Messages in this thread | | | Date | Tue, 01 Jul 2003 16:12:51 +1000 | From | Nick Piggin <> | Subject | Re: Evaluation of three I/O schedulers |
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Peter Wong wrote:
>We used 2.5.72+mm1 to evaluate three I/O schedulers, namely >anticipatory, deadline and complete fair queueing under a very heavy >database workload on an 8-way Pentium 4 machine. The workload is a >decision support system doing mostly sequential I/O and each run takes >about one hour. All three runs finished completely without encountering >functional problems, and achieved similar performance level. > >The 8-way machine has Pentium 4 2.0 GHz processors, 16 GB physical >memory, 2MB L3 cache, 8 FC controllers with 80 disks. Hyperthreading >was turned on for the three runs. The CPU utilization is similar for all >three runs: 65% user, 7% system and 28% idle. >
Hi Peter, How many block devices are being used at once in your tests? I would be interested to see profiles of AS and DL if possible. Thanks.
Nick
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