On Mon, May 15, 2017 at 10:40 AM, Ranjan Ghosh <ghosh@xxxxxx> wrote: > Hi all, > > When I run "ceph daemon mds.<name> session ls" I always get a fairly large > number for num_caps (200.000). Is this normal? I thought caps are sth. like > open/locked files meaning a client is holding a cap on a file and no other > client can access it during this time. Capabilities are much broader than that, they cover clients keeping some fresh metadata in their cache, even if the client isn't doing anything with the file at that moment. It's common for a client to accumulate a large number of capabilities in normal operation, as it keeps the metadata for many files in cache. You can adjust the "client cache size" setting on the fuse client to encourage it to cache metadata on fewer files and thereby hold onto fewer capabilities if you want. John > How can I debug this if it is a cause > of concern? Is there any way to debug on which files the caps are held > excatly? > > Thank you, > > Ranjan > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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