[LUDOC-109] Missing block scheduler tuning suggestion

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Labels: QContent
• Business Value: 6
• Severity: 3
• Assignee: Cliff White (Inactive)
• Reporter: Christopher Morrone (Inactive)

Description

The Lustre Manual has a section that has suggested tuning for "testing", under "Tuning Linux Storage Devices". All of the settings have suggested values except for /sys/block/sdN/queue/scheduler. It would be nice to have a suggestion there.

I think we are probably still using the Linux default (probably CFQ) everywhere at LLNL, and that may be a problem. I remember a recent discussion at LUG that suggested that was bad. ZFS certainly attempts to change the scheduler off of CFQ to noop (if ZFS believes that it owns the entire disc).

For ldiskfs it might be the deadline scheduler that we should recommend?