Post on 23-Dec-2015
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