Quoting Yong Huang <yong321@xxxxxxxxx>: > On RH5, I can tell what I/O scheduler I'm using: > > $ uname -a > Linux thehostname 2.6.18-92.1.13.el5 #1 SMP Thu Sep 4 03:51:21 EDT 2008 > x86_64 x86_64 x86_64 GNU/Linux > $ cat /etc/redhat-release > Red Hat Enterprise Linux Server release 5.2 (Tikanga) > $ cd /sys/block/sda/queue > $ ls -l > total 0 > drwxr-xr-x 2 root root 0 Nov 26 13:43 iosched > -r--r--r-- 1 root root 4096 Jan 12 23:12 max_hw_sectors_kb > -rw-r--r-- 1 root root 4096 Jan 12 23:12 max_sectors_kb > -rw-r--r-- 1 root root 4096 Jan 12 23:12 nr_requests > -rw-r--r-- 1 root root 4096 Jan 12 23:12 read_ahead_kb > -rw-r--r-- 1 root root 4096 Jan 12 23:12 scheduler > $ cat scheduler > noop anticipatory deadline [cfq] > > So I'm using CFQ. But on RH4, there's no /sys/block/sda/queue/scheduler: > > $ uname -a > Linux hostname 2.6.9-55.ELsmp #1 SMP Fri Apr 20 16:36:54 EDT 2007 x86_64 > x86_64 x86_64 GNU/Linux > $ cat /etc/redhat-release > Red Hat Enterprise Linux AS release 4 (Nahant Update 7) > $ ls -l /sys/block/sda/queue > total 0 > drwxr-xr-x 2 root root 0 Jan 13 11:03 iosched > -r--r--r-- 1 root root 4096 Jan 13 11:02 max_hw_sectors_kb > -rw-r--r-- 1 root root 4096 Jan 13 11:02 max_sectors_kb > -rw-r--r-- 1 root root 4096 Jan 13 11:02 nr_requests > -rw-r--r-- 1 root root 4096 Jan 13 11:02 read_ahead_kb > > I checked grub.conf. Neither box has an entry for I/O scheduler. cfq is the default scheduler on RHEL 4. grep scheduler /var/log/messages* (provided that there are still logs from when the system booted) -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
