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-7109 Lustre <p>Old IDIF used "0" as the OST index, that may cause compatibility issues when update. There is switch inside osd-ldiskfs for controlling whether convert old IDIF to new one. Once the real OST index became part of the IDIF and stored on disk (in LMA EA), then the OST cannot be downgraded.</p> <p>Because the conversion switch is inside osd-ldiskfs, the LFSCK should not update the IDIF-in-LMA, instead, leave it to be handled by OSD to avoid downgrading trouble.</p> LU-7109

Update OST-index in IDIF inside osd-ldiskfs

Bug Minor Resolved Fixed nasf nasf Sat, 5 Sep 2015 13:37:22 +0000 Thu, 12 May 2016 18:44:01 +0000 Wed, 28 Oct 2015 15:30:02 +0000 Lustre 2.8.0 0 5 <p>Fan Yong (fan.yong@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/16282" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16282</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7109" title="Update OST-index in IDIF inside osd-ldiskfs" class="issue-link" data-issue-key="LU-7109"><del>LU-7109</del></a> lfsck: update OST-index in IDIF inside OSD<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 2<br/> Commit: de716e1c8c5daba240ef320f52cf5c5cfbf41ace</p> <p>Fan Yong, what is the impact of this bug? Does the OSS or LFSCK crash or hang without the patch? Is there memory corruption?</p> <p>It is the OST's duty to decide whether the OST index is finally stored inside the IDIF-in-LMA, similar as "dirdata" feature. Once the feature of "OST index in IDIF-in-LMA" is enabled, then the on-disk format will be changed, and then the OST cannot be downgraded to old version. Current LFSCK will store the OST index in IDIF and update the LMA by force, such improper behaviour will affect the downgrade. As for memory corruption, I do NOT think there is any relationship.</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/16282/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16282/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7109" title="Update OST-index in IDIF inside osd-ldiskfs" class="issue-link" data-issue-key="LU-7109"><del>LU-7109</del></a> lfsck: update OST-index in IDIF inside OSD<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 140b897187cdbbdbc593b85dbb8a3322a9c28c9c</p> <p>Landed for 2.8</p> Related Development Rank 1|hzxmrj: Rank (Obsolete) 9223372036854775807 Severity