ICS '90 Proceedings of the 4th international conference on Supercomputing
Transaction Processing: Concepts and Techniques
Transaction Processing: Concepts and Techniques
Efficient Locking for Shared Memory Database Systems
Efficient Locking for Shared Memory Database Systems
The NYU Ultracomputer Designing an MIMD Shared Memory Parallel Computer
IEEE Transactions on Computers
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In parallel database systems, conflicts for accesses to objects are solved through object locking. In order to acquire and release locks, in the standard implementation of a lock manager small sections of the code may be executed only by a single thread. On massively parallel shared memory machines (SMM) the serialization of these critical sections leads to serious performance degradation. We eleminate the serialization by decomposing the complex database lock needed for granular locking into basic lock primitives. By doing so, we measured a speedup of a factor 200 on the SB-PRAM. Our method can be ported to any architecture supporting the used lock primitives, as most SMMs do.