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- W2160460372 abstract "This paper presents a portable, efficient method for accessing memory resident persistent objects in virtual memory in the context of the E programming language. Under the approach, objects are copied from the buffer pool of the underlying object manager into virtual memory on demand, as they are accessed by an E program. The cumulative effects of updates to a persistent object are then propagated back to the object manager via a single write operation at the end of each transaction. The method incorporates a comprehensive pointer swizzling mechanism to enhance performance. Swizzling is done a pointer-at-a-time and software checks are used to detect the use of swizzled pointers. The paper also presents the results of a performance study comparing the method presented here with several alternative software architectures including ObjectStore V1.2, a commercially available OODBMS. The results highlight the tradeoffs between providing software vs. memory-mapped support for pointer swizzling and quantify the effects of pointer swizzling on overall performance. In addition, the significant performance impact of pointer swizzling on the generation of recovery information is examined. The experimental results show that in many situations a software approach can outperform the memory-mapped approach." @default.
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- W2160460372 date "1992-08-23" @default.
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- W2160460372 title "A Performance Study of Alternative Object Faulting and Pointer Swizzling Strategies" @default.
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