[linux-lvm] LVM2 seems to chop performance by 33%
david at dgreaves.com
Mon Jun 21 09:55:54 UTC 2004
Alasdair G Kergon wrote:
>On Sun, Jun 20, 2004 at 07:17:58PM +0100, David Greaves wrote:
>>No-one ever replied as to why blockdev --setra / --getra is not the same
>>as that displayed in lvdisplay
>>And it's not documented that I can find. There's a comment: "Not used by
>>device-mapper." And that means.....?
>Any LVM read ahead setting is ignored by LVM2 i.e. not passed to the kernel.
>If it's demonstrated to be useful it could still be implemented, but
>the current development priorities are still correctness and new features
>rather than performance.
It would be good to modify the docs to be clearer and maybe say "use
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