Analysis of X.500 Distributed Directory Refresh Strategies

Distributed database directory refresh strategies, commonly recommended for the X.500 standard, are defined and analytically modeled for variations on push/pull and total/differential under idealistic asynchronous control conditions. The models are implemented in a HyperCard-based tool called DirMod (for "directory model"). Experimental test results show important elapsed time performance tradeoff among the different strategies, and live test data contribute to the verification of the models.http://deepblue.lib.umich.edu/bitstream/2027.42/107872/1/citi-tr-90-6.pd

Analysis of X.500 Distributed Directory Refresh Strategies

Distributed database directory refresh strategies, commonly recommended for the X.500 standard, are defined and analytically modeled for variations on push/pull and total/differential under idealistic asynchronous control conditions. The models are implemented in a HyperCard-based tool called DirMod (for "directory model"). Experimental test results show important elapsed time performance tradeoff among the different strategies, and live test data contribute to the verification of the models. 1. Introduction Overview In distributed systems, one major concern is the mapping of names to services. A directory provides this mechanism. The problem of replicating directory information and maintaining the data (updating...) is still being addressed. We choose to study the emerging X.500 standard for directories since Quipu (an implementation of X.500) is readily available [Kille89, KRRT90], and this would be ideal for experimentation to discover the good, the bad and the ugly about directorie..