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Hadoop, mail # general - hadoop disk selection
hadoop disk selection
Xiang Hua 2012-09-29, 06:16
i want to select 4(600G) local disks combined with 3*800G disks form
diskarray in one datanode.
is there any problem? performance ?
Re: hadoop disk selection
Ted Dunning 2012-09-29, 09:37
If you use any sort of RAID-0, you may effectively either lose 200GB from
the larger disks or lose significant performance from the disk array.
Make sure that the striping is significantly long. The default for most
RAID setups is too short.
On Sat, Sep 29, 2012 at 2:16 AM, Xiang Hua <[EMAIL PROTECTED]> wrote:
> i want to select 4(600G) local disks combined with 3*800G disks form
> diskarray in one datanode.
> is there any problem? performance ?
> Best R.
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