Re: lvm and segmentation

[Sean Neakums <sneakums@xxxxxxxx>]

commence  monkeyiq quotation:

> I have been reading about lvm of late and was thinking of a possilbe
> drawback to its use.
>
> It strikes me that a filesystem no longer knows about a contiguoius
> disk the lvm and so if I define a preallocated 15Gb file then there
> is no real say, even if xfs_bmap reports a single extent, that I can
> be sure that there is a contiguious 15Gb block ready for my
> data. Just wondering if I am correct in this thought?

Sounds about right to me.  If it *really* matters where your data ends
up on disk (or even which disk it ends up on), you probably shouldn't
be using LVM in the first place.

-- 
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