> The Schedular is CFQ and can be changed on the fly to whatever Block > Device you want it. It does not matter what load the system is under. > Changing to Deadline on his specific block device will improve the I/O > of the system unless it really being hammered. Keep in mind these > changes will be gone on Reboot. You can put these in rc.local to > activate at boot time. Substitute "hda" for your device. This does not > work on iscsi or SAN mounts. > > [root at blah ~]# echo 'deadline' > /sys/block/hda/queue/scheduler > [root at blah ~]# cat /sys/block/hda/queue/scheduler > noop anticipatory [deadline] cfq -- Changed to Deadline. echo 'deadline' > /sys/block/sda/queue/scheduler -bash: /sys/block/sda/queue/scheduler: No such file or directory ls -l /sys/block/sda/queue/ total 0 drwxr-xr-x 2 root root 0 Dec 8 17:45 iosched -r--r--r-- 1 root root 4096 Dec 10 10:10 max_hw_sectors_kb -rw-r--r-- 1 root root 4096 Dec 10 10:10 max_sectors_kb -rw-r--r-- 1 root root 4096 Dec 10 10:10 nr_requests -rw-r--r-- 1 root root 4096 Dec 10 10:10 read_ahead_kb No go. Matt