B.5.4. RAID-4/5
Resizing a RAID-4/5 region follows the same rules and restrictions for
resizing a RAID-0 region. Expand a RAID-4/5 region by adding one new
object to the region. Shrink a RAID-4/5 region by removing up to N-1 of
the current child objects in a region with N objects.
See Section B.5.2, "RAID-0" for information about how to perform this
function.
Like RAID-0, RAID-4/5 regions must be deactivated before they are
resized.
This is from http://evms.sourceforge.net/user_guide/#raid45
I usually just reccomend installing a second raid5 then expanding the
volume to use raid-0 over the two raid-5 sets via LVM2 linear.
It all really depends on your needs. Maybe if you were to give me your
planned usage scenario for the database I could be of more help. :) Feel
free to message me privately if you want to keep the details private.
On Thu, 2005-07-28 at 19:13 -0400, Ming Zhang wrote:
> On Tue, 2005-07-26 at 09:59 -0500, Brian Wolfe wrote:
> > I *think* the latest EVMS supports dymanic raid-5 capacity changing on
> > 2.6.? (dunno which version it started at).
> >
> more detail?
>
> u mean raid5 in MD? can that be resize dynamically? i do not know.
>
>
>
>
> > On Tue, 2005-07-26 at 10:36 -0400, Ming Zhang wrote:
> > > I have a friend asked me for this. I wonder if anybody can give me a
> > > recommendation? Many of you are admin who are much better than me on
> > > this. :)
> > >
> > > Thanks!
> > >
> > >
> > > > I have a question for you. I want to use iscsi array
> > > > to store database data file. I hope I can get some
> > > > kind of redundency (RAID) as well as dynamic increase
> > > > disk space without shuting down the database to
> > > > rebuild the array. The database will have transactions
> > > > all the time and can't be shutdown.
> > >
> > >
> > > Ming
> > >
> > >
> > >
> > >
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>
>
>
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