Hi
Grateful if someone could clarify some things about CephFS Scrubs:
1) Am I right that a command such as "ceph tell mds.cephfs:0 scrub start
/ recursive" only triggers a forward scrub (not a backward scrub)?
2) I couldn't find any reference to forward scrubs being done
automatically and was wondering whether I should do them using cron? But
then I saw an undated (but I think a little elderly) presentation by
Greg Farnum that states that "forward scrub...runs continuously in the
background". Is that still correct (for Quincy), and if so what controls
the frequency?
3) Are backward scrubs always manual, using the 3 cephfs-data-scan phases?
4) Are regular backward scrubs recommended, or only if there is
indication of a problem? (With due regard to the amount of time they may
take...)
Thanks for any advice.
Regards, Chris
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