Hi all，
There are two mds in the ceph cluster，one is active and the other is
standby. In my test, I found the mds0 was marked as laggy, and it
was taken over by the standby soon. And it will take a long time for
the standby to become active if there are a great many of requests
from the client. I want to know under what circumstances mds would be
marked as laggy.
Here is my software version and ceph.conf.
Ceph version 0.24.3
Linux kernel 2.6.35.9
Ceph.conf
[global]
pid file = ar/run/ceph/$name.pid
debug ms = 1
[mon]
mon data = /data/mon$id
[mon.0]
host = ceph1
mon addr = 192.168.1.101:6789
[mds]
debug ms = 1
debug mds = 10
debug mds balancer = 10
debug mds log = 10
debug mds_migrator = 10
debug monc = 10
[mds0]
host = ceph1
[mds1]
host = ceph2
[osd]
sudo = true
osd data = /data/osd$id
osd journal = /data/osd$id/journal
[osd0]
host = ceph3
btrfs devs = /dev/sda3
[osd1]
host = ceph4
btrfs devs = /dev/sda3
Thanks
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