CKM 26 Feb 2002

Triggerless DAQ Architecture

CKM 26 Feb 2002

Switch-based DAQ Operation (buffers)

8

9

10

11

4

9

10

11

4

9

6

11

0

5

6

7

0

1

6

7

0

1

2

3

8

9

10

11

8

5

6

11

4

5

2

11

4

1

2

7

4

1

2

3

0

1

2

3

8

9

10

11

8

9

10

7

8

5

10

3

4

5

6

3

0

5

2

3

0

1

2

3

8

9

10

11

4

9

6

11

0

5

6

7

0

5

6

7

0

1

6

7

0

1

2

3

8 4 4 0 0 0

8 8 4 4 4 0

8 8 8 4 0 0

8 4 0 0 0 0

9 9 9 5 1 1

9 5 5 1 1 1

9 9 5 5 5 1

9 9 5 5 1 1

10 10 6 6 6 2

10 6 2 2 2 2

10 10 10 6 2 2

10 6 6 6 6 2

11 11 11 7 7 3

11 11 11 7 3 3

11 7 3 3 3 3

11 11 7 7 7 3

CKM 26 Feb 2002

…

Front-end Boards

MUX/Buffers

Processors

Switch

Switch-based DAQ Architecture

CKM 26 Feb 2002

Cost

Packaging

Switch Utilization

Off the Shelf Components

CKM 26 Feb 2002

…

Front-end Boards / Buffers

Processors

Switch

Alternate Switch-based DAQ Architecture

CKM 26 Feb 2002

CKM 26 Feb 2002

192 port Gigabit Ethernet Switch

$240K

~10 GBytes/sec

CKM 26 Feb 2002

Processors

Switches

Parallel DAQ Branches

(reduced switch costs)

Front-end Boards / Buffers

… …

CKM 26 Feb 2002

“192 port” Gigabit Ethernet Switch(8 X 24 ports, no cross-connects)

$52K

~10 GBytes/sec

                               

CKM 26 Feb 2002

16 port Gigabit Switch - $1300

PCI Gigabit Ethernet Adapter - $35

PMC Gigabit Ethernet Adapter - $600

Miscellaneous

32 port Gigabit Switch - $6400

CKM 26 Feb 2002

ProcessorGigabit Ethernet Adaptor

Serial Ring I/F

CKM 26 Feb 2002

PCI Test Adapter

CKM 26 Feb 2002

                       

Commercial Ring Interconnects

3GIO

(GigaBridge)

CKM 26 Feb 2002

Some DAQ Cost Estimates

Example system (1000 processors, 20 GBytes/sec)

1000 PCs $700K

1000 Serial Ring Adapters $200K

1000 Gigabit Ethernet Adapters $ 50K

85 Gigabit Ethernet Switches (16 port) $100K

16 Gigabit Ethernet Switches (32 port) $100K

Cables, etc $ 50K

Total ~ $1.2M

CKM 26 Feb 2002

Conclusion

“Triggerless” DAQ architecture for CKM seems both reasonable and affordable

ESE Department is very much interested in participating in CKM DAQ development