1. gLite Job Management Christos Theodosiou (ctheodos@grid.auth.gr)
User and Application Support
Scientific Computing AUTH

2. Overview Description of Grid Infrastructure Design of a batch job
Submission and Management of a job
Two basic examples

3. Grid core services

4. Grid clusters

5. Job life cycle

6. Job life cycle

7. New proxy certificate creation with12 hours lifetime
Proxy creation
voms-proxy-init -voms <VO>
New proxy certificate creation with12 hours lifetime

8. Job preparation Create executable file[s]
Collect necessary input files
Create .jdl file

9. Simple example Simple job.jdl sample.
Executable = "/bin/hostname"; Arguments = "-f"; StdOutput = "std.out"; StdError = "std.err"; OutputSandbox = {"std.err","std.out"};
Simple job.jdl sample.

10. Job Submission Find available resources for .jdl Submit job
Check job status
Retrieve output

11. List matching resources
glite-wms-job-list-match -a job.jdl
List all available resources that match the prescribed .jdl

12. JobID file contains unique ID of the submitted job
Job submission
glite-wms-job-submit -a -o JobID first.jdl
JobID file contains unique ID of the submitted job

13. Status check
glite-wms-job-status -i JobID
JobID file created in submission Possible values of status: Waiting, Ready, Running, Aborted, Canceled, Done, Clear.

14. JobID file created in submission Change status value to Canceled.
Job cancellation
glite-wms-job-cancel -i JobID
JobID file created in submission Change status value to Canceled.

15. Output retrieval
glite-wms-job-output -i JobID --dir results
The files defined by OutputSandbox variable in .jdl (i.e. "std.err","std.out") will be stored in results directory.

16. Prints the name of the worker node of the Job. $ wn036.grid.auth.gr
Output check
cat results/std.out
Prints the name of the worker node of the Job. $ wn036.grid.auth.gr

17. A script job needed to be executed
An other example
#!/bin/bash # Print Coordinated Universal Time date --utc # Print the name of the host hostname -f
A script job needed to be executed

18. InputSandbox variable added.
An other example
Executable = "script.sh"; InputSandbox = {"script.sh"}; StdOutput = "std.out"; StdError = "std.err"; OutputSandbox = {"std.err","std.out"};
InputSandbox variable added.

19. Job Submission (..again)
Find available resources for .jdl
Submit job
Check job status
Retrieve output
glite-wms-job-list-match -a job.jdl
glite-wms-job-submit -a -o NewJobID job.jdl
glite-wms-job-status -i NewJobID
glite-wms-job-output -i NewJobID --dir new_results

20. Output check Wed May 20 09:23:20 UTC 2011 wn031.grid.auth.gr
cat new_results/std.out
Wed May 20 09:23:20 UTC 2011
wn031.grid.auth.gr