[SOLVED] ceph mds question

so we have 7 nodes set up to use ceph.

I am starting to test ceph-fs

does it make sense to have all nodes be a mds?

or like mons limit it to 3 ?

for 'hotstandby parameter option' - I assume all mds systems should use that option - if not please advise.

thanks

 

OK and
Is it a good practice in a 5 or 7 node cluster to have all nodes be a MDS backup?

 

OK then I'll just use 3.