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-14679 Lustre <p><a href="https://jira.whamcloud.com/browse/LU-8465" title="parallel e2fsck performance at scale" class="issue-link" data-issue-key="LU-8465"><del>LU-8465</del></a> implemented parallel inode table scanning for e2fsck pass1, and parallel bitmap loading for e2fsck pass5.</p> <p>After these improvements, e2fsck of a 50% full 1PB filesystem running with 256 threads improved pass1 from 7777s to 191s (40x faster), and pass5 from 10523s to 286s (36x faster). </p> <p>However, pass2 only improved marginally, from 1363s to 1265s (7%) and this now dominates the total e2fsck runtime (70% in this test) on large OSTs, and limits the aggregate speedup of e2fsck to "only" 10x faster despite the other improvements.</p> <p>Processing directories in parallel should also be possible, in order to further speed up e2fsck times on large OSTs, and expecially on large MDT filesystems.</p> LU-14679

parallel e2fsck for pass2 directory scanning

Improvement Minor Resolved Duplicate WC Triage Andreas Dilger e2fsck Tue, 11 May 2021 09:23:23 +0000 Thu, 2 Dec 2021 19:40:42 +0000 Thu, 2 Dec 2021 19:40:42 +0000 Lustre 2.14.0 0 2 Duplicate LU-14894 Related LU-8465 Development Rank 1|i01u7j: Rank (Obsolete) 9223372036854775807