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lbaops:expres-specifications [2007/01/10 17:00]
chris.phillips
lbaops:expres-specifications [2015/12/18 16:38]
Line 1: Line 1:
-=====  EXPReS Specifications\\ ===== +
-\\ +
-====  Connectivity\\ ==== +
-\\ +
-The 3 ATNF telescopes are connected to Sydney via 1 Gbps "​lightpaths"​. This is shared with production traffic to the observatories.\\ +
-\\ +
-  *  Initial testing will be via standard AARNET route to Europe. This is via Singapore and uses 4x155 Mbps connections\\ +
-\\ +
-  *  Routing will then be changed to use the SX Transport 10 Gbps line via the USA. Given the increased RTT this may not give better TCP throughput\\ +
-\\ +
-\\ +
-====  Protocols\\ ==== +
-\\ +
-What protocol needs to be used for the transfers? TCP, UDP, VSI-e, something else?\\ +
-If anything other than TCP (or a similar reliable stream interface) is used then is a packet header format needed (so lost packets don't screw up the data stream).\\ +
-\\ +
-====  Data Format\\ ==== +
-\\ +
-The Mark5B "​file"​ format will be used. This consists of the raw baseband data with regular time headers and header CRC.\\ +
-\\ +
-  *  Will Mark5A+ or Mark5B playback be used for these tests. Mark5B playback does not used the CRC in the header so this makes the implementation a little easier.\\ +
-\\ +
-  *  Need to specify and agree on the "track assignment"​ and bit encoding used.\\ +
-\\ +
-====  Control\\ ==== +
-\\ +
-A thin Mark5(B?) client will be written which emulates a real Mark5 and directly controls the LBADR recorder. \\ +
-\\ +
-  *  Minimal Mark5 command set needs to be specified in sufficient detail for implementation.+
lbaops/expres-specifications.txt · Last modified: 2015/12/18 16:38 (external edit)