What is Public Information Store?
One of the two databases within the information store on a Microsoft Exchange Server computer. The public information store stores content for public folder replicas on the server. The public information store consists of a number of files in the \mdbdata directory on the Exchange server.
These files include the following:
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Pub.edb:
Actual database file
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Edbxxxxx.log:
Contains transaction files for tracking changes to the database
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Edb.chk:
A checkpoint file to keep track of transactions in edbxxxxx.log that are uncommitted
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Res1.log and Res2.log:
Reserved log files used in low disk space conditions
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Temp.edb:
A temporary file used for storing transactions that are in progress