Hello Lei, On Thu, Oct 17, 2019 at 8:43 PM Lei Liu <liul.stone@xxxxxxxxx> wrote: > > Hi cephers, > > We have some ceph clusters use cephfs in production(mount with kernel cephfs), but several of clients often keep a lot of caps（millions） unreleased. > I know this is due to the client's inability to complete the cache release, errors might have been encountered, but no logs. > > client kernel version is 3.10.0-957.21.3.el7.x86_64 > ceph version is mostly v12.2.8 > > ceph status shows: > > x clients failing to respond to cache pressure > > client kernel debug shows: > > # cat /sys/kernel/debug/ceph/a00cc99c-f9f9-4dd9-9281-43cd12310e41.client11291811/caps > total 23801585 > avail 1074 > used 23800511 > reserved 0 > min 1024 > > mds config: > [mds] > mds_max_caps_per_client = 10485760 > # 50G > mds_cache_memory_limit = 53687091200 > > I want to know if some ceph configurations can solve this problem ？ mds_max_caps_per_client is new in Luminous 12.2.12. See [1]. You need to upgrade. [1] https://tracker.ceph.com/issues/38130 -- Patrick Donnelly, Ph.D. He / Him / His Senior Software Engineer Red Hat Sunnyvale, CA GPG: 19F28A586F808C2402351B93C3301A3E258DD79D _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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