Summer @CERN

Karel Ha

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CERN

= international physics laboratory established in 1954

Mission:

Research Seeking and finding answers to questions about theUniverse

Technology Advancing the frontiers of technologyEducate Training the scientists of tomorrow

Collaborate Bringing nations together through science

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CERN

= international physics laboratory established in 1954

Mission:

Research Seeking and finding answers to questions about theUniverse

Technology Advancing the frontiers of technologyEducate Training the scientists of tomorrow

Collaborate Bringing nations together through science

2 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CERN

= international physics laboratory established in 1954

Mission:

Research Seeking and finding answers to questions about theUniverse

Technology Advancing the frontiers of technology

Educate Training the scientists of tomorrowCollaborate Bringing nations together through science

2 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CERN

= international physics laboratory established in 1954

Mission:

Research Seeking and finding answers to questions about theUniverse

Technology Advancing the frontiers of technologyEducate Training the scientists of tomorrow

Collaborate Bringing nations together through science

2 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CERN

= international physics laboratory established in 1954

Mission:

Research Seeking and finding answers to questions about theUniverse

Technology Advancing the frontiers of technologyEducate Training the scientists of tomorrow

Collaborate Bringing nations together through science

2 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Multinationality

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Inventions and discoveries

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Inventions and discoveries

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Inventions and discoveries

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Inventions and discoveries

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Inventions and discoveries

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Summer Student Programme

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Large Hadron Collider (LHC)

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

ATLAS

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

CMS

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Data Centre

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Data Centre

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

My work project

CERN archives 10 TBof physics data per day!

Data stored on tapes mustendure for decades!!

How to protect data on tape backend? - Add CRC checksums.

10 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

My work project

CERN archives 10 TBof physics data per day!

Data stored on tapes mustendure for decades!!

How to protect data on tape backend? - Add CRC checksums.

10 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

My work project

CERN archives 10 TBof physics data per day!

Data stored on tapes mustendure for decades!!

How to protect data on tape backend? - Add CRC checksums.

10 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

My work project

CERN archives 10 TBof physics data per day!

Data stored on tapes mustendure for decades!!

How to protect data on tape backend?

- Add CRC checksums.

10 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

My work project

CERN archives 10 TBof physics data per day!

Data stored on tapes mustendure for decades!!

How to protect data on tape backend? - Add CRC checksums.

10 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Cyclic Redundancy Check (CRC) protection

writing on tape (no CRC): 250 MB/swriting on tape (Reed-Solomon CRC algorithm): 130 MB/s

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Cyclic Redundancy Check (CRC) protection

writing on tape (no CRC): 250 MB/s

writing on tape (Reed-Solomon CRC algorithm): 130 MB/s

11 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Cyclic Redundancy Check (CRC) protection

writing on tape (no CRC): 250 MB/swriting on tape (Reed-Solomon CRC algorithm): 130 MB/s 11 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Cyclic Redundancy Check (CRC) protection

writing on tape (no CRC): 250 MB/swriting on tape (Reed-Solomon CRC algorithm): 130 MB/s 11 / 18

What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Multithreaded implementation

CRCs

Compute

Threads

Input

Ouput

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Tape-write on 4 cores with HyperThreading

0

50

100

150

200

250

300

0 2 4 6 8 10 12 14 16

MB

/s

n threads

Reed-Solomon on tpsrv212, output to tape

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Technology

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Environment

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Environment

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Environment

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

People

Data Storage and Services group photo

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

People

Data Storage and Services group photo

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Future is in...

for

Merci beaucoup :-)

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What is CERN? From quarks to bits Project on CRC protection Working @CERN Conclusion

Future is in...

for

Merci beaucoup :-)18 / 18