501. Briefly: Adding a new node to SGE

I've done this a couple of times by now, and I always forget one step or another. Most of the information is on http://verahill.blogspot.com.au/2012/06/setting-up-sun-grid-engine-with-three.html but here it is in a briefer form:

In the example I've used krypton as the node name, and 192.168.1.180 as the IP.
My front node is called beryllium and has an IP of 192.168.1.1.

0. On the front node
Add the new node name to the front node/queue master

Add execution host

qconf -ae 

which opens a text file in vim

Edited hostname (krypton) but nothing else. Saving returns

added host krypton to exec host list

Add krypton as a submit host

qconf -as krypton

krypton added to submit host list

Doing this before touching the node makes life a little bit easier.

1. Edit /etc/hosts on the node
Leave

127.0.0.1 localhost

but remove

127.0.1.1 krypton

and make sure that it says

192.168.1.180 krypton

instead.

Throw in

192.168.1.1 beryllium

as well.

2. Install SGE on node

sudo apt-get install gridengine-exec gridengine-client

You'll be asked about

Configure automatically: yes
Cell name: rupert
Master hostname: beryllium

3. Add node to queue and group
I maintain separate queues and groups depending on how many cores each node has. See e.g. http://verahill.blogspot.com.au/2012/06/setting-up-sun-grid-engine-with-three.html for how to create queues and groups.

If they already exits, just do

qconf -aattr hostgroup hostlist krypton @fourcores
qconf -aattr queue slots "[krypton=4]" fourcores.q

to add the new node.

4. Add pe to queue if necessary
Since I have different queues depending on the number of cores of a node, I tend to have to fiddle with this.

See e.g. http://verahill.blogspot.com.au/2012/06/setting-up-sun-grid-engine-with-three.html for how to create pe:s.

If the pe you need is already created, you can do

qconf -mq fourcores.q

and edit pe_list

5. Check
On the front node, do

qhost

HOSTNAME                ARCH         NCPU  LOAD  MEMTOT  MEMUSE  SWAPTO  SWAPUS
-------------------------------------------------------------------------------
global                  -               -     -       -       -       -       -
beryllium               lx26-amd64      3  0.16    7.8G    5.3G   14.9G  398.2M
boron                   lx26-amd64      6  6.02    7.6G    1.6G   14.9G     0.0
helium                  lx26-amd64      2     -    2.0G       -    1.9G       -
lithium                 lx26-amd64      3     -    3.9G       -     0.0       -
neon                    lx26-amd64      8  8.01   31.4G    1.3G   59.6G     0.0
krypton                 lx26-amd64      4  4.01   15.6G    2.8G   14.9G     0.0