On Wed, 2007-03-07 at 17:38 -0600, Callum Lerwick wrote: > Lets not get crazy > here. ext3 does a decent job of not fragmenting files unnecessarily, can > we really gain much more than the current readahead solution? Yes we can. See point 8. of http://www.redhat.com/archives/fedora-devel-list/2004-November/msg01374.html > We could designate the first ext3 block group (actually should make the > number configurable) as the "hot" area. Patch the kernel so it avoids > doing any allocations in the "hot" group(s) except as a last resort. > Then write a tool to move files into the "hot" area somehow, possibly > with help from the kernel. It's been two and half years ago since I showed that even a poor hack of "defragging" the file system makes booting around 15-20 seconds faster and I'd be surprised if the same isn't true today. It would be useful if some of the ext3 developers actually read fedora-devel-list and commented on this. David -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
