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If there are two hosts are availeble for NQS.
Add .rhosts under home directory of user for hosts identification.
<hostname1> <username1>
<hostname2> <username1>
NFS is needed for Parallel EGSnrc.
There are three batch processing options in BEAMnrc, short 20 min, medium 2 hours, and long 40 days. Here is the configuration for short. Host host1 runs as server and also as processing node. Its configuraion is,
# for short, run limit is 2 because only 2 processors on each host
qmgr create batch short-dest pipeonly run_limit=2 user_limit=2
qmgr set per_process cpu_limit = \( 0:20:0 \) short-dest
# highest priority for short-dest
qmgr set priority = 40 short-dest
########running part of nqs ##########
###### gate of short #######
qmgr create pipe short-in pipeonly run_limit=2 destination=short-dest
qmgr set lb_in short-in
###### end of gate ########
qmgr set scheduler host1
qmgr create pipe short destination=short-scheduler@host1
####### pipe of short #########
####### server side ########
# under Mgr As Server, add two destinations
create pipe short-scheduler run_limit=20 destination=(short-in@host1,short-in@host2)
qmgr set lb_out short-scheduler
For host2, which runs a processing node, it does not need to have the server side configuration. For medium and long, just change the name and parameters.
First of all download the package.
Follow the instructions to install NQS locally. It is installed as standalone version.
Use nmapmgr to add host node,
> add host node
> add alias name node
> list
> exit
Use root to start NQS, qmgr start nqs
Create batch queues:
> qmgr create batch_queue short
> qmgr create batch_queue medium
> qmgr create batch_queue long
Specify CPU time:
> qmgr set per_process cpu_limit = \( 2:0:0 \) short
> qmgr set per_process cpu_limit = \( 8:0:0 \) medium
> qmgr set per_process cpu_limit = \( 24:0:0 \) long
Set up priority and runlimits:
> qmgr set priority = 40 short
> qmgr set priority = 30 medium
> qmgr set priority = 20 long
> qmgr set run_limit = 5 short
> qmgr set run_limit = 4 medium
> qmgr set run_limit = 2 long
Set up user limit:
> qmgr set user_limit = 2 short
> qmgr set user_limit = 1 medium
> qmgr set user_limit = 1 long
So far the configuration is done. Queues need to be enabled and started.
qmgr enable queue
qmgr start queue
Now we can submit tasks to the system.
qsub -eo -r what -q short something.sh
The tasks will start to run on the processor(s) if there is any available.
If you are running at a dual-processor or dual-core system, you could see the change of the performance.Edit /etc/exports file on sourcePC:
# two machines which share files under /nfsdir
/nfsdir sourcePC(rw) destPC(rw)
sourcePC is the PC which runs NFS server and shared files are stored under /nfsdir.
For security, add two files under /etc, hosts.deny and hosts.allow:
#hosts.deny
portmap:ALL
lockd:ALL
mountd:ALL
rquotad:ALL
statd:ALL
#hosts.allow
service: sourcePC , destPC
#sourcePC 192.168.10.2; destPC 192.168.10.3
portmap: 192.168.10.2 , 192.168.10.3
lockd: 192.168.10.2 , 192.168.10.3
rquotad: 192.168.10.2 , 192.168.10.3
mountd: 192.168.10.2 , 192.168.10.3
statd: 192.168.10.2 , 192.168.10.3
Start NFS server by /etc/init.d/nfs-kernel-server start
Check the status of NFS, rpcinfo -p.
Go to destPC. To view the contents of /nfsdir on sourcePC, mount remote directory first.
sudo mount sourcePC:/nfsdir /nfsdir
Now the contents of /nfsdir on sourcePC could be available on destPC.
Here is a link about NFS.