Buffering Long Externally-Defined Objects

Title Buffering Long Externally-Defined Objects
Author(s) B. Blott, H. Kaufmann, L. Relly, H.-J. Schek
Type inproceedings
Booktitle Proc. of the 6th Int. Workshop on Persistent Object Systems (POS6)
Tarascon, France
Organization Institute for Information Systems, ETH Zurich
Month September
Year 1994


This paper describes a database buffer-management scheme which is adapted to the management of long, externally-defined objects. Multi-page objects are fragmented by traditional buffer managers, and such fragmentation must be accommodated by higher-level software. However, externally-defined operations, which may be used to embed application-area specific object semantics within database systems, cannot accommodate such fragmentation. This paper describes a buffer manager combining traditional database techniques with a memory-mapping scheme which reconstructs uniform addressability within client address spaces.

This work is being pursued within our Concert prototype development effort. We describe our implementation considerations and report on our initial evaluation.

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