I am trying to get an understanding of an exchange infrastructure built with fault tolerance/HA. essentially there are 2 mailbox database
servers, each with 2 databases on both servers. I have yet to check, but is it common to have 2 copies of the same MBXdatabase, on the same server. Looking at the file sizes of the 2 mbxDB they are very similar , but not identical (2gb difference). I wasnt
sure as yet before speaking to the admin, if they are clones of the same mailboxDB. But is this kind of setup common, i..e 2 copies of the same mailboxDB on the same server, and then 2 copies of the same MBXdatabases on another server? I would have thought
if they were exact replicas then surely the file size would be the same.
perhaps the 2 mailbox db's on the same server are completely unrelated, and the only spare copy is on the other server, i.e. 1 copy of the same DB on both servers. Just wondered if its common to have essentially 4 copies of the same mbxDB, 2 copies of the same on 2 servers? I am just trying to get my head around why they seem to of backed up fully one of the DB's 2 weeks ago, and the other mbxDB on the same server 1 week ago. same backup pattern on both servers. not sure whether you should backup both copies of the 2 mailboxDB's on the same server at the same time, or why you would rotate, why not just backup the primary copy of the mbxDB every time..
so essentially it seems to be
mbxserver1 DB1 - backup 1/1/2014
mbxserver1 DB2 - backup 8/1/2014
mbxserver2 DB1 - backup 1/1/2014
mbxserver2 DB2 - backup 8/1/2014
perhaps the 2 mailbox db's on the same server are completely unrelated, and the only spare copy is on the other server, i.e. 1 copy of the same DB on both servers. Just wondered if its common to have essentially 4 copies of the same mbxDB, 2 copies of the same on 2 servers? I am just trying to get my head around why they seem to of backed up fully one of the DB's 2 weeks ago, and the other mbxDB on the same server 1 week ago. same backup pattern on both servers. not sure whether you should backup both copies of the 2 mailboxDB's on the same server at the same time, or why you would rotate, why not just backup the primary copy of the mbxDB every time..
so essentially it seems to be
mbxserver1 DB1 - backup 1/1/2014
mbxserver1 DB2 - backup 8/1/2014
mbxserver2 DB1 - backup 1/1/2014
mbxserver2 DB2 - backup 8/1/2014