|From:||Brent A Nelson|
|Subject:||[Gluster-devel] Feature suggestion|
|Date:||Fri, 20 Mar 2009 10:31:29 -0400 (EDT)|
|User-agent:||Alpine 1.00 (DEB 882 2007-12-20)|
Basically, the idea is to just keep a running tally of how much data is stored in each directory. I believe he did this originally for quota support, but the neat part is that he decided to make the collected statistics available simply through ls. If you do an ls -l, the size associated with any directory listed is the current estimated amount of data contained in that directory (and any subdirectories within), rather than the size of the directory inode itself (and who really cares about the size of the directory inode?). Neat!
In filesystems where du can take a very long time to run, this would be rather convenient. It's possible that it might break some applications, so it certainly should be optional, but such applications are likely quite rare.
Perhaps this would fit in nicely with a per-directory quota translator, as such a translator might store usage data by directory in an extended attribute, anyway?
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