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-4131 Lustre <p>Relates to <a href="https://jira.whamcloud.com/browse/LU-2298" title="Changelog does not register file modifications" class="issue-link" data-issue-key="LU-2298"><del>LU-2298</del></a></p> <p>It seems that changelog is not logging file truncates. I've not tested 2.4.1 but when I do I'll update this.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">[root@coolermaster lustre]# dd <span class="code-keyword">if</span>=/dev/zero of=truncate bs=1M count=10 10+0 records in 10+0 records out </pre> </div></div> <p>Results</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">7269327 01CREAT 00:36:19.512971520 2013.10.22 0x0 t=[0x200000bde:0x103e8:0x0] p=[0x200000007:0x1:0x0] truncate 7269328 11CLOSE 00:36:19.543968971 2013.10.22 0x242 t=[0x200000bde:0x103e8:0x0] </pre> </div></div> <p>Truncate (Reduce)</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">truncate -s -1000 truncate </pre> </div></div> <p>Results</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">7269329 14SATTR 00:36:39.677314618 2013.10.22 0xe t=[0x200000bde:0x103e8:0x0] 7269330 11CLOSE 00:36:39.678314537 2013.10.22 0x42 t=[0x200000bde:0x103e8:0x0] </pre> </div></div> <p>Truncate </p> {extend} <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">truncate -s +1000 truncate </pre> </div></div> <p>Results</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">7269331 14SATTR 00:36:54.378106399 2013.10.22 0xe t=[0x200000bde:0x103e8:0x0] 7269332 11CLOSE 00:36:54.379106360 2013.10.22 0x42 t=[0x200000bde:0x103e8:0x0] </pre> </div></div> <p>Possibly the wrong flag 'SATTR' is being sent here, as when I reduce the mask down to just TRUNC flag nothing comes through at all.</p> <p>-cf</p> Single node test system running 2.4.0 LU-4131

Changelog TRUNC flag is missing

Bug Minor Resolved Fixed Nathaniel Clark Colin Faber [X] patch Tue, 22 Oct 2013 00:41:02 +0000 Tue, 20 May 2014 13:47:58 +0000 Tue, 20 May 2014 13:47:58 +0000 Lustre 2.4.0 Lustre 2.6.0 Lustre 2.5.2 0 6 <p>Some additional info:<br/> "Use of truncate(2) does not produce any change log entries, and therefore the action is invisible. Since it appears that all versions of truncate(1) actually do an open(2)/ftruncate(2)/close(2) sequence, the CLOSE event informs of the possible size change. This is only an issue when there is a program using truncate(2) and not following that action with an open for writing and eventual close."<br/> Truncate(2) is specifically referring to the C library function truncate.<br/> This is an issue for us currently. My reading of <a href="https://jira.whamcloud.com/browse/LU-2298" title="Changelog does not register file modifications" class="issue-link" data-issue-key="LU-2298"><del>LU-2298</del></a> suggests that this is a problem because size information is not being communicated to the MDS. (Because size on MDS is not implemented.)<br/> Is this correct? As it stands, what would we need to do to get this logged on the MDS?</p> <p>note CL_TRUNC doesn't seem to be actually used anywhere.</p> <p>Patch : <a href="http://review.whamcloud.com/#/c/9639/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/9639/</a></p> <p>The first patch is marked Abandoned, will you be submitting a new patch, or should we close this issue? </p> <p>Hi Cliff,</p> <p>The first patch addressed another issue within CL_MTIME and was actually out of scope for this problem. I'll have to check to see where this issue stands on our side and will update this ticket appropriately.</p> <p>-cf</p> <p>Apologies here, actually forgot to mention the new patch link.<br/> I have abandoned first patch as Andreas suggested to created it <br/> for master branch.</p> <p>Here is the required patch.</p> <p>Patch: <a href="http://review.whamcloud.com/#/c/9723/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/9723/</a></p> <p>I will also put one more cleanup (kind of optional/independent) patch in a day or two.</p> <p>Landed for 2.5.2 and 2.6</p> Development Rank 1|hzw6j3: Rank (Obsolete) 11184 Severity