OSCAR is still set up to some degree with the old assumption that all your
nodes are identical. The way it does images is an artifact of this.
The "overrides" directory structure already has some of this logic (ie
dealing only with the parts of the image you want to be different), but it
is currently used only per image. I would think it wouldn't be insanely
hard to have it check these files per node.
You could just change how the master script works by node too... Depends on
how static (or significant) the differences between the nodes are I guess.
The ability of OSCAR to handle node-level differences certainly needs a lot
of work, but this isn't a quick-fixable thing I don't think.
The images aren't crazy big though, so unless you have more than 5 or so
types of nodes I would say the current method is certainly not optimal, but
isn't insane...
Things like this are on the cosmic to do list, but I don't think it is on
anyones plate yet. It would certainly be a useful change if you wanted to
work on it :)
On 4/20/07, Ivan Adzhubey <[EMAIL PROTECTED]> wrote:
On Thursday 19 April 2007 08:12:50 pm Michael Edwards wrote:
> If you make a new image ( by reruning the wizard and starting with step
4
> and going on from there like you did the first time) only with a new
disk
> layout, you should be able to make some nodes with one image and some
nodes
> with the other, I think.
Sure, but that's exactly what I was trying to avoid. Making a new image
every
time you just need a few slave configuration bits changed is a rather huge
waste of resources...
BTW, my home-brewed cluster management system can do this. It stores
nodes'
image(s) and settings separately so you can easily set up single OS image
with as many different settings as you like. In fact, I suspect this can
be
done with OSCAR also, I just can't figure out how yet...
--Ivan
> On 4/19/07, Ivan Adzhubey <[EMAIL PROTECTED]> wrote:
> > On Thursday 19 April 2007 06:58:35 pm Michael Edwards wrote:
> > > See if this document is helpful, she installed oscar on top of an
> >
> > existing
> >
> > > windows cluster, preserving the windows cluster partitions.
> >
> >
http://svn.oscar.openclustergroup.org/wiki/oscar:5.0:user_submissions:win
> >do
> >
> > >ws_linux
> >
> > Thanks, Michael, this is a very useful document. Still, it seems this
> > installation is not possible since I have one (possibly, two)
computer(s)
> > with disk specifications different form all others. As far as my
> > understanding of the instructions, there is no way to have computers
with
> > several different disk layouts within the same OSCAR cluster.
> >
> > > On 4/19/07, Ivan Adzhubey <[EMAIL PROTECTED]> wrote:
> > > > Hi,
> > > >
> > > > Is there any way to tell OSCAR to install node image on the second
> >
> > drive
> >
> > > > instead of the first one (and do not touch the first one at all)?
I
> >
> > have
> >
> > > > a computer with 3Ware RAID controller and a 4-disk array attached,
> > > > for some reason Fedora Core 5 kernel recognizes it as /dev/sda,
while
> > > > the built-in SATA controller attached disk is set as /dev/sdb. To
> >
> > complicate
> >
> > > > things, GRUB
> > > > seems to (correctly) enumerate SATA disk as (hd0).
> >
> > --Ivan
> >
> >
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