.edb file extension

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.edb

1. Extensible Storage Engine database page file. Extensible Storage Engine (ESE) is a multi-user, indexed table manager. It is a database format used by a number of Microsoft Windows applications and components. The typical file extension of the database page file is .edb.

This is the file format used by Microsoft Exchange, Windows Update, Windows search and some other windows components.

Relevant links:

http://technet.microsoft.com/en-us/library/bb310772.aspx - Information on the Extensible Storage Engine Architecture.
http://msdn.microsoft.com/en-us/library/ms683068%28EXCHG.10%29.aspx - Extensible Storage Engine Files; lists other file types associated with the Extensible storage engine.
http://everything.explained.at/Extensible_Storage_Engine - Extensible Storage Engine Explained.

2. Microsoft Exchange Server database file. Used by Microsoft Exchange server to manage emails and other user data associated with Exchange. Exchange uses (separate) .edb files to manage both its public and private stores.

For each .edb file there should be an accompanying .stm file.

3. Windows Update data store file. File used by Microsoft Window "Windows Update".

The file typically used by Windows Update is:

C:\Windows\SoftwareDistribution\DataStore\DataStore.edb

Windows update can generate some temporary files, typically named similar to:

C:\Windows\SoftwareDistribution\DataStore\Logs\tmp.edb

but be aware that there may be other files in that folder which are not temporary files.

4. XEphem database file.

Relevant links:

www.clearskyinstitute.com/xephem - Information on XEphem.
www.mmto.org/obscats/edb.html - .edb file format information (from about a quarter of the way down the page)

5. Windows Search index database file. The Windows search service maintains a database (using ESE), which is called Windows.edb and is located in the folder

C:\Documents 
		and Settings\All Users\Application 
		Data\Microsoft\Search\Data\Applications\Windows

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