Soft x-ray diffraction of striated muscle
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Multiversion two-phase locking (MV2PL) provides on-line serializable queries without introducing the long blocking delays that can occur with conventional two-phase locking (2PL). MV2PL requires indexing structures, however, that are capable of supporting multiple versions of data. In this paper, we present several options for extending single-version indexing schemes for use with MV2PL. These basic approaches are largely orthogonal to the underlying indexing structure (e.g., hashing or B+ trees). The options considered differ in where they place version selection information (i.e., references to individual versions); this information is placed either with the data or with the index entries of one or more of the indices. We also present the results from a performance study that show that placing the version selection information with the data is usually the best option, since it keeps the indices smaller and thus enables a larger fraction of the index pages to remain cached in the buffer pool. © 1997 IEEE.
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Elena Cabrio, Philipp Cimiano, et al.
CLEF 2013
Fan Jing Meng, Ying Huang, et al.
ICEBE 2007