EXPReS/Fabric Data
Acquisition System

Jouko Ritakari

Jouko.Ritakari@hut.fi

Three options

Recycle old junk

Develop the PCEVN further

Move to new technologies (eg. iBOB)

Recycling old junk

Pros:

Everybody has an 20-year-old Mk4 or 15-year-old VLBA data acquisition rack

The PCEVN is good enough for these

The PCEVN has significant advantages for eVLBI

Cons:

Old DARs are falling apart, no upgrade path

Nothing new, except working eVLBI

Developing PCEVN further

Pros:

Working design, upgrade to 4Gbit/s possible

Interoperable with DBE or DBBC or old systems

Cons:

4-lane PCIe chips not available yet

VSI is at end of life cycle, should be phased out

Some work is involved

Moving to iBOB and 10Gbps Ethernets

Hardware-assisted UDP/IP packetizer

On-chip Linux needed only for initialization and retransmissions

The network distributes the data to correlating computers

iBOB pros and cons

Pros:

Easy upgrade to multi-Gbps systems

Easy upgrade to distributed software correlation

Rate-based protocols easier with FPGAs than CPUs

Cons:

VHDL programming not always fun

10Gbps Ethernet firmware ETA 3Q/4Q 2006

Business Venture

Presentation for a new business venture

Jouko Ritakari

2002-01-30T12:30:02

Jouko Ritakari