DAOS, Domino 8.5.1 and Replication

Darren Duke recently wrote an article about DAOS optimization in Domino 8.5.1 and replication. In his article he says that there is no advantage when creating a new replica.

I tested today and here are my findings. I use a Domino cluster with 2 servers running Domino 8.5.1.

When you create a new copy using the admin client then an “accelerated create replica” request  is created in admin4.nsf.  In this case that won’t take advantage of DAOS exploitation as that is basically just an OS copy of the file.

But the DAOS team did a great job. When the source server determines that the target server is DAOS enabled, then adminp creates a normal replica creation request. Now only those attachments that do not already exist as .NLO files on the target server are transfered to the target. If an attachment already exists on the target server, only the ticket is replicated.

I did some more research and found a technote about “When is the AdminP “Accelerated Create Replica” feature used?”

And here I found a possible cause for the behaviour Darren mentioned in his article.

You can force to always use “accelerated create replica” by setting the following parameter in the notes.ini of the source server.

ADMINP_ACCELERATED_REPLICA_OVERRIDE=4

Pls. review your notes.ini settings to take the full advantage of DAOS optimization features in the upcoming 8.5.1 release of Lozus Notes / Domino. I will also send this as a new rule proposal to the DCT team.