Messages in this thread |  | | Date | Mon, 5 Nov 2001 21:48:40 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [Ext2-devel] disk throughput |
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On Mon, 5 Nov 2001, Andrew Morton wrote: > > I didn't understand your objection to the heuristic "was the > parent directory created within the past 30 seconds?". If the > parent and child were created at the same time, chances are that > they'll be accessed at the same time?
the thing I don't like about it is the non-data-dependence, ie the layout of the disk will actually depend on how long it took you to write the tree.
I'm not saying it's a bad heuristic - it's probably a fine (and certainly simple) one. But the thought that when the NFS server has problems, a straight "cp -a" of the same tree results in different layout just because the server was moved over from one network to another makes me go "Ewww.."
Linus
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