1. D0 computing @ NIKHEF

2. March 22, 2002D0/NL @ Nijmegen2 Amsterdam D0 farm (SAM station hoeve, node schuur) –2 servers, 50 dual cpu nodes –Used for MC production Triviaal (SAM station triviaal) –1 server, 2 dual cpu nodes –Used for tests (D0RACE workshop)

3. March 22, 2002D0/NL @ Nijmegen3 mcp10 p10.15

4. March 22, 2002D0/NL @ Nijmegen4 Nijmegen doesburg (SAM station nijmegen) –1 server, 3 dual cpu nodes ? –(to be) used for analysis

5. March 22, 2002D0/NL @ Nijmegen5 SAM Central analysis hoeve triviaal nijmegen sara robot fnal robot

6. March 22, 2002D0/NL @ Nijmegen6

7. March 22, 2002D0/NL @ Nijmegen7 SAM hoeve –v3_1_17 triviaal –v4_0_0_3 nijmegen –v3_2_18 ?

8. March 22, 2002D0/NL @ Nijmegen8 upgrades hoeve –RH 7.2 –ups/upd –sam –fbs nodes –RH 7.2 schuur –RH 7.2

9. March 22, 2002D0/NL @ Nijmegen9 Integration with grid At present separate clusters: –D0, LHCb, Alice, DAS cluster hoeve and schuur in farm network Replace fbs with pbs or condor Use EDG installation tool LCGF –Install d0 software with rpm Problem with sam (uses ups/upd)

10. March 22, 2002D0/NL @ Nijmegen10 Present network layout hoeve schuur switch node router hefnet surfnet

11. March 22, 2002D0/NL @ Nijmegen11 New network layout farmrouter switch D0LHCb hefnet lambda hoeve schuur alice

12. March 22, 2002D0/NL @ Nijmegen12 Use of hoeve MC production Analysis of root tuples –Cache tuples on schuur –Analyze tuples on desktop or farm node Recompilation of algorithms Software development

13. March 22, 2002D0/NL @ Nijmegen13 Conclusions Exchange experience –SAM –D0 software We need use cases