On Mon, Apr 27, 2009 at 02:10:10PM -0500, Eric Sandeen wrote: > Now that we have ext4 as the new default filesystem, it'd be nice if we > can get more applications to take advantage of some of the features. > > One big feature that has already been brought up on the list[1] is file > preallocation, which allows an application to pre-allocate blocks it > knows that it will eventually write into, thereby making sure it won't > run out of space, and also generally getting a more efficient/contiguous > file layout. > > * Come up with a list of apps which could benefit: [snip] > - virt image tools? We're one step ahead of you ! libvirt supports it as of 0.6.3 for its raw file storage management APIs, and this is in Fedora 11 trees http://git.et.redhat.com/?p=libvirt.git;a=commit;h=70e7672184ff639856d5f2f3bf7849464031dff9 Thanks to Amit Shah for doing the patch for us, and providing us some compelling performance figures at the same time: http://www.amitshah.net/2009/03/comparison-of-file-systems-and-speeding.html Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
