I am trying to setup 3 MDS servers (one on each MON) but after I am done 
setting up the first one, it give me below error when I try to start it on the 
other ones. I understand that only 1 MDS is functional at a time, but I thought 
you can have multiple of them up, incase the first one dies? Or is that not 
true?

[jshah@Lab-cephmon002 mds.Lab-cephmon002]$ sudo service ceph start 
mds.Lab-cephmon002
/etc/init.d/ceph: mds.Lab-cephmon002 not found (/etc/ceph/ceph.conf defines 
mon.Lab-cephmon002 mds.cephmon002 , /var/lib/ceph defines mon.Lab-cephmon002 
mds.cephmon002)

[jshah@Lab-cephmon002 mds.Lab-cephmon002]$ ls -l 
/var/lib/ceph/mds/mds.Lab-cephmon002/
total 0
-rwxr-xr-x 1 root root 0 Nov 14 18:42 done
-rwxr-xr-x 1 root root 0 Nov 14 18:42 sysvinit

[jshah@Lab-cephmon002 mds.Lab-cephmon002]$ grep cephmon002 /etc/ceph/ceph.conf 
mon_initial_members = Lab-cephmon001, Lab-cephmon002, Lab-cephmon003
mds_data = /var/lib/ceph/mds/mds.Lab-cephmon002
keyring = /var/lib/ceph/mds/mds.Lab-cephmon002/keyring

—Jiten
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