Patent
1995-06-21
1998-04-28
Black, Thomas G.
395611, G06F 1730
Patent
active
057457492
ABSTRACT:
To improve the efficiency in space of per-file clustering. According to the multiple version clustering of this invention, the difference which occurred from modification to the program information of a single source file is initially added to the same cluster as the one holding, the program information of the original source file. This is similar to per-file clustering. What is different from per-file clustering is that each time a difference is added, the amount of the difference is determined by units of byte, for example. Then, in accordance with the invention, in response to the occurrence of the amount of difference accumulation exceeding a predetermined amount, another cluster is created. At this time, the separate cluster will not accommodate another difference, but the entire program information of the modified source file. Differences brought by further modifications are accumulated not in the old cluster, but in the new cluster.
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Black Thomas G.
Duffield Edward H.
International Business Machines Corp.
Rones Charles L.
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