Dear Elis,Thank you for your precise analysis and report that perfectly helps
to understand the issue.I'm quite surprised the llapi_hsm_get_state triggers a
changelog event, given it is supposed to be a read-only action. Do you have a
way to request some support about that to your lustre support?If you don't have
a filesystem with too many entries (<100M), a possible workaround could be to
disable changelogs (or at least the close event) for the time of the import,
and then scan the filesystem after the import.Thank you for keeping us
updated.Thomas
-------- Message d'origine --------De : Ellis Wilson via robinhood-support
<robinhood-support@lists.sourceforge.net> Date : 02/06/2022 23:01 (GMT+01:00)
À : robinhood-support@lists.sourceforge.net Objet : [robinhood-support]
Infinite llapi_hsm_state_get Calls Hi all,I noticed on my Lustre 2.14.0 cluster
running Robinhood 3.1.5 that my changelogs were never reaching zero.It appears
that files that are imported from a backing archive, but are not modified or
removed from the backing archive (i.e., never reach new or modified in lhsm
parlance), go in a loop of the following:1. RBH sees close associated with the
import event or a subsequent open/read/close sequence.2. RBH determines that
since the file is not already in new or modified states, it must get a fresh
llapi_hsm_get_state to see if it changed. This appears to occur on CLOSE
event.3. llapi_hsm_get_state does an open/ioctl/close, throwing another close
on the tail of the CL queue.4. RBH clears the just processed close from the CL,
but the new one persists.5. Rinse and repeat starting at 2.If 1M files are
imported, the changelog remains at roughly 2M entries (one open and one close
per file), though it's constantly being rototilled by
RBH.Thoughts?ellis_______________________________________________robinhood-support
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