Messages in this thread | | | Date | Tue, 15 Sep 2009 04:02:10 -0700 (PDT) | Subject | Re: unfair io behaviour for high load interactive use still present in 2.6.31 | From | Daniel J Blueman <> |
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On Sep 15, 8:50 am, Tobias Oetiker <t...@oetiker.ch> wrote: > Experts, > > We run several busy NFS file servers with Areca HW Raid + LVM2 + ext3 > > We find that the read bandwidth falls dramatically as well as the > response times going up to several seconds as soon as the system > comes under heavy write strain.
It's worthwhile checking: - that the ext3 filesystem starts at a stripe-aligned offset - that the ext3 filesystem was created with the correct stripe-width and stride (chunk) size - due to the larger amount of memory, ext4 may be a big win (due to delayed allocate), if you'll stay with a newer kernel - if you have battery backup at the right levels: - performance may be better mounting the ext3 filesystem with 'barrier=0' - performance may improve mounting 'data=writeback'
Thanks, Daniel -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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