1. Building a Massive Virtual Screening using Grid Infrastructure Chak Sangma Centre for Cheminformatics Kasetsart University Putchong Uthayopas High Performance Computing and Networking Center, Kasetsart University

2. Motivation Thailand’s Medicinal Plants is important for Thai society –Over 1,000 species –Over 200,000 compounds –Multiple disease targets Problem –No complete collection of compounds database –The practice is still mostly rely on local knowledge and conventional wisdom –Lack of systematic verifications by scientific methods SIATIC PENNYWORT Bariena lunulina Linae

3. Kasetsart University Thai Medicinal Plants Effort Led by Center for Cheminformatics, Kasetsart University (Dr. Chak Sangma) Goal –Establish Thai medicinal plant knowledgebase by building 3D molecular database –Employ Virtual Screening to verify active compounds with conventional knowledge

4. 2D Structures Optimized 3D Structures with GAMESS Calculated Binding Energy with Autodock 3.0 Reports and Literatures Structure in 0.5 Å from Binding Site Results SOM Neural Network Map Approximated 3D Structures Compute Intensive!

5. ThaiGrid Drug Design Portal Partners –High Performance Computing and networking Center, KU –Center for Cheminfomatics, KU –IBM Thailand Goal –Building a virtual screening infrastructure on ThaiGrid System –Start from KU campus Grid and extended to other ThaiGrid partner universities later Link –http://tgcc.cpe.ku.ac.th –http://www.thaigrid.net

6. Challenge Recent project for National Center for Genetic Engineering and Biotechnology, Thailand –Screen 3000 compounds in 3 months Computation time on 2.4 GHz Pentium IV 4 system –Over 30 mins/1 optimized structure –Over 30 mins/1 docking Estimate computing time on single processor –(3,000 x 30) + (3,000 x 30) –3,000 Hours –125 Days –4 month 16 days Not fast enough!

7. Key Technologies Three key technologies must be combined to provide the solution –Cluster Computing –Grid Computing –Portal Technology

8. What we want to do? Hide the complexity of Grid and computational chemistry software from scientists while providing massive computational power needed

9. Infrastructure ThaiGrid infrastructure are used 10 Clusters from 6 organizations –AMATA – KU –GASS – KU –MAEKA – KU –WARINE – KU –CAMETA – SUT –OPTIMA - AIT –ENQUEUE – KMUTNB –PALM – KMUTNB –SPIRIT – CU –INCA - KMUTT 158 CPUs on 110 nodes

10. Software Architecture Each cluster has local scheduler –SGE, OpenPBS, Condor can be used –We use our SQMS scheduler Globus2.4 is used as middleware –Resources control and security (GSI) Grid level scheduler control multi-cluster job submission –Use KU own SQMS/G AMATA KU Gigabit Campus Network Warine GASS Maeka Globus 2.4 SQMS SQMS/G Portal SCMSWeb

11. The Portal Roles –User interface –Automate execution flow –File access and management Features –Create project –Add ligand, enzyme –Submit screening job, monitor job status –Download output Current portal is built using Plone –http://www.plone.org/ –Python based web content management –Flexible and extensible

12. How things work! Compute Resource Compute Resource Compute Resource Compute Resource Compute Resource KU Campus network Resource Broker (SQMS/G) Portal Grid Middleware Globus2.4 Task Monitor

13. Results The first version of compound databases (around 3,000 compounds) 3,000 compounds screened ( found 30 high potential compounds) –4 drug targets (Influenza, HIV-RT, HIV-PR, HIV-IN) XK-263

14. Experiences Some files such as enzyme structure and output are very large. –Require a good bandwidth between sites –Some simple optimizing techniques can help Implements caching of enzyme structure file at target hosts. Substantially reduce the number of transfer needed Batch scheduling approach is good if the systems are very homogenous – Allow dynamic execution code staging to the target host without installation/recompilation Many script tools must be developed to –Streamline the execution –Handling data and code staging –Cleanup the execution

15. Next Generation Massive Screening on Grid Move to Service Oriented Grid –Use Grid and Web services to encapsulate key applications –Build broker and service discovery infrastructure –Rely heavily on OGSA and GT3.X, 4.X Portlet based portal –JSR 168: Portlet Specification compliance –More modular, customizable, flexible –Plan to adopt GridShpere from gridlab (www.gridlab.org)www.gridlab.org Use database as backend instead of files –OGSA DAI might be used for data access

16. Progress We are working on –New portal using GridSphere technology (done, testing) –Service wrapper for lagacy code Gamess, autodock (done, testing) –MMJFS interface ( progress) –OGSA DAI integration (progress) –Service Registration and Discovery (partial) –Broker System ( design) –New Monitoring (done) Schedule –Finish and testing Jan-Feb 2005 –Deploy in March 2005

17. Scheduler MMJFS Gamess Service Gamess File Server Portal Portlet OGSA DAI Broker Server Registration Server Backend DB Molecular DB Grid Ftp

18. Design Choices Mass Data Transportation across site –Central ftp server is used to store data/database –Each compute node can pull required data from this ftp Adhoc – ftp, wget/http (firewall friendly) Next – Grid ftp Cluster/ Single server –Gridify using service wrapper to expose grid service of that lagacy application to the grid –Not working for cluster since compute node are hidden behind head node Back to MMJFS interface that talk to local shceduler

19. Design Choices Service Discovery Mechanism –Publish/subscribe model Service advertising interface/protocol Backend data based that shared between registration service component and broker component Adoption of Grid Notification service and model –Available from mygrid project, seems to be useful for more dynamics environment –Scalability…. Broker Service Registration Service Discovery (SQL)

20. Job Submission Job Status Result visualization

21. System Status Performance Record Job Queue Monitoring

22. Service Discovery

23. Conclusion Grid and cluster computing is a key technology that can give us the power. Grid works if use wisely! Challenges –Grid standard is still rapidly evolving Things change before you can finish! –Difficult to configure, maintain, Some part is still unstable –Firewall and security concern –Lack of manpower with expertise Opportunity –Secure infrastructure –Cost reduction by the integration of networked resources on demand

24. Acknowledgement HPCNC Team –Somsak Sriprayoonsakul –Nuttaphon Thangkittisuwan –Thanakit Petchprasan –Isiriya Paireepairit

25. The End

26. Backup

27. Process 2D Structure 3D Structure GAMESS Molecular Structure Database Optimized 3D Structure Enzyme Enzyme Grid Autodock GAMESS SOM Neural Network Analysis Results GRID

28. Grid Middleware (OGSA ) Grid Portal Molecule Database Docking Services Resources ( Computer, Network) Optimizing Services OGSA DAI Monitoring Services Portlet Workflow Engine Broker Services Portlet