SGE

[upgrade]

The following is a basic outline of how you would upgrade SGE from the minor release updates.

• Download the all platform package from Sun Oracle
• Unpack into a new directory along side the existing (I use automount here so your setup may vary)
• Copy or rsync the old SGE cell to the new SGE location or another location if you symlink the cell as I do
• Save the old SGE configurations with save_sge_config.sh
• Copy over the saved configuration to the new location
• Perform upgrade on new install

1) Download SGE onto the new server. If you’re up for it, fill out the Planning Checklist.

2) Unzip, untar, an set $SGE_ROOT to your untar’ed folder.

OldCentOS# export SGE_ROOT=/directory/to/sge/

Note: You may consider putting SGE root in an NFS directory in case you want to create a “high availability” fail-over environment. NFS may very well slow you down.

3) Find save_sge_config.sh and copy it over to the old host.

4) Create a copy of your configuration using save_sge_config.sh

OldCentOS# mkdir sge_config_folder

OldCentOS# /path/to/save_sge_config.sh sge_config_folder

5) Copy over your config folder

6) Edit save_config_folder/cell/qmaster and change the old hostname (OldCentOS) to the new hostname (NewCentOS). Otherwise you’ll get an error like this:

Upgrade must be started on a qmaster host!

7) Run upgrade

NewCentOS# $SGE_ROOT/inst_sge -upd

Follow prompts. This is when you should reach for that planning checklist from step 1.

9) Be patient. Depending on the size your configuration, certain portions might take a long time.

10) Check your install

NewCentOS# ps -ef | grep sge

NewCentOS# qstat -f

[usage]

Throttling a job array of 20 to limit only 5 running at a time

$ qsub -t 1-20 -tc 5 test.sh