Hi all.

If cephfs client is in a slow or unreliable network environment, the client 
will be added to OSD blacklist and OSD map, and the default duration is 1 hour.
During this time, the client will be forbidden to access CEPH. If I want to 
solve this problem and ensure client's normal I/O operation is not interrupted,
are the following two options feasible? which one is better?

1. Set "mds_session_blacklist_on_timeout" to false, and forbid to add slow 
clients to blacklist;

2.Just reduce the duration of slow clients joining the blacklist, and change 
the default 1 hour to 5 minutes. 
(set the value of "mon_osd_blacklist_default_expire" to 5 minutes)


Are the two schemes feasible? Will it have a great impact on the data security 
and integrity of CEPH?
Can you give me some suggestions?

Thanks.
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