Exchange DAG and circular logging

[Max Coder]

Hi,


We have Exchange server 2019 DAG environment. Also there are 8 DBs.

Circular logging for DB02 remains enabled. circular logging for other DBs is disabled. Can I disable circular logging for this DB for the day? Will there be a negative effect?
Veeam agent based database backup is being taken. log truncate is enabled. I will do it when backup job is not running?

A non-replicated mailbox databases will use JET circular logging. If the database is part of a DAG, the database will use continuous replication circular logging (CRCL). A benefit of CRCL is, that it can be enabled and disabled without the need of dismounting and re-mounting the mailbox database. Right ?

[Michael B. Smith]

It’s more complicated than that:

 

https://learn.microsoft.com/en-us/exchange/high-availability/disaster-recovery/disaster-recovery?view=exchserver-2019#exchange-native-data-protection

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[maxcoder1]

In summary, I will disable circular logging for DB02. In DAG structure, do I need to remount DB02?

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