Hello guys,
-- My company is about to rebuild its whole infrastructure, so I was called in order to help on the planning. We are essentially an corporate mail provider, so we handle daily lots of clients using dovecot and roundcube and in order to do so we want to design a better plant of our cluster. Today, using Jewel, we have a single cephFS for both index and mail from dovecot, but we want to split it into an index_FS and a mail_FS to handle the workload a little better, is it profitable nowadays? From my research I realized that we will need data and metadata individual pools for each FS such as a group of MDS for each of then, also.
The one thing that really scares me about all of this is: we are planning to have four machines at full disposal to handle our MDS instances. We started to think if an idea like the one below is valid, can anybody give a hint on this? We basically want to handle two MDS instances on each machine (one for each FS) and wonder if we'll be able to have them swapping between active and standby simultaneously without any trouble.
index_FS: (active={machines 1 and 3}, standby={machines 2 and 4})
mail_FS: (active={machines 2 and 4}, standby={machines 1 and 3})
Regards,
João Paulo Sacchetto Ribeiro Bastos
+55 31 99279-7092
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