1. Computing WG highlights
September 8th 2011
P. Valente

2. Fibers/Network/Racks/Power (A. Gianoli)
Fibers document separated from the rest of the computing resources
Documents finalized (end of August)
Power requirements: 100 kW total
Racks
Racks on Jura side: 800 mm depth (standard CERN racks)
Racks on Saleve side: 1000 mm depth
Dimensions of racks’ base plate is needed (for the supports)
Power
Detailed estimate of power: 68 kW95 kW (adding more computing nodes: 35 racks)
Official request is 100 kW

3. L1/L2 farm design (J. Kunze)

4. Needs a powerful 10 Gb switch…
Issue of configuration/maintenance/integration with CERN network infrastructure

5. Back to the past: farm/network design evolution
Original scheme by M. Sozzi (until 2010)

6. Technical Design scheme (december 2010)
Large concentrating switch “downstairs”
Large switch/router for L1 and L2 “upstairs”
Separated switch and 10 Gb lines from downstairs for LKr (CREAM)

7. Latest design (april 2011)
No large switch “downstairs”, small concentrating (110 Gb) switches
2 switches “upstairs”, one for detector/L1 and one for L1+CREAM/L2

8. Tests of data transmission protocols (J. Kunze)

9. Tests of data transmission protocols (J. Kunze)
Time to setup a joint effort in TDAQ + Computing working groups in order to build a common data movement software

10. Define requirements for 2012 run

11. Final comments for 2012 run