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-17090 Lustre <p><a href="https://jira.whamcloud.com/browse/LU-12346" title="ladvise willread should work even if OSD cache is disabled" class="issue-link" data-issue-key="LU-12346"><del>LU-12346</del></a> noted this issue, but I think sort of skipped actually closing to a solution.</p> <p>Today, when WILLREAD advise is given, ladvise_prefetch reads in to the thread big cache.  If this cache is not page cache pages, this is a waste of time, since it's not used for subsequent reads.  We should just not do anything if the buffer is not from the page cache.</p> <p> </p> <p>Note that compression will also use this, so we'll also need an option to force reads to a local buffer.</p> LU-17090

ladvise willread and OSD cache

Improvement Minor Open Unresolved Patrick Farrell Patrick Farrell Tue, 5 Sep 2023 16:18:02 +0000 Tue, 5 Sep 2023 16:23:47 +0000 0 1 <p>This is pretty minor, I just wanted to note this.  It's just a case where WILLREAD will waste effort on the server if the page cache is being bypassed.  Worth fixing but not serious.</p> Development Rank 1|i03upz: Rank (Obsolete) 9223372036854775807 Severity