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lørdag 1. september 2012

Exchange 2010: Speed up large migration

By default Exchange 2010 CAS servers limits active moves like this:
MaxActiveMovesPerSourceMDB = 5
MaxActiveMovesPerTargetMDB = 2
MaxActiveMovesPerSourceServer = 50
MaxActiveMovesPerTargetServer = 5
MaxTotalMovesPerMRS = 100
This will allow 5 concurrent moves from the source database, 2 concurrent moves to the target database, 50 per sources server, 5 per target server and 100 per CAS server. If you use high-end disk with plenty of IOPS, you can change the settings gradually up to something like this (be aware of your hardware limitations):
MaxActiveMovesPerSourceMDB = 15
MaxActiveMovesPerTargetMDB = 15
MaxActiveMovesPerSourceServer = 50
MaxActiveMovesPerTargetServer = 40
MaxTotalMovesPerMRS = 250
This will require a restart of the MRS service on the CAS server(s). You can edit these settings in the file MSExchangeMailboxReplication.exe.config, wich would normally exist on the CAS server in C:\Program Files\Microsoft\Exchange Server\V14\Bin\. For more details read this TechNet article.