[ceph-users] CephFS kernel client versions - pg-upmap

Ilya Dryomov idryomov at gmail.com
Mon Nov 5 01:40:26 PST 2018

On Sat, Nov 3, 2018 at 10:41 AM <jesper at krogh.cc> wrote:
> Hi.
> I tried to enable the "new smart balancing" - backend are on RH luminous
> clients are Ubuntu 4.15 kernel.
> As per: http://docs.ceph.com/docs/mimic/rados/operations/upmap/
> $ sudo ceph osd set-require-min-compat-client luminous
> Error EPERM: cannot set require_min_compat_client to luminous: 1 connected
> client(s) look like firefly (missing 0xe01000000200000); 1 connected
> client(s) look like firefly (missing 0xe01000000000000); 1 connected
> client(s) look like hammer (missing 0xe00000000200000); 55 connected
> client(s) look like jewel (missing 0x800000000000000); add
> --yes-i-really-mean-it to do it anyway
> ok, so 4.15 kernel connects as a "hammer" (<1.0) client?  Is there a
> huge gap in upstreaming kernel clients to kernel.org or what am I
> misreading here?
> Hammer is 2015'ish - 4.15 is January 2018'ish?
> Is kernel client development lacking behind ?

Hi Jesper,

There are four different groups of clients in that output.  Which one
of those four is the kernel client?  Are you sure it's just the hammer



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