Hi,
in this thread [1] Dan gives very helpful points to consider regarding
multi-active MDS. Are you sure you need that?
One of our customers has tested such a setup extensively with
directory pinning because the MDS balancer couldn't handle the high
client load. In order to better utilize the MDS servers (only one
thread) they ran multiple daemons per server which also worked quite
well. The only issue is the rolling upgrade where you need to reduce
the max_mds to 1 which doesn't work here. But this is all still in
Nautilus.
[1]
https://lists.ceph.io/hyperkitty/list/ceph-users@xxxxxxx/message/4LNXN6U5DTB2BFPBDGDUKTEB4THD7HCH/
Zitat von huxiaoyu@xxxxxxxxxxxx:
Dear Cephers,
On reading a technical blog from Croit:
https://croit.io/blog/ceph-performance-test-and-optimization
It says the following: "It should be noted that it is still debated
whether a configuration with multiple active MDS servers is OK for
production Ceph clusters."
Just wonder whether multiple active MDS servers is OK for production
Ceph clusters OR Not? Does any one has practical lessons ? Can some
one share more stories with us, whether success or failure
Thanks a lot in advance,
samuel
huxiaoyu@xxxxxxxxxxxx
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