BOSCO Architecture. Derek Weitzel University of Nebraska Lincoln

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1 BOSCO Architecture Derek Weitzel University of Nebraska Lincoln

2 Goals We want an easy to use method for users to do computational research It should be easy to install, use, and maintain It should be simple for the user

3 Methods Use what s already at clusters - Their identity management - Their access methods Present a consistent interface to users If demand increases, expand organically, cluster to cluster

4 User Scenario 1 What they have: - A computer - Access to one cluster - Processing for their research What they want: - Simple job submission / management - Their processing to be completed now!

5 Technology Uses HTCondor job submission for user jobs Uses SSH to connect to clusters Uses Glite s BLAHP for interface to cluster scheduler Auto detection of remote cluster OS and appropriate BOSCO installation

6 Technology Bosco Submit Host NAT Bosco Submit Host SSH SSH PBS Cluster Login Node WN's

7 User Benefits from BOSCO 1. Throttled submission to remote cluster - Automatically detected 2. Job data transferred back to local computer after job completion 3. Do not care about remote OS version

8 User Scenario 2 What they have: - A computer - Access to one (or more) clusters - Processing for their research What they want: - Simple job submission / management - Their processing to be completed now!

9 Technology Everything as before plus Submit Glideins to remote clusters - Glideins are dynamic Condor worker nodes - Provides consistent interface for user jobs - Full output transferred back

10 User Benefits from BOSCO 2 1. Throttled submission to remote cluster - Automatically detected 2. Job data transferred back to local computer after job completion 3. Do not care about remote OS version 4. Transparent multi-cluster load balancing 5. Consistent interface to worker nodes 6. Ability to Flock remote Condor clusters

11 Bosco 2

12 Job Throttling In the current 1.1, we support detection and throttling of submitted jobs. Detects the number of jobs that can be submitted to a PBS cluster Uses Condor to throttle the number of jobs that can be submitted to that cluster

13 Job Data Transferred Job data is transferred back to submit host after job completion Important if further analysis is needed on the data

14 Mulit-Cluster Submitting glideins to multiple clusters at once Jobs can run at any cluster that starts the glideins Execution host matched after submission

15 Multi-OS Support Remote OS detected at install time BOSCO version installed from the cloud All OS s can communicate with each other through the GAHP protocol.

16 Requirements Requirements on clusters are limited - Running PBS, LSF, Condor, or SGE - Shared home file system - Outbound internet connectivity Requirements on submit host - For scenario 1, none - For scenario 2 Public IP address 1 port open (11000)

17 Compatibility Tested by Pegasus team to be compatible Can use Dagman workflow management If it can run on Condor, it can run on BOSCO

18 Bosco Breakdown What s it good for Personal Supercomputing assistant Submitting many jobs with same cores / memory Throttling submission to save the Scheduler Transferring data back and forth to YOUR workstation What it s not great at Submitting jobs with varying cores and memory requirements

19 Now Time for demo What could go wrong?

20 What just happened? Added 2 clusters - sandhills local EL6 condor cluster - ff-grid local EL5 PBS cluster Submitted jobs that ran at all 2 clusters, with no difference in the jobs.

21 What just happened? Factory submitted Glidein to cluster(s) PBS, SGE, Condor, LSF Cluster Worker Node BOSCO Submit Submit Glidein Login Node

22 What just happened? Cluster scheduled the Glidein on a worker node PBS, SGE, Condor, LSF Cluster Start Glidein Worker Node Glidein BOSCO Submit Login Node

23 What just happened? Glidein reports back to submit host for work PBS, SGE, Condor, LSF Cluster Ask For Job Worker Node Glidein BOSCO Submit Login Node

24 What just happened? BOSCO submit host starts a job on the cluster PBS, SGE, Condor, LSF Cluster Worker Node Glidein BOSCO Submit Login Node Job Start Job

25 BOSCO You can find out more at Now will take any questions

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