| 摘要 |
<p>Server computer (54) storing a baseline file (88) having baseline data is coupled (56) to client computer (52) storing a local file (70) having modified data. First tier baseline keys (92) are generated for and associated with first tier subsets of the baseline data. First tier client keys (72) are generated for and associated with first tier subsets of the modified data. When the associated keys match (136), a first tier subset of baseline data is transferred to server (54) destination file (90). When the associated (72, 92) keys do not match, a second tier baseline key (92) is generated for and associated with a second tier baseline subset of first tier baseline data. At least one second tier client key (72) is generated for and associated with a second tier client subset of first tier modified data (138). Either second tier subset is transferred to the destination file (90) based on the associated second tier keys (72, 92).</p> |
