Hi Scott, Scott Nolin via robinhood-support <[email protected]> writes:
> 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. We have also experienced this and are currently no longer using Robinhood for this reason. What do you do if the monitoring does detect that the changelog is becoming to large? Cheers, Loris > Scott > > -----Original Message----- > From: Rémi Palancher <[email protected]> > Sent: Thursday, January 12, 2023 3:25 AM > To: [email protected] > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/robinhood-support > > _______________________________________________ > robinhood-support mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/robinhood-support -- Dr. Loris Bennett (Herr/Mr) ZEDAT, Freie Universität Berlin _______________________________________________ robinhood-support mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/robinhood-support
