FYI LU-14699 in 2.15 implements a garbage collection for changelog which should address this case.
On Thu, Jan 12, 2023, 10:22 AM Scott Nolin via robinhood-support < robinhood-support@lists.sourceforge.net> wrote: > We have not looked at changelog performance impact (for us, likely does > not matter), but we do have to monitor the changelog size as we've had > issues where if there is something (typically a bad script) causing enough > metadata activity and robinhood can't keep up and they can grow too large. > > Scott > > -----Original Message----- > From: Rémi Palancher <r...@rackslab.io> > Sent: Thursday, January 12, 2023 3:25 AM > To: robinhood-support@lists.sourceforge.net > Subject: [robinhood-support] Feedback on RobinHood > > Hi RobinHood developpers and users, > > I am studying with EDF the opportunity to deploy RobinHood on their HPC > clusters running Lustre 2.12. > > We are particularly interested on any feedback about: > > - The impact on filesystem performances of the activation of Lustre > changelog with default event mask [0]? Does anyone has numbers to share? > > - The current state of Lustre PFL support? The last "RobinHood Project > Update" slides available in the wiki from 2017 [1] say « no PFL support for > now » but commit in 2019 mentions a « workaround to support PFL » [2]. I > must admit I am not an experienced Lustre expert and I don't fully > understand the comment « It only stores and handles the striping > information of the last initialized component of a layout, which is likely > the one suited for the current file size. » What are the caveats and the > limits of the current workaround? > > - The roadmap for v4? I saw these slides from LAD'22 that mentions tests > in 2023. Do you plan any release this year? > > Thank you in advance for any kind of answer! > > Best regards, > > [0] > https://github.com/cea-hpc/robinhood/blob/master/scripts/rbh-config#L298 > [1] > https://robinhood.sourceforge.net/rug17/RUG17-ThomasLeibovici-ProjectUpdate.pdf > [2] > https://github.com/cea-hpc/robinhood/commit/7ba46d66970d476d25e3890848592c0c5979b666 > [3] > https://www.eofs.eu/_media/events/lad22/1.7-rbh4_update_sebastiengougeaud.pdf > > -- > Rémi Palancher > Rackslab: Open Source Solutions for HPC Operations https://rackslab.io > > > _______________________________________________ > robinhood-support mailing list > robinhood-support@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/robinhood-support > > _______________________________________________ > robinhood-support mailing list > robinhood-support@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/robinhood-support >
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