Domino On-Disk Structure
In this release, Domino® supports file format, on-disk structure (ODS) 51.

About this task

The current level of ODS provides potential improvement for I/O, folder optimization, compression, and attachment consolidation. When a database with an earlier level of ODS is detected, Domino does not automatically use copy-style compact to convert it to the current level of ODS. But as administrator, in this release of Domino, you can upgrade existing databases to the current ODS level using more than one method.

For most non-essential databases, the ODS upgrade takes place in a background process and while a database is upgraded, the client user is not able to use the database. For essential databases that are in use at the point that an upgrade is attempted, the ODS upgrade will be done at the next time the database is opened – typically at client restart.

For version-specific information, see the related topics for Domino system requirements.

Upgrading existing databases on a Domino server to the current ODS level


1. On the Domino server, edit the NOTES.INI file.

2. Add the following setting: NSF_UpdateODS=1.

Upgrading existing databases on client machines to the current ODS level

About this task

You can specify a desktop policy setting that upgrades all local databases on client machines affected by the policy to the current level.

Note: If you cannot use a policy, you can use the NOTES.INI parameter instead to upgrade local databases on a client machine.


1. Create or edit a desktop policy settings document.

2. On the Mail tab, under Client Settings, specify Enable upgrade of all local NSFs to latest ODS version.

Reverting a single database back one ODS level

About this task

To revert a single database back one ODS level, use the compact -r command as shown here:

compact -r <database name>

Related concepts
Editing the NOTES.INI file

Related tasks
Preparing for installing and setting up Domino servers
Creating a Desktop Settings document

Related information
Domino System Requirements