If I am using a more recent client(kernel OR ceph-fuse), should I still be worried about the MDS's crashing? I have added RAM to my MDS hosts and its my understanding this will also help mitigate any issues, in addition to setting mds_bal_frag = true. Not having used cephfs before, do I always need to worry about my MDS servers crashing all the time, thus the need for setting mds_reconnect_timeout to 0? This is not ideal for us nor is the idea of clients not able to access their mounts after a MDS recovery.
I am actually looking for the most stable way to implement cephfs at this point. My cephfs cluster contains millions of small files, so many inodes if that needs to be taken into account. Perhaps I should only be using one MDS node for stability at this point? Is this the best way forward to get a handle on stability? I'm also curious if I should I set my mds cache size to a number greater than files I have in the cephfs cluster? If you can give some key points to configure cephfs to get the best stability and if possible, availability.....this would be helpful to me. thanks again for the help. thanks, Bob
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