-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 It's back! Back in the days when dinosaurs walked the earth ( the '90s ), there was a defragger for ext2 written by Stephen Tweedie with contributions from others including Ted Ts'o. After many years of abandonment and bit rot, I have decided to take over maintainership of the package. I now feel that it is in good enough of a state for a wider audience ( including working with extents and other ext4 features ), so I am announcing it here and asking for testing. The project page is http://launchpad.net/e2defrag. The program opens an unmounted block device and parses the filesystem itself, assigns new locations for all blocks, packing them to the left within their native block group if possible, then moves all the blocks around quickly and efficiently. The process it fast, but unsafe: should anything go wrong or the process be interrupted, your fs will be toast. Therefore: DO NOT USE ON A FS YOU CARE ABOUT AND/OR HAVE NOT BACKED UP FIRST Should a bug cause it to trash your fs, a raw e2image ( e2image -r /dev/sda1 - | bzip2 -c > sda1.e2i.bz2 ) made before the defrag, and obviously saved on another fs, would be most helpful in debugging. One of the more interesting features is the ability to pass a list of inodes to be given priority over others. This can be used to pack a set of files together at the start of the disk to allow for faster booting. I cobbled together a simple python script, dump2inodes, that can obtain the list of files that ureadahead ( Ubuntu ) loads during boot and generates the inode priority listing you can pass to e2defrag, and this gives some nice boot time improvements. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJP9243AAoJEJrBOlT6nu75GPAIAJuZ7IiBH1YinJXFTil+R6z9 EtLI4lZkHeWUGbVr/CnhV9l1iYIVo/aqPCBo4yH0efFGPSxF9z/KN8zIEvqs3Q30 nDe1dNACyvkeIfzyP7wkFxuqK7hX7wkF+cIYT24MftTGTfaXssnoJ5bGd9TyJ0+s 8fNM/Erq4saRBnq4aty/Q3FsAF9sc4ke5042FHNSM+xCFfHjZcsciTdPZP5svAcH 8crQFmR9ieDIbn1M54mWWp3hYTd368ScJSoiM+K+d8ofbrXRSapJ9bSvuhLjvoxE Tx7QXFdHoJb+Id4yf6xI/OZjg9egPW6otkPWwUJfAIE2Wh2AAfnAsGNg4QA86Ws= =PK87 -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
