http://packages.debian.org/sid/eatmydataEn gros, ça économise certaines écritures qui font patiner le disque, et ça peut être utile pour certaines tâches cron où ce ne serait pas grave de perdre les données produites.
http://feeding.cloud.geek.nz/posts/three-wrappers-to-run-commands-without-impacting-the-rest-of-the-system a écrit:
Turning off disk syncs
Another relatively unknown tool, which I would certainly not recommend for all cron jobs but is nevertheless related to I/O, is eatmydata.
If you wrap it around a command, it will run without bothering to periodically make sure that it flushes any changes to disk. This can speed things up significantly but it should obviously not be used for anything that has important side effects or that cannot be re-run in case of failure.
After all, its name is very appropriate. It will eat your data!
Sur un serveur mutualisé avec de longues opérations d'écriture disque ça doit valoir le coup