diff options
| author | Xiubo Li <xiubli@redhat.com> | 2019-11-26 07:24:21 -0500 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2020-01-27 16:53:39 +0100 |
| commit | 4d7ace02ba5c6ef1f8eeb32a86fef7c528bd7f36 (patch) | |
| tree | 3fba3723f15ecba9f21dc00492d91adec9cfdd28 /include/linux | |
| parent | d80865bff5201cc56bc247989ebbab6169b3a101 (diff) | |
ceph: fix mdsmap cluster available check based on laggy number
In case the max_mds > 1 in MDS cluster and there is no any standby
MDS and all the max_mds MDSs are in up:active state, if one of the
up:active MDSs is dead, the m->m_num_laggy in kclient will be 1.
Then the mount will fail without considering other healthy MDSs.
There manybe some MDSs still "in" the cluster but not in up:active
state, we will ignore them. Only when all the up:active MDSs in
the cluster are laggy will treat the cluster as not be available.
In case decreasing the max_mds, the cluster will not stop the extra
up:active MDSs immediately and there will be a latency. During it
the up:active MDS number will be larger than the max_mds, so later
the m_info memories will 100% be reallocated.
Here will pick out the up:active MDSs as the m_num_mds and allocate
the needed memories once.
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ceph/mdsmap.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/ceph/mdsmap.h b/include/linux/ceph/mdsmap.h index 0067d767c9ae..3a66f4f926ce 100644 --- a/include/linux/ceph/mdsmap.h +++ b/include/linux/ceph/mdsmap.h @@ -25,8 +25,9 @@ struct ceph_mdsmap { u32 m_session_timeout; /* seconds */ u32 m_session_autoclose; /* seconds */ u64 m_max_file_size; - u32 m_max_mds; /* size of m_addr, m_state arrays */ - int m_num_mds; + u32 m_max_mds; /* expected up:active mds number */ + int m_num_active_mds; /* actual up:active mds number */ + int m_num_mds; /* size of m_info array */ struct ceph_mds_info *m_info; /* which object pools file data can be stored in */ |