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Summary: Grouping Techniques for Update Propagation in Intermittently
Connected Databases \Lambda
Sameer Mahajan +y Michael Donahoo + Shamkant Navathe + Mostafa Ammar +
Sanjoy Malik z
+ College of Computing z Advanced Technology Development Center
Georgia Institute of Technology Georgia Institute of Technology
Atlanta, GA 30332, USA Atlanta, GA 30332, USA
Abstract
We consider an environment where one or more
servers carry databases that are of interest to a com
munity of clients. The clients are only intermit
tently connected to the server for brief periods of time.
Clients carry a part of the database for their own
processing and accumulate local updates while discon
nected. We call this the Intermittently Connected
Database (ICDB) environment. ICDBs have a wide
variety of applications including sales force automa
tion, insurance claim processing, and mobile work
forces. Our focus in the paper is on the problem of
update propagation at the server in ICDBs and the
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