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IBM® Domino 10.0.1 Documentation
Welcome to the IBM® Domino 10.0.1 Administrator Help.
Administering
This documentation provides information about the administration tools for managing and monitoring IBM Domino® servers and databases.
Managing databases
Topics in this section describe how to set up and manage Domino® databases.
Attachment consolidation
The Domino® server employs the Domino Attachment and Object Service (DAOS) to save significant space at the file level by sharing data identified as identical between databases (applications) on the same server. Document attachments are the first components to use the DAOS feature in Domino.
How using attachment consolidation affects a user's mail file quota
When calculating the size of a mail file to determine whether it conforms to configured mail quota or warning threshold limits, Domino® treats attachments stored using the Domino Attachment and Object Service as though each user owned the entirety of the attachment file. Thus, the full size of every message delivered to a mail file that uses DAOS counts against the mail file quota.

How using attachment consolidation affects a user's mail file quota

When calculating the size of a mail file to determine whether it conforms to configured mail quota or warning threshold limits, Domino® treats attachments stored using the Domino Attachment and Object Service as though each user owned the entirety of the attachment file. Thus, the full size of every message delivered to a mail file that uses DAOS counts against the mail file quota.

Likewise, when a user deletes a message that is linked to a DAOS-enabled database, the full size of the message is removed from the mail file quota.

The actual file size of the mail database that uses attachment consolidation therefore does not necessarily reflect its logical size. For example, a user's mail file might exceed its quota limit of 60MB even though the physical size of the file is only 35MB.