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-10482 Lustre <p>Enhance "lfs find" to add the following mirror related search options:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[!] --mirror-count|-N [+-]&lt;mirror_cnt&gt; </pre> </div></div> <p>Number of mirrors.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[!] --file-state &lt;file_state&gt; </pre> </div></div> <p>State of a mirrored file.<br/> A mirrored file can be one of the following states:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>RDONLY - the mirrored file is in read only state, all of the mirrors contain the up-to-date data; WRITE_PENDING - the mirrored file is being written; SYNC_PENDING - the mirrored file is being resynchronized. </pre> </div></div> <p>The user-friendly file state names would be "ro", "write" and "sync".</p> LU-10482

enhance "lfs find" to add mirror related search options

Improvement Minor Resolved Fixed Jian Yu Jian Yu FLR2 Wed, 10 Jan 2018 08:46:15 +0000 Wed, 14 Feb 2018 05:42:02 +0000 Wed, 14 Feb 2018 02:29:32 +0000 Lustre 2.11.0 0 5 <p>For the "states", are these encoded as component flags? In that case, the handling should just be implemented via <tt>lfs find --comp-flags=rdonly</tt> or similar.</p> <p>It's about file state, instead of state for individual components.</p> <p>Where is this state stored? If in LMA, then we might also use this to prevent access from 2.10 clients? If STALE is in incompat LMA flags, then this prevents 2.10 MDS from accessing a mirrored file to prevent it from allowing a 2.10 client to modify it. </p> <p>It's stored in the layout, the lowest 2 bits of <tt>lov_comp_md_v1::lcm_flags</tt>. There is a field in the layout to record the current number of mirrors, and I used that to decide if this is a mirrored file, and then prevent 2.10 clients from accessing it.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">/** * on-disk data <span class="code-keyword">for</span> lcm_flags. Valid <span class="code-keyword">if</span> lcm_magic is LOV_MAGIC_COMP_V1. */ <span class="code-keyword">enum</span> lov_comp_md_flags { <span class="code-comment">/* the least 2 bits are used by FLR to record file state */</span> LCM_FL_NOT_FLR = 0, LCM_FL_RDONLY = 1, LCM_FL_WRITE_PENDING = 2, LCM_FL_SYNC_PENDING = 3, LCM_FL_FLR_MASK = 0x3, }; </pre> </div></div> <p>Jian Yu (jian.yu@intel.com) uploaded a new patch: <a href="https://review.whamcloud.com/31069" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/31069</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10482" title="enhance &quot;lfs find&quot; to add mirror related search options" class="issue-link" data-issue-key="LU-10482"><del>LU-10482</del></a> flr: enhance "lfs find" to add mirror options<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: fe971eaec046fe873cb30ee593202970e7869d7d</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/31069/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/31069/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10482" title="enhance &quot;lfs find&quot; to add mirror related search options" class="issue-link" data-issue-key="LU-10482"><del>LU-10482</del></a> flr: enhance "lfs find" to add mirror options<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 8cb239805699e925dae594bc82379f0caa43b491</p> Related LU-5170 Development Rank 1|hzzqsf: Rank (Obsolete) 9223372036854775807