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Determining the number of remote sites accessed in distributed transaction processing

机译:确定在分布式事务处理中访问的远程站点的数量

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The number of remote accesses and the number of distinct remote sites accessed by global transactions in a distributed database environment are characterized. Both measures are important in determining the overhead of distributed transaction processing and are affected by the distribution of transaction size (number of distinct objects accessed by a transaction) and the distribution of remote accesses made by a transaction. Keeping the mean transaction size fixed, it is shown that in the case of some commonly used distributions for the number of remote accesses variable size transactions access fewer distinct remote sites on the average than fixed size transactions. Also, for these and some other distributions the mean number of remote accesses is independent of the distribution of transaction size, but this is not generally true.
机译:表征了分布式数据库环境中全局事务访问的远程访问次数和不同的远程站点数。这两种措施对于确定分布式事务处理的开销都很重要,并且受事务大小的分布(事务访问的不同对象的数量)和事务进行的远程访问的分布的影响。保持平均事务大小不变,可以看出,在某些常用的远程访问数量分布的情况下,可变大小事务平均比固定大小事务访问更少的独立远程站点。同样,对于这些和其他一些分布,远程访问的平均数量与事务大小的分布无关,但是通常情况并非如此。

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