavail=309392 osc.scratch-OST0003-osc-ffff88007acea800.kbytesavail=309392 </pre> </div></div> <p>but there is an MDT:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># lfs df UUID 1K-blocks Used Available Use% Mounted on scratch-MDT0000_UUID 125368 1868 114140 2% /lustre/scratch[MDT:0] scratch-OST0000_UUID 350360 15540 307348 5% /lustre/scratch[OST:0] scratch-OST0001_UUID 350360 13492 309396 4% /lustre/scratch[OST:1] scratch-OST0002_UUID 350360 13496 309392 4% /lustre/scratch[OST:2] scratch-OST0003_UUID 350360 13496 309392 4% /lustre/scratch[OST:3] </pre> </div></div> <p>I think your patch is good and works, but I think it's not necessary ... for master. What do you think?</p> <p>Hello James,</p> <p>Thanks for the review and Apologies for delay response.</p> <p>What I could still see is that on the setup where MDS and CLIENT are on same node – min_ost_size() (lctl get_param osc.*.kbytesavail) return the value from OSP. This does not manifest on 2 node or greater setup where client is separate. I believe that it is reasonable to update min_ost_size() under test-framework.sh to cover this case also by switching to “lfs df”. </p> <p>Thanks.</p> <p>On a single node master these are the results:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lctl get_param osc.*.kbytesavail osc.lustre-OST0000-osc-MDT0000.kbytesavail=309124 &lt;&lt;&lt; min_ost_size() Reports <span class="code-keyword">this</span> value. osc.lustre-OST0000-osc-ffff880016c0a800.kbytesavail=309396 osc.lustre-OST0001-osc-MDT0000.kbytesavail=309124 osc.lustre-OST0001-osc-ffff880016c0a800.kbytesavail=309396 # </pre> </div></div> <p>However lfs df shows differently.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lfs df | grep OST | awk <span class="code-quote">'{print $4}'</span> | sort -un | head -1 309396 # </pre> </div></div> <p>This is the master version I am using</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># git log --format=oneline -5 3b3eeeb08407588c75e47a751a72fad6ac7d78f2 LU-8871 kernel: kernel upgrade [SLES12 SP2 4.4.21-84] 1bb6ce8d8cc4de97d49ab5f1d8a07b60e3dc3639 LU-4423 ptlrpc: use 64-bit times <span class="code-keyword">for</span> ptlrpc sec expiry fb403f8b5f8ba61fe0da28e7f7c5e01776717750 LU-8945 ptlrpc : remove userland usage from ptlrpc 11dfa318972db8c8d4bdc36848a4aee8072557f7 LU-8835 osc: handle 64 bit time properly in osc_cache_too_much 874690977923f9fa984f608e7bf1d6effda04e6b LU-6210 lod: Change positional struct initializers to C99 # </pre> </div></div> <p>However, on the 2 node setup the results are what you are pointing out. The mismatch does not manifest here.<br/> Running on client</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lctl get_param osc.*.kbytesavail osc.lustre-OST0000-osc-ffff88003aff3000.kbytesavail=71096 osc.lustre-OST0001-osc-ffff88003aff3000.kbytesavail=71096 </pre> </div></div> <p>lfs df</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"># lfs df | grep OST | awk <span class="code-quote">'{print $4}'</span> | sort -un | head -1 71096 # </pre> </div></div> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/23685/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/23685/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8817" title="min_ost_size function under test-framework incorrect." class="issue-link" data-issue-key="LU-8817"><del>LU-8817</del></a> tests: Update 'min_ost_size'<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 4eeff96e35c65ba818f604ead2efd66d26241dc0</p> <p>Landed for 2.10</p> Development Rank 1|hzyv33: Rank (Obsolete) 9223372036854775807 Severity