| 摘要 |
To avoid the need for storing a tree quota identifier attribute for every file in a quota tree, a tree quota identifier is included in the file handle returned by the file server to a client in response to a directory lookup request. The file server discovers that the file is in a quota tree when searching along a path specified by the file pathname and finding a directory having a tree quota identifier. The file server responds to a client request for changing the storage resources used by the file by inspecting the file handle and upon finding the tree quota identifier in the file handle, using the tree quota identifier to index a tree quota database to find usage and limits for the tree quota. The file server checks the limits against any increase in the storage resources for the file, and updates the usage.
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