Williams225
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IBM TSM : my exchange database backups are twice the total size of my databases
Hello experts,
I am having an issue with my exchange backup.
I use tdp for exchange . My exchange DAG is a cluster of 2 mbx servers. The total of the databases are supposed to be less than 5 terrabytes.
When Watching my tsm reports, I have noticed that the size of my DAG backups is around 9 terrabytes wile I do daily incremental backups and I only keep one version of each backups!
I also noticed that the preferDAGpassive option is set to false? Do I backup twice the dabases?? Whats the best practice, please I am lost. whats the real meaning of preferdagpassive?
I am having an issue with my exchange backup.
I use tdp for exchange . My exchange DAG is a cluster of 2 mbx servers. The total of the databases are supposed to be less than 5 terrabytes.
When Watching my tsm reports, I have noticed that the size of my DAG backups is around 9 terrabytes wile I do daily incremental backups and I only keep one version of each backups!
I also noticed that the preferDAGpassive option is set to false? Do I backup twice the dabases?? Whats the best practice, please I am lost. whats the real meaning of preferdagpassive?
ASKER
Ok you are right, I have just noticed the preferdag passive is set to true in my backup script.
But What I don't understand is the fact that the size of my exchange backup is twice the size of the exchange databases size while i only keep one active version of all exchange backups.
But What I don't understand is the fact that the size of my exchange backup is twice the size of the exchange databases size while i only keep one active version of all exchange backups.
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However i am not familiar with your backup software but rule of thumb is backup the passive node. See the below link for additional detail.
https://technet.microsoft.com/en-us/library/dd876874.aspx
Will.