We deployed Domino 8.5 on our internal cluster servers. On one server, we activated DAOS for all mail and archive databases and for some applications.

The reduction in the pure NSF database size is pretty impressive: in one application from 7,1GB to 1,9GB:


I measured the overall saving: sum of the logical size of all databases using DAOS against their physical size plus the size of the DAOS directory:

- Logical size: 15,8GB
- Physical size of the NSFs: 5,92GB
- Size of DAOS directory: 6,1GB

That sums up in 15,8GB logical size against 12,1GB really needed physical storage. Or in other words. about 23% space saved.
The savings will be much, much more on bigger organizations with more users and mail databases.

So, our opinion is: just the DAOS alone is reason enough for everyone to upgrade to 8.5! It's a killer feature!