On Mon, Jan 8, 2018 at 8:02 PM, Marc Roos <m.r...@f1-outsourcing.eu> wrote: > > I guess the mds cache holds files, attributes etc but how many files > will the default "mds_cache_memory_limit": "1073741824" hold?
We always used to get asked how much memory a given mds_cache_size (in inodes) would require, I guess it was only a matter of time until the reverse question was asked :-) John > > > -----Original Message----- > From: Stefan Kooman [mailto:ste...@bit.nl] > Sent: vrijdag 5 januari 2018 12:54 > To: Patrick Donnelly > Cc: Ceph Users > Subject: Re: [ceph-users] MDS cache size limits > > Quoting Patrick Donnelly (pdonn...@redhat.com): >> >> It's expected but not desired: http://tracker.ceph.com/issues/21402 >> >> The memory usage tracking is off by a constant factor. I'd suggest >> just lowering the limit so it's about where it should be for your >> system. > > Thanks for the info. Yeah, we did exactly that (observe and adjust > setting accordingly). Is this something worth mentioning in the > documentation? Escpecially when this "factor" is a constant? Over time > (with issue 21402 being worked on) things will change. Ceph operators > will want to make use of as much cache as possible without > overcommitting (MDS won't notice until there is no more memory left, > restart, and looses all its cache :/). > > Gr. Stefan > > -- > | BIT BV http://www.bit.nl/ Kamer van Koophandel 09090351 > | GPG: 0xD14839C6 +31 318 648 688 / i...@bit.nl > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
