Re: [PERFORM] linux deadline i/o elevator tuning

2009-04-10 Thread Albe Laurenz *EXTERN*
Grzegorz Jaskiewicz wrote: acording to kernel folks, anticipatory scheduler is even better for dbs. Oh well, it probably means everyone has to test it on their own at the end of day. In my test case, noop and deadline performed well, deadline being a little better than noop. Both anticipatory

Re: [PERFORM] RAID 10 Benchmark with different I/O schedulers

2008-05-07 Thread Albe Laurenz *EXTERN*
Craig James wrote: This data is good enough for what I'm doing. There were reports from non-RAID users that the I/O scheduling could make as much as a 4x difference in performance (which makes sense for non-RAID), but these tests show me that three of the four I/O schedulers are within