Establishing a Proxy Host
In order for GEMM to deploy additional compute and access hosts and perform
monitoring, you must choose a host from the Sun Control Station as an N1GE Admin Host.
This host must remain as an N1GE admin host as long as GEMM is in use. You may choose
a system which will be a compute host as well or you may choose a system which will
only be an access host. This choice is determined by factors such as:
Security concerns about a compute host having admin privileges ---
this factor depends upon your established policy for using N1GE.
Concerns about monitoring being impacted by compute tasks --- by default
the monitoring command runs once a minute on the chosen host, which probably will
not have a large impact unless the host is running a very resource-intensive job.
Permanence - The host you choose must be one which you do not expect
to take down ever during the course of running GEMM, otherwise monitoring and deployments
will not work
Once you have decided which host to make the admin host,
then perform these steps:
Set this host as the proxy host as previously described.
On the master host, add this host to the list of admin hosts. You
can add the host using the N1GE GUI or add it from the command line by using the N1GE qconf -ah command.
Deploying the Chosen Proxy Host as a Compute or Access
At this point, click the Install Host menu item, select the chosen proxy, and
install it as a compute or access host. You must select only the chosen proxy host
and no other host in this step. You must wait to deploy additional hosts until the
proxy host has been successfully established.
Uninstalling Hosts
From the Grid Engine main page you have two uninstall choices. You can uninstall
a particular host or hosts or you can uninstall everything.
To Uninstall Hosts
You can remove one or more compute hosts from the compute grid.
When you uninstall a compute host, the N1GE software is shut down and removed
from the selected hosts. The N1GE master host is instructed to remove those compute
hosts from the N1GE compute grid.
Note - Before you start the uninstall procedure, ensure that no jobs are running
on the compute hosts that you want to uninstall. Any jobs that are currently running
on these hosts will be terminated. If the jobs are marked as "re-runnable",
they are automatically resubmitted to the N1GE compute grid for execution on another
compute host(s). However, if they are marked as "not re-runnable," then
they are not rescheduled and are not automatically executed elsewhere.
StepsSelect Grid Engine > Uninstall Host. The selector appears, displaying the list of hosts currently in the compute
grid; see Uninstalling Hosts.
Click to highlight a host(s). You can also click Select All at the top to choose all hosts in the list.
Click Uninstall Selected Nodes in the
bottom right corner. The Uninstall Task Progress Dialog appears.
Figure 1-29 Select Nodes to Uninstall Page

To Uninstall Everything
You can remove all components of the Grid Engine module from the master host
and all compute hosts.
Before you uninstall everything, be aware that:
all jobs (both running and suspended) are killed
all pending jobs are lost
all configurations and all records of previously run jobs are lost.
To uninstall everything:
StepsSelect Grid Engine > Uninstall Everything. A screen appears, explaining the Uninstall Everything feature.
Figure 1-30 Uninstall Completely Dialog

Click Uninstall Master Host and ALL Compute Hosts. The Task
Progress dialog appears.
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