...
MWAX comprises 24 new servers (+ 2 spares) and repurposes 10 of the existing servers on site at the MRO, occupying three racks. It makes use of the existing 100 Gbps fibre-optic link from site to the ten existing storage servers located in B206 on Curtin Campus. These ten servers will buffer MWA data pending transfer via a 100 Gbps fibre-optic link from B206 to the Pawsey Supercomputing Centre.
This configuration is capable of simultaneous fine channelisation, cross-correlation, frequency/time averaging, and buffer storage for up to 256 tiles . In addition to the support for twice the inputs / and up to 24 coarse channels of 1.28 MHz each. This represents twice the number of inputs and four times the number of output visibilities , the MWAX correlator offers a number of improvements over the compared wuth the legacy system. At the time of writing, MWA has 16 receivers, which process 128 tiles in total. This limits the input to MWAX, such that it only presently correlates 128 tiles, despite being capable of 256.
The MWAX correlator design employs a multicast architecture, allowing all receivers to each send their streams of high time resolution data to any number of multicast consumers with no additional load on the sender. Initially there will be 24 multicast receivers (one for each coarse channel for correlation and voltage capture), however, the multicast architecture allows for additional multicast receivers to utilize the same high time resolution data for other purposes. For example: RFI monitoring, transient detection and external instruments such as Breakthrough: Listen could commensally consume some or all of the high time resolution data without impacting the operation of the telescope.
...