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Defragmentace disků v Linuxu

"One of the coolest things about CFQ is that it features I/O priorities (since 2.6.13). That means you can set the I/O priority of a process so you can avoid that a process that does too much I/O (daily updatedb) starves the rest of the system, or give extra priority to a process that shouldn't be starved by other processes, by using the ionice tool included in schedutils (since version 1.5.0)."