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Focusing on the first beams CHEP 2006 TIFR, Mumbai 15 February 2006. Jamie Shiers on Monday gave a view of how ready we are for the start-up of LHC This talk puts the LCG service into the context of the evolving HEP and scientific computing environment ..
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15 February 2006
This talk puts the LCG service into the context of the evolving HEP and scientific computing environment ..
.. looks at where our expectations were and were not fulfilled
.. and outlines where we need to focus our efforts now as we prepare for the first beams
Prepare and deploy the LHC computing environmentto help the experiments analyse the datacoming from the detectors
With a significant Funding Principle – LHC computing resources will NOT be centralised at CERN
And a few external constraints
--A bit of history
science grid infrastructures
EGEE - Enabling Grids for E-Science
OSG - US Open Science Grid
>20 applications from 7 domains
Another 8 applications from
4 domains are in evaluation stage
GRID in 1996!Processing & Storage Technology – Expectation v. Reality
Some of the predictions of PASTA I – 1996
“.. it should be possible to build a useful distributed architecture computing system provided the availability of CERN->Tier-1 Regional Centre network bandwidth is of the order of 622 Mbps per Regional Centre. This is an important result, as all the projections for the future indicate that such connections should be commonplace in 2005.”
Wide Area Network
T2s and T1s are inter-connectedby the general purpose researchnetworks
Any Tier-2 may
access data at
Dedicated10 Gbit links
Each T1 with
~10 Gbps to
the local NREN
.. it has taken longer than we expected to get to a basic computing service that is reasonably reliable
HEP Grid on the CHEP timeline
number of sites passing the SFT tests
Log data lostService Metrics
Now – 2006 - we must be very clear about the priorities
to be agreed
& completedin the nextfew months
then - testeddeployed
Subject to progress& experience
test and deployment
reliable operation of the baseline services