On Sat, Nov 15, 2008 at 10:52 AM, Richard Scobie <richard@xxxxxxxxxxx> wrote: > Dan Williams wrote: > >> By default MD tries to be fair and allow partially written stripes the >> same access to the disk as fully written stripes to prevent starvation >> for little writers. However, you can sometimes eek out more streaming >> performance at the cost of fairness by increasing this value (where 0 >> == never let a preread pass a full-stripe-write). > > I believe XFS optimises for full stripe writes, so perhaps this setting is > of more benefit for other file systems? > Not really. XFS was used when benchmarking this change [1] and was able to measure a performance gain. [1] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8b3e6cdc53b7f29f7026955d6cb6902a49322a15 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
