bit 21 in the features bitmap is upmap support Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Mon, Apr 13, 2020 at 11:53 AM Frank Schilder <frans@xxxxxx> wrote: > > Dear all, > > I would like to enable the balancer on a mimic 13.2.8 cluster in upmap mode. Unfortunately, I have a lot of ceph fs kernel clients that report their version as jewel, but might already support upmap. The ceph client kernel module received already a lot of back-ports and supports features of later ceph versions, for example, quotas. I guess they report back jewel, because not all luminous/mimic features are back-ported yet. Is there a way to check if a client supports upmap? > > Here some info: > > [root@gnosis ~]# ceph features > { > [...] > "client": [ > { > "features": "0x27018fb86aa42ada", > "release": "jewel", > "num": 1676 > }, > { > "features": "0x2f018fb86aa42ada", > "release": "luminous", > "num": 1 > }, > { > "features": "0x3ffddff8ffacfffb", > "release": "luminous", > "num": 167 > } > ], > > The fs clients are the top two entries, the third entry is rbd clients. Note that the feature key for the fs clients is almost identical. Here a snippet from mds session ls for one such jewel client: > > { > "id": 25641514, > "num_leases": 0, > "num_caps": 1, > "state": "open", > "request_load_avg": 0, > "uptime": 588563.550276, > "replay_requests": 0, > "completed_requests": 0, > "reconnecting": false, > "inst": "client.25641514 192.168.57.124:0/3398308464", > "client_metadata": { > "features": "00000000000000ff", > "entity_id": "con-fs2-hpc", > "hostname": "sn253.hpc.ait.dtu.dk", > "kernel_version": "3.10.0-957.12.2.el7.x86_64", > "root": "/hpc/groups" > } > } > > Since I would like to use upmap right from the beginning, my alternative is to re-weight a few of the really bad outliers manually to simplify changing back. > > What would you suggest? > > Thanks and best regards, > > ================= > Frank Schilder > AIT Risø Campus > Bygning 109, rum S14 > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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