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-12768 Lustre <p>Hello,</p> <p>We're playing with <tt>readcache_max_filesize</tt> to adjust OSS caching per object size, but while it seems to work on Oak (2.10.8), we can't find the tunable with 2.12. Did we miss something obvious? Thanks!</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@fir-io1-s1 ~]# lctl get_param obdfilter.*.readcache_max_filesize error: get_param: param_path 'obdfilter/*/readcache_max_filesize': No such file or directory [root@fir-io1-s1 ~]# ls /sys/fs/lustre/obdfilter/fir-OST0000/ blocksize client_cache_count degraded filestotal grant_precreate kbytesfree lfsck_speed_limit seqs_allocated sync_journal tgt_fmd_count uuid checksum_t10pi_enforce client_cache_seconds filesfree fstype kbytesavail kbytestotal precreate_batch soft_sync_limit sync_lock_cancel tgt_fmd_seconds [root@fir-io1-s1 ~]# cat /sys/fs/lustre/version 2.12.2_119_g2d4809a </pre> </div></div> <p><a href="https://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#idm140482875762544" class="external-link" target="_blank" rel="nofollow noopener">https://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#idm140482875762544</a><br/>  <br/> Thanks!<br/> Stephane<br/>  </p> 2.12.2_116+3 patches, CentOS 7.6 LU-12768

readcache_max_filesize in 2.12?

Bug Minor Resolved Done Patrick Farrell Stephane Thiell Mon, 16 Sep 2019 17:32:39 +0000 Wed, 17 Feb 2021 22:07:43 +0000 Wed, 18 Sep 2019 15:55:50 +0000 Lustre 2.12.2 Lustre 2.14.0 0 5 <p>Stephane,</p> <p>It's been moved:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>lctl list_param *.*OST0000*.*readcache* osd-ldiskfs.lustre-OST0000.readcache_max_filesize </pre> </div></div> <p> </p> <p>Thanks Patrick! It works!</p> <p> </p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@fir-io1-s1 ~]# lctl get_param osd-ldiskfs.fir-OST0000.readcache_max_filesize osd-ldiskfs.fir-OST0000.readcache_max_filesize=18446744073709551615 [root@fir-io1-s1 ~]# lctl set_param osd-ldiskfs.fir-OST0000.readcache_max_filesize=32M osd-ldiskfs.fir-OST0000.readcache_max_filesize=32M [root@fir-io1-s1 ~]# lctl get_param osd-ldiskfs.fir-OST0000.readcache_max_filesize osd-ldiskfs.fir-OST0000.readcache_max_filesize=33554432 </pre> </div></div> <p>So it is ldiskfs-specific? just curious, is this option available with ZFS backend?</p> <p>It's available on ZFS as well, yeah.  (In general, ZFS caching isn't quite as controllable as the ldiskfs sort, so not all the options are there...  But this is.)</p> <p>Thanks again Patrick, that sounds good! I would recommend to update the Lustre manual or at least add a note that it has moved to the osd backend in 2.12 to avoid any confusion.</p> <p>Opened <a href="https://jira.whamcloud.com/browse/LUDOC-457" title="readcache max file size moved in 2.12.x and newer" class="issue-link" data-issue-key="LUDOC-457"><del>LUDOC-457</del></a> to track updating the manual.</p> <p><del>Neil Brown (neilb@suse.de) uploaded a new patch:</del> <a href="https://review.whamcloud.com/39124" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39124</a><br/> <del>Subject: <a href="https://jira.whamcloud.com/browse/LU-12768" title="readcache_max_filesize in 2.12?" class="issue-link" data-issue-key="LU-12768"><del>LU-12768</del></a> o2iblnd: wait properly for fps</del>&gt;increasing.-<br/> <del>Project: fs/lustre-release</del><br/> <del>Branch: master</del><br/> <del>Current Patch Set: 1</del><br/> <del>Commit: d17be980c1f249e2c7c1787c79fbce1e64b44187</del></p> <p>Should be <a href="https://jira.whamcloud.com/browse/LU-12678" title="LNet simplification work from linux client" class="issue-link" data-issue-key="LU-12678">LU-12678</a>.</p> <p><del>Oleg Drokin (green@whamcloud.com) merged in patch</del> <a href="https://review.whamcloud.com/39124/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39124/</a><br/> <del>Subject: <a href="https://jira.whamcloud.com/browse/LU-12768" title="readcache_max_filesize in 2.12?" class="issue-link" data-issue-key="LU-12768"><del>LU-12768</del></a> o2iblnd: wait properly for fps</del>&gt;increasing.-<br/> <del>Project: fs/lustre-release</del><br/> <del>Branch: master</del><br/> -Current Patch Set: -<br/> <del>Commit: 530eca31556f7708781bcd1b1809ae286aee4c57</del></p> <p>Should be <a href="https://jira.whamcloud.com/browse/LU-12678" title="LNet simplification work from linux client" class="issue-link" data-issue-key="LU-12678">LU-12678</a>.</p> Related LUDOC-457 Development Rank 1|i00mt3: Rank (Obsolete) 9223372036854775807 Severity