Pádraig Brady wrote: > Mildred wrote: >> Hi, >> >> I noticed that du takes a long time to scan directories and measure >> disk usage. >> >> I was thinking that perhaps caching the size of directories could bu >> useful. Perhaps, after du computes the size of a directory, it could >> write its size in its extended attributes (if the filesystem support >> it). Next time, du would only compare the directory atime (or mtime >> perhaps) with the time of the scan. That could possibly save some time >> during the scan. > > Those values would be invalidated though once a change > has been written anywhere in the tree under a directory.
I just noticed the announcement of the Ceph distributed file system which does maintain tree sizes for each node: http://lkml.org/lkml/2008/7/15/385 _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
