Hi Janek, Quoting Janek Bevendorff (janek.bevendorff@uni-weimar.de):
Hey Patrick,
I just wanted to give you some feedback about how 14.2.5 is working for me. I've had the chance to test it for a day now and overall, the experience is much better, although not perfect (perhaps far from it).
I have two active MDS (I figured that'd spread the meta data load a little and seems to work pretty well for me). After the upgrade to the new release, I removed all special recall settings, so my MDS config is basically on default. The only thing I set is a mds_max_caps_per_client of 200k, a mds_cache_reservation of 0.1 and 40G of mds_cache_memory_limit.
Have you already tried to adjust the "mds_cache_memory_limit" and or "ceph tell mds.* cache drop"? I really wonder how the MDS copes with that with milions of CAPS. Gr. Stefan -- | BIT BV https://www.bit.nl/ Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / info@bit.nl