Les systèmes de fichiers ext3 / ext4 etc. fragmentent. Peu, pas vite, mais au bout de 6 ans ça ralentit l’ordinateur. Il existe la commande shake pour défragmenter.
Ext file systems are fragmenting. A little bit, slowly, but after a quite some years it slows down a computer. That’s why it exists the shake command, to defrag old systems. shake is a defragmenter that runs in userspace, without the need of patching the kernel and while the system is used (for now, on GNU/Linux only).
Using Arch Linux the shake command is available as a PKGBBUILD. Using Debian there is a third-party repository (vleu.net/apt) or it’s easy to compile.
First, check that your partition is mounted with the user_xattr option, else edit your /etc/fstab to add this option then call mount -o remount MY_PARTITION. Shake can works without them, but will be less efficient (it use xattr to store information helping incremental use).
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Then, you can check the fragmentation of a directory or a whole unmounted partition with :
# shake --pretend --verbose --verbose $my_dir (1) (2)| 1 | launched as root |
| 2 | $my_dir should be replace with an existing directory |
And reduce it via :
# shake $my_dir (1)
# find -iname '*.mp3' | sort | shake (2)| 1 | to defrag the $my_dir directory |
| 2 | to defrag all MP3 in a directory, puting together on the disk those close in lexical order |
Better avoid shaking : /proc /sys /dev /tmp or /run ; it’s useless
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SSD storages are less affected (nearly not at all) by fragmentation, it’s their normal way of operation. But rescue utilities (such as : fsck or photorec) are way faster on defragmented filesystems, so better keep it defragmented and let the storage microcontroller manage hardware fragmentation / wear balance.
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| More information of the official website of the project : http://vleu.net/shake/ |
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