Forum Discussion

Bronze Contributor

Oct 26, 2017

Solved

DAG log file truncation behaviour

Is anyone able to point to anything from Microsoft that describes the log file truncation process? I'm looking to confirm that if we configure an Exchange node that contains only passive DB's and per...

Exchange Server

Brian Reid
Nov 01, 2017
Yes it will. If you have an Exchange aware backup then backing up only a passive database is supported and works. Once the backup is complete and the current logs saved to backup the logs are truncated and this information is replicated across the DAG over RPC.

I had a client many years ago that blocked RPC across the inter-DAG network and truncation did not happen. Within seconds of fixing the network firewall TB of logs files got cleaned up on numerous servers across the world.

Brian Reid

MVP

Nov 01, 2017

Yes it will. If you have an Exchange aware backup then backing up only a passive database is supported and works. Once the backup is complete and the current logs saved to backup the logs are truncated and this information is replicated across the DAG over RPC.

I had a client many years ago that blocked RPC across the inter-DAG network and truncation did not happen. Within seconds of fixing the network firewall TB of logs files got cleaned up on numerous servers across the world.