PROTOKOL CONCURRENCY CONTROL PADA REAL-TIME DATABASE SYSTEM
Abstract: Control Concurrency
on RTDBS more complex than in conventional database system. Besides guarantee
database consistency, on RTDBS control concurrency can support transaction
deadlines. Mean while validities and value of data item change depend on time.
Conventional control concurrency algorithm can be divided to two groups:
Pessimistic Concurrency Control (PCC) and Optimistic Concurrency Control (OCC).
PCC prevent conflict between transactions executed while OCC overcome between
transactions after that transaction executed that restarted in conflict
happened. These algorithms have weakness if applied in RTDBS that gives tight
time on transaction execution because as a parameter is number of transactions
done before deadlines, not only number of concurrency maximum and throughput. To
overcome those two algorithms weakness some researches done. Between results modifications is speculative
concurrency control and Hybrid concurrency control for the Nested model. But
between alternatives there are some weaknesses, so it needs development for
better control concurrency for RTDBS.
Penulis: Kuspriyanto, Rusdi HS
Rusdi HS, Hartanto
Kode Jurnal: jptinformatikadd070026
