How to shrink exchange database size without downtime?
This is using MS Exchange 2010 with SP3. There are 3 Exchange servers holding mailbox and hub transport roles. These 3 exchange servers are in DAG. A mailbox database was found growing with size of nearly 600 GB. 200+ mailboxes were housed in it. However, we removed 40+ mailboxes, and we going to remove up to 60 mailboxes in 3 months' time. However, as expected, the db size not reduced.
I know that in order to reduce the size, we have to dismount the db, and then use microsoft tool - eseutil to "purge away"the white spaces. This method is called offline defrag and it may takes days to complete the operations.
Is there any alternative way to defrag (online or so) and reduce the db size without or with minimal downtime?
I would suggest you to follow the below sequences,
1. Get Databases wise mailbox size report and sort it (bigone first), you can use the below cmdlet to get the reports.
Open in new window2. Identify top mailboxes (active and growing) in the growing database, move some top mailboxes to other DB's(balanced) using below cmdlet
Open in new windowNow you have enough time so create new database. Then move mailboxes batch wise to newly created mailbox database using below cmdlet,
Open in new window