TI Multiple Concurrency Control Policies in an Object-Oriented
Programming System 

LT CUCS-020-90 

OR COLUM 

YR 1990 

AU Gail E. Kaiser 

AU Wenwey Hseush 

AU Steven S. Popovich 

AU Shyhtsun F. Wu 

MN May 

YR 1990 

AV ftp cs.columbia.edu:pubreportsreports-1990cucs-020-90?.ps.Z 

AB Object-oriented systems have been generally recognized as a
good choice for approaching a range of parallel and distributed
programming problems.  But different parallel and distributed
applications have different consistency models, so {\em multiple
concurrency control policies} are needed.  When objects are
shared among applications with different policies, multiple
policies must operate simultaneously and compatibly.  We have
investigated two consistency models, atomic blocks and classical
serializable transactions, and the interactions both between
these models and with ``uncontrolled'' concurrency, in the
context of the Meld distributed object-oriented programming
language. We present the relevant language constructs and discuss
certain programming problems and implementation issues.