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Integrated concurrency-coherency controls for multisystem data sharing

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4 Author(s)
Dias, D.M. ; IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; Iyer, B.R. ; Robinson, J.T. ; Yu, P.S.

The authors propose an integrated control mechanism and analyze the performance gain due to its use. An extension to the data sharing system structure is examined in which a shared intermediate memory is used for buffering and for early commit processing. Read-write-synchronization and write-serialization problems arise. The authors show how the integrated concurrency protocol can be used to overcome both problems. A queueing model is used to quantify the performance improvement. Although using intermediate memory as a buffering device produces a moderate performance benefit, the analysis shows that more substantial gains can be realized when this technique is combined with the use of an integrated concurrency-coherency control protocol.<>

Published in:

Software Engineering, IEEE Transactions on  (Volume:15 ,  Issue: 4 )