On 13/01/20 19:09, Darrick J. Wong wrote:
xfs_io -c 'bmap -c -e -l -p -v <whatever>' test.img
Ok, good to know. Thanks.
If you are interested in online scrub, then I'd say yes because it's the secret sauce that gives online metadata checking most of its power. I confess, I haven't done a lot of performance analysis of rmap lately, the metadata ops overhead might still be in the ~10% range. The two issues preventing rmap from being turned on by default (at least in my head) are (1) scrub itself is still EXPERIMENTAL and (2) it's not 100% clear that online fsck is such a killer app that everyone will want it, since you always pay the performance overhead of enabling rmap regardless of whether you use xfs_scrub.
Well, I really think online scrub, when ready, will be a killer feature. So, for a "mere" 10% performance penalty, I would enable rbmap unless a concrete chance to expose some bug exists.
Thanks. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx GPG public key ID: FF5F32A8
