[linux-lvm] lvcreate distributed extent option

[James Hawtin]

On Sat, 30 Nov 2002, ZECHA,HOLGER (HP-Germany,ex1) wrote:

>
> Hello,
>
> I want to create a logical volume of 40GB Size using a physical 9GB disks,is
> there a way to create a logical volume in the way, that the first logical
> extend is on disk one, the second on disk two, ... the 7th on disk one and
> so on ?
>
> Meaning all logical extends are distributed accross all disks.
>
> In HP-UX lvdisplay wwill look like this:
>    --- Logical extents ---
>    LE    PV1                PE1   Status 1
>    00000 /dev/dsk/c16t0d0   00012 current
>    00001 /dev/dsk/c16t0d1   00012 current
>    00002 /dev/dsk/c17t0d2   00000 current
>    00003 /dev/dsk/c17t0d3   00000 current
>    00004 /dev/dsk/c16t0d4   00000 current
>    00005 /dev/dsk/c16t0d5   00000 current
>    00006 /dev/dsk/c17t0d6   00000 current
>    00007 /dev/dsk/c17t0d7   00000 current
>    00008 /dev/dsk/c16t1d0   00000 current
>    00009 /dev/dsk/c16t1d1   00000 current
>    00010 /dev/dsk/c17t1d2   00000 current
>    00011 /dev/dsk/c17t1d3   00000 current
>    00012 /dev/dsk/c16t1d4   00000 current
>
> Holger
>

How about striping with the strip size equal to that of a logical extent?

otherwise if you have quite alot of disk space on another drive you could
create your lv on that one then move the extents one at a time to the
destinations drives using pvmove.....

One does wonder why you want to do this!

James