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
