| 摘要 |
<p>The present invention aims to create, at high speed, a list of added, changed, or deleted file data, while the system does not store a large amount of indexed file lists including hash values of file data. A file list generation device includes: means that acquires the directory URLs of search target files from first storage means, counts the number of directories in each layer through analysis of the directory URLs, and, based on the result of the counting, determines a dividing policy to divide a scan target directory scanning operation to be performed with a distributed server cluster; means that divides directories of the search target files in accordance with the determined dividing policy, acquires a snapshot of a current directory tree, and stores the snapshot into second storage means; means that scans, in a distributed manner, the search target files in the respective directories in the snapshot of the current directory tree and a snapshot of a directory tree of search target files acquired prior to the determination of the dividing policy and stored in third storage means, the scan being performed with the distributed server cluster; and means that compares the results of the distributed scans, and creates and outputs a list of files added, deleted, or changed after the creation of the index information.</p> |
