Replication with multiple DBs in an environment

Hello

I wanted to confirm that replication is designed to operate in an environment of DB with multiple DBs (I want all DBs to replicate).
I want to use a DB for the storage of data and the other to maintain a State of enforcement. In this regard, I also wondered if it's possible/made sense to have a DB into memory and a DB drive in a replicated environment. I wish to use the DB in memory to store the State of the application and am ready to exchange the disc for a replication network sustainability sustainability if it makes me a performance boost.

Thank you
Sanjit

Hi Eric,.

You can certainly use the replication of multilple databases by
environment.

Have a mixture of databases in memory and on disk makes sense.
However, currently there is a bug that prevents the right
resynchronization of a client with the master in certain circumstances
When the databases in memory and on disk transactions are in use. (I
can describe this in more detail if you are interested) I am currently
working on a fix for this bug, for a future release.

Have you considered the flag of the Middle DB_TXN_NOSYNC? Database
updates are generally not necessarily emptied the disk with each
transaction; rather, only the transaction log is normally empty
each time, so it is normally most of the performance. Using
replication with DB_TXN_NOSYNC allows you to "engage in the network."
and a very popular replication using Berkeley DB.

This is, of course, all the work in the environment; It may not be
confined to the effects on the single database. If this is a problem,
You can of course use separate environments, but then you don't get
the advantage of having committed together as a single transaction updates.

Alan Bram
Oracle

Tags: Database

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