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-12759 Lustre <p>Impossible to set <tt>osc.&#42;.grant_shrink</tt> to 0 , it gets reset to 1 after OST reconnect, regardless whether it was simple set by <tt>lctl set_param</tt> or <tt>lctl set_param -P</tt>.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@devvm1 tests]# ../utils/lctl get_param osc.*.grant_shrink osc.lustre-OST0000-osc-ffff880043e43800.grant_shrink=1 osc.lustre-OST0001-osc-ffff880043e43800.grant_shrink=1 [root@devvm1 tests]# ../utils/lctl set_param osc.*.grant_shrink=0 osc.lustre-OST0000-osc-ffff880043e43800.grant_shrink=0 osc.lustre-OST0001-osc-ffff880043e43800.grant_shrink=0 </pre> </div></div> <p>wait some time for idle OSTs get disconnected,<br/> then write to files to get the OSTs connected again:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@devvm1 tests]# dd if=/dev/zero bs=1M count=1 of=/mnt/lustre/foo1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00950013 s, 110 MB/s [root@devvm1 tests]# dd if=/dev/zero bs=1M count=1 of=/mnt/lustre/foo2 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0131701 s, 79.6 MB/s </pre> </div></div> <p>Now the previous settings are gone:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@devvm1 tests]# ../utils/lctl get_param osc.*.grant_shrink osc.lustre-OST0000-osc-ffff880043e43800.grant_shrink=1 osc.lustre-OST0001-osc-ffff880043e43800.grant_shrink=1 [root@devvm1 tests]# </pre> </div></div> LU-12759

parameter grant_shrink gets reset to 1 after client reconnects

Bug Minor Resolved Fixed Alexander Zarochentsev Alexander Zarochentsev Fri, 13 Sep 2019 15:43:46 +0000 Fri, 17 Jan 2020 22:58:16 +0000 Tue, 12 Nov 2019 06:34:38 +0000 Lustre 2.14.0 Lustre 2.12.4 0 3 <p>Alexander Zarochentsev (c17826@cray.com) uploaded a new patch: <a href="https://review.whamcloud.com/36177" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/36177</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12759" title="parameter grant_shrink gets reset to 1 after client reconnects" class="issue-link" data-issue-key="LU-12759"><del>LU-12759</del></a> osc: don't re-enable grant shrink on reconnect<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: a1a723ce63dab1cf3e0305ee3556eaa308655f0b</p> <p>with the fix grant shrinking remaining disabled after reconnecting to OSTs:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@devvm1 tests]# ../utils/lctl get_param osc.*.grant_shrink osc.lustre-OST0000-osc-ffff880045d29800.grant_shrink=1 osc.lustre-OST0001-osc-ffff880045d29800.grant_shrink=1 [root@devvm1 tests]# ../utils/lctl set_param osc.*.grant_shrink=0 osc.lustre-OST0000-osc-ffff880045d29800.grant_shrink=0 osc.lustre-OST0001-osc-ffff880045d29800.grant_shrink=0 [root@devvm1 tests]# ../utils/lctl get_param osc.*.grant_shrink osc.lustre-OST0000-osc-ffff880045d29800.grant_shrink=0 osc.lustre-OST0001-osc-ffff880045d29800.grant_shrink=0 [root@devvm1 tests]# dmesg | tail [14492.674788] Lustre: lustre-OST0001: new disk, initializing [14494.139279] Lustre: lustre-MDT0000: Connection restored to f7ad677a-8d53-4 (at 192.168.56.101@tcp) [14494.139286] Lustre: Skipped 6 previous similar messages [14494.168439] Lustre: Mounted lustre-client [14495.540432] Lustre: DEBUG MARKER: Using TIMEOUT=20 [14502.268274] Lustre: lustre-OST0001: Connection restored to f7ad677a-8d53-4 (at 192.168.56.101@tcp) [14502.268282] Lustre: Skipped 3 previous similar messages [14502.286601] Lustre: ctl-lustre-MDT0000: super-sequence allocation rc = 0 [0x00000002c0000400-0x0000000300000400]:1:ost [14502.286799] Lustre: cli-lustre-OST0001-super: Allocated super-sequence [0x00000002c0000400-0x0000000300000400]:1:ost] [14517.305391] Lustre: lustre-OST0000-osc-ffff880045d29800: disconnect after 22s idle [root@devvm1 tests]# dd if=/dev/zero bs=1M count=1 of=/mnt/lustre/foo1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0110673 s, 94.7 MB/s [root@devvm1 tests]# dd if=/dev/zero bs=1M count=1 of=/mnt/lustre/foo2 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.014042 s, 74.7 MB/s [root@devvm1 tests]# dmesg | tail [14495.540432] Lustre: DEBUG MARKER: Using TIMEOUT=20 [14502.268274] Lustre: lustre-OST0001: Connection restored to f7ad677a-8d53-4 (at 192.168.56.101@tcp) [14502.268282] Lustre: Skipped 3 previous similar messages [14502.286601] Lustre: ctl-lustre-MDT0000: super-sequence allocation rc = 0 [0x00000002c0000400-0x0000000300000400]:1:ost [14502.286799] Lustre: cli-lustre-OST0001-super: Allocated super-sequence [0x00000002c0000400-0x0000000300000400]:1:ost] [14517.305391] Lustre: lustre-OST0000-osc-ffff880045d29800: disconnect after 22s idle [14542.047684] Lustre: lustre-OST0000-osc-ffff880045d29800: reconnect after 25s idle [14542.047940] Lustre: lustre-OST0000: Connection restored to f7ad677a-8d53-4 (at 192.168.56.101@tcp) [14542.047944] Lustre: Skipped 1 previous similar message [14543.718663] Lustre: lustre-OST0001-osc-ffff880045d29800: reconnect after 26s idle [root@devvm1 tests]# ../utils/lctl get_param osc.*.grant_shrink osc.lustre-OST0000-osc-ffff880045d29800.grant_shrink=0 osc.lustre-OST0001-osc-ffff880045d29800.grant_shrink=0 [root@devvm1 tests]# </pre> </div></div> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/36177/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/36177/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12759" title="parameter grant_shrink gets reset to 1 after client reconnects" class="issue-link" data-issue-key="LU-12759"><del>LU-12759</del></a> osc: don't re-enable grant shrink on reconnect<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: efa3425c5f5a6763ea834408b982e4df5a90c914</p> <p>Landed for 2.14</p> <p>Minh Diep (mdiep@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/37152" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/37152</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12759" title="parameter grant_shrink gets reset to 1 after client reconnects" class="issue-link" data-issue-key="LU-12759"><del>LU-12759</del></a> osc: don't re-enable grant shrink on reconnect<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: 1<br/> Commit: 270fd0dc37e83fb19ccde7db1dfd197cd20d5c0a</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/37152/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/37152/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12759" title="parameter grant_shrink gets reset to 1 after client reconnects" class="issue-link" data-issue-key="LU-12759"><del>LU-12759</del></a> osc: don't re-enable grant shrink on reconnect<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: <br/> Commit: 9ede55bc906fd033ccb9f40fb0a6a625e836bef3</p> Related LU-12120 Development Rank 1|i00mqv: Rank (Obsolete) 9223372036854775807 Severity