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PrasantChettri's avatar
PrasantChettri
Copper Contributor
Jun 24, 2020

Exchange 2013 DAG

I have exchange cu15 with DAG on a hybrid environment where most of the mailboxes has already been migrated. One of the mail server database drive is almost running out of space.

How to I clean it up DB and log  files in a DAG environment considering I am only using one mailbox for hybrid?

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  • manuphilip's avatar
    manuphilip
    MCT
    Jun 24, 2020

    Hi PrasantChettri ,

    The immediate solution is to remove transition logs, which will free up plenty of space in the disk. To clear up transaction logs (If you don't need the logs further), enable circular logging for the database. Mount and un-mount the databases is needed to take effect the changes. Once the logs are clear up, you can disable circular logging again to keep the original settings

     

    https://docs.microsoft.com/en-us/exchange/configure-circular-logging-for-a-mailbox-database-exchange-2013-help?redirectedfrom=MSDN

     

    Thanks,

    Manu

    • Prasant Chettri's avatar
      Prasant Chettri
      Copper Contributor
      Jun 24, 2020
      Is it safe to clean up transaction log from one server in a dag enabled environment? Or it needs to be removed from both server?
      • manuphilip's avatar
        manuphilip
        MCT
        Jun 24, 2020

        Hi Prasant Chettri 

         

        When you enable circular logging in database, It re synchronizes the logs and it will be purged in all database copies. It may few hours depends on the database size. A 200 GB of database with 300 GB logs takes 3 to 4 hours in Blade servers

        To Enable circular logging, you may use the following cmdlet :

        Set-MailboxDatabase “DatabaseName” -CircularLoggingEnabled:$True

        To Disable:

        Set-MailboxDatabase “DatabaseName” -CircularLoggingEnabled:$False

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