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-13850 Lustre <p> </p> <p>file was created on one node and on that node was created rule to add file to cache.</p> <p>lctl pcc add /mnt/lustre /mnt/pccro --param "fname={*.doc} roid=7 ropcc=1"</p> <p> </p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> pdsh -w trevis-59vm1[0,1,2] lfs pcc state /mnt/lustre/myfile.doc trevis-59vm12: file: /mnt/lustre/myfile.doc, type: readwrite, PCC file: /0007/0000/0402/0000/0002/0000/0x200000402:0x7:0x0, user number: 0, flags: 0 trevis-59vm10: file: /mnt/lustre/myfile.doc, type: none trevis-59vm11: file: /mnt/lustre/myfile.doc, type: none </pre> </div></div> <p>on attempt to read file from other nodes I seeing this error.  and file type is marked as readwrite. Epected output is readonly.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> pdsh -w trevis-59vm1[0,1,2] cat /mnt/lustre/myfile.doc trevis-59vm11: cat: /mnt/lustre/myfile.doc: No data available trevis-59vm12: filedata trevis-59vm10: cat: /mnt/lustre/myfile.doc: No data available </pre> </div></div> <p>Last time when I was checked this it works successfully file showed  status</p> <p> </p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> # pdsh -w trevis-59vm1[0,1,2] /usr/sbin/lctl pcc list /mnt/lustre | dshbak ---------------- trevis-59vm10 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} ---------------- trevis-59vm11 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} ---------------- trevis-59vm12 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} </pre> </div></div> <p> </p> LU-13850

File in readwrite state and "No data available" error after file was added to cache on one node.

Bug Major Closed Fixed Qian Yingjin Vikentsi Lapa Mon, 3 Aug 2020 17:30:06 +0000 Tue, 4 Aug 2020 14:39:41 +0000 Tue, 4 Aug 2020 14:39:41 +0000 Lustre 2.14.0 0 3 <p>Yingjin, </p> <p>Would you please review this issue and comment?</p> <p>Could you please give out the full command lines that caused this errors?</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> pdsh -w trevis-59vm1[0,1,2] lfs pcc state /mnt/lustre/myfile.doc trevis-59vm12: file: /mnt/lustre/myfile.doc, type: readwrite, PCC file: /0007/0000/0402/0000/0002/0000/0x200000402:0x7:0x0, user number: 0, flags: 0 </pre> </div></div> <p>How the file become PCC-RW (readwrite) state?</p> <p> </p> <p>Thanks,</p> <p>Qian</p> <p> </p> <p>I reproduced the failure on my local machine.</p> <p>Will update the patch soon.</p> <p> </p> <p>Thanks,</p> <p>Qian</p> <p>Fix this bug in <a href="https://review.whamcloud.com/#/c/38346/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/38346/</a> <br/> <a href="https://jira.whamcloud.com/browse/LU-10918" title="Configurable rule based auto PCC caching for newly created files" class="issue-link" data-issue-key="LU-10918">LU-10918</a> pcc: auto RO-PCC caching when O_RDONLY open files</p> <p>Please try the topmost patch:<br/> <a href="https://review.whamcloud.com/#/c/38352" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/38352</a> <br/> <a href="https://jira.whamcloud.com/browse/LU-12373" title="detach and delete the PCC cached files when remove a PCC backend from a client" class="issue-link" data-issue-key="LU-12373">LU-12373</a> pcc: uncache the pcc copies when remove a PCC backend</p> <p>Thank you, I started to test it.</p> <p>Confirmation that bug was fixed.  Verification was done for lustre-2.13.55_3_g066eec1-1.el7.x86_64 version. </p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> [root@trevis-59vm9 tests]# pdsh -w trevis-59vm[10-12] bash /mnt/lustre/check_ro_cache.sh | dshbak ---------------- trevis-59vm10 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} ---------------- trevis-59vm11 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} ---------------- trevis-59vm12 ---------------- pcc: - pccpath: /mnt/pccro hsmtool: posix rwid: 0 roid: 7 flags: 2e autocache: fname={*.doc} [root@trevis-59vm9 tests]# echo “YYYYY” &gt; /mnt/lustre/fileabcd.doc [root@trevis-59vm9 tests]# pdsh -w trevis-59vm[10-12] lfs pcc state /mnt/lustre/fileabcd.doc trevis-59vm12: file: /mnt/lustre/fileabcd.doc, type: readonly, PCC file: /002e/0000/0401/0000/0002/0000/0x200000401:0x2e:0x0, user number: 0, flags: 0 trevis-59vm10: file: /mnt/lustre/fileabcd.doc, type: readonly, PCC file: /002e/0000/0401/0000/0002/0000/0x200000401:0x2e:0x0, user number: 0, flags: 0 trevis-59vm11: file: /mnt/lustre/fileabcd.doc, type: readonly, PCC file: /002e/0000/0401/0000/0002/0000/0x200000401:0x2e:0x0, user number: 0, flags: 0 </pre> </div></div> <p>Verified with lustre-client-2.13.55_3_g066eec1-1.el7.x86_64</p> Development Rank 1|i016vb: Rank (Obsolete) 9223372036854775807 Severity