Adding/removing cells to a vpar npar

[likid0]

Hy,

I have a Npar with vpars, version A.04.03 with 11.23 IA, The Npar has 2 cells, what I need is to remove one of the cells and add a new one.

let's say I have:

npar1
cell 0/6
cell 0/3

and a new cell 0/5.

I wan't to remove 0/6 and add 0/5.

My question is can I do both operations with only one reboot to npars ?.

Or is it better with 2 reboots, first remove and then add ?

could I do:
in vpars mode:
delete cell0/6
add cell0/5
shutdown -R -H
shutdown all vpars
MON>reboot nPars
boot from vmunix
vparenv vPars
boot from vpmon


Or is it better to do it, firt remove(reboot,etc), then add(reboot,etc) ??

Thnx

[likid0]

I was also thinking another way ..., doing the trick with the use-on-next-boot flag

in vpars mode:
change cell0/6 use-on-next-boot flag to NO
add cell0/5
shutdown -R -H
shutdown all vpars
MON>reboot nPars
boot from vmunix (only with cells 0/5 and 0/3)
vparenv vPars
boot from vpmon

Remove the inactive cell0/6 and add it to another npar.

is this ok with vpars ?

[sujit kumar singh · Accepted solution]

Hi, you can do in the same command of parmodify, that is removal of one and addition of the other, but shall be good ti isolate the problem in case you do this adition first and then removal.


surely one more thing is that you need to tale care of the VPAR IO and CPU assignments that is VPAR configuration as removal of add 0/6 and addition of the 0/5 is going to change the HW paths of the IO devices and that need to be taken care in reconfiguring the VPAR that is deassigning and reassigning of the IO paths from/to the VAPRS associated with the cell 0/5.

Also need to take care as in the NPAR complex how are the cells cabled(connetced) how and to which IO Chassis.


also addition of a new cell as well as removal of a cell from NPAR shall require a R-F-R that is reboot-for-reconfig of the NPAR.

it is better that in your case you refer to both the NPAR as well as VPAR admin Guide.

VPAR admin guide
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02029116/c02029116.pdf (BSC link updated by admin)
NPAR config guide:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01868281/c01868281.pdf (BSC link updated by admin) -- page 179

also make sure that the NEW cell bein added is matching and has proper system formware.

regards
sujit

[likid0]

Thnx for the help,

Yes all the io changing is ok, it's taken into account.

The firmware is checked also.

The thing is to do it all together or 1 at a time, I fancy the last combination of using the use on next boot flag, so I only have to do one reboot for reconfig.

but I don't know how vpars, will take it.

[sujit kumar singh]

Hi


Better that you reboot in NPAR mode and then add/remove cells, better by doing that separately, then configure(reconfigure the VPARS). Better to keep the Ignite backup of the VPARs before the activity. and note the boot paths and IO and CPU assigments currently of the VPARs and plan the new IO assignments in advance.
take /etc/cmcluster backup additionally separately if you are having Service guard and also map files of the VGs with -p -v -s -m , that shall be helpful in reimporting the VGs.

better that you add then remove for diagnostic purposes.

As the VPARS are reconfigured and you reboot in VPARs mode, the VPARs on boot shall be installing the new device files and you need to set the boot paths properly and reimport the VGs.

regards
sujit

[Torsten.]

AFAIR changing configs like you want to do requires booting into nPars mode once with your version of vPars.

Why not placing the "new" cell into the the same slot 6? What is changing within the cells?

[likid0]

Torsten.

for the example:

cell 0/6 only has mem and cpu no io
cell 0/5 is a one cell npar, configured with vpars

So i wan't to join cell 0/5 and cell 0/3 to have a 2 cell npar with all the vpars together.

And use cell 0/6 in another npar that needs mem.

I don't want to switch cells, because of the IO paths changing, and having to reconfig cell 0/5 vpars

[sujit kumar singh]

Hi,



as i understand that you are trying to merge two NPARs together to get all the VPARS on one NPAR.
say npar1 has vpars vpar1, vpar2 and vpar3 and has cells 0/3 and 0/5.

npar2 -- single celled NPAR has vpar4 and vpar5.


adding these together say you get npar1 with vpar1,...,vpar5.

that reduces the electrical isolation hence availability of the VPARs when you bring them in the same VPAR.That also you need to consider.
that is earlier for maintanance on the vapr4 and vapr5 you needed npar2 to be down where you could have the npar1 up with vpar1,vpar2 and vpar3.

failure of resources in the combined NPAR hampers the availabilty of all 5 VPARs together also you shall need to manage a bigger VPAR database.

JUST A THOUGHT!
regards
sujit

[likid0]

Yep sujit kumar, good points, but what we are looking for is a big pool of resources so gwlm can have big cpu pool to move around vpars