1. EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org Introduction to P-GRADE Portal hands-on Miklos Kozlovszky MTA SZTAKI m.kozlovszky@sztaki.hu www.portal.p-grade.hu pgportal@lpds.sztaki.hu

2. EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org Step 1. Download the tutorial sheets from the web http://indico.in2p3.fr/conferenceDisplay.py?confId=1265 Step 2. Open the tutorial sheets on your desktop

3. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 3 P-GRADE Portal (SZTAKI, Budapest) based on v2. 7 Infrastructure Client machines Proxy download GILDA Grid services GILDA MyProxy server gLite Proxy MyProxy name: PARISxx MyProxy password: portal.p-grade.hu/multi-grid

4. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 4 Tutorial 1, Exercise 1 Import and execute a pre-defined application Traffic simulation Generates the road network map of Manchester Put traffic lights and cars on the map. Simulate road traffic. Compares and visualizes the density of cars

5. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 5 Tutorial 1, Exercise 2 Create a matrix multiplication workflow (one job workflow) Job executable: C code, compiled on GILDA UI Expects command line parameters: M V Knows nothing about the grid Job input/output files: Program reads matrixes from two files called INPUT1 and INPUT2 Program writes result matrix into file called OUTPUT Local execution on a PC:./multiply M V Task: Execute the program on EGEE, transfer input and output files in Sandboxes from the client 3 3 2 1 3 1 1 1 3 3 3 binary INPUT1 3 3 5 2 7 6 7 9 3 8 2 INPUT2 3 3 25 35 29 14 17 18 42 51 54 OUTPUT

6. EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org Portal accounts: user01 – user40 use your number Portal passwords: Proxy download information (login to GILDA): Hostname: grid001.ct.infn.it use your number Port: 7512 Account: user01 Password: Login to Portal: No need to wait for jobs to finish – proceed to next exercise

7. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 7 User authentication MyProxy server P-GRADE Portal server GILDA services Proxy VOMS server Proxy VOMS ext. Proxy VOMS ext. PARISxx Password userXX Proxy based authentication Login & password based authentication Tutors generated and uploaded your proxy

8. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 8 Job level fault tolerance Tips Exclude erroneous sites from the brokering process: 1.Open the JDL editor of the job 2.Write other.GlueCEInfoHostname != “hostname” into the “Ranks & requirements” window Automatic job resubmission: 1.Add ShallowRetryCount = 3 into JDL