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I can easily get rates from the New release UDP stream using winsockets, but for some reason I can't get any rates using aeron. I am using the RateSubscriber project and the following URI:

const static std::string DEFAULT_CHANNEL = "aeron:udp?endpoint=224.0.28.1:14310";

When I run my code (after I started aeronmd.exe of course) I dont receive any rates:

Subscribing to channel aeron:udp?endpoint=224.0.28.1:14310 on Stream ID 10
Subscription: aeron:udp?endpoint=224.0.28.1:14310 22:10
0 msgs/sec, 0 bytes/sec, totals 0 messages 0 MB payloads
0 msgs/sec, 0 bytes/sec, totals 0 messages 0 MB payloads
0 msgs/sec, 0 bytes/sec, totals 0 messages 0 MB payloads
0 msgs/sec, 0 bytes/sec, totals 0 messages 0 MB payloads
Shutting down...

What am I doing wrong? Do I need to run something else?

Thank you!

Mohamed Bdr
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Jerome
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1 Answers1

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For Aeron to subscribe to a multicast publication then you need to specify the interface in the URI in addition to endpoint. Also, are you sure the published data is using the Aeron transport protocol?

Martin Thompson
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  • Thanks Martin for the quick reply. I also tried to use: const static std::string DEFAULT_CHANNEL = "aeron:udp?endpoint=224.0.28.1:14310|interface=localhost"; with the same result. The USD endpoint I use is the standard CME address they give in their config.xml. How can I "wrap" that CME stream in an Aeron transport protocol? Should I first create a publisher that reads the CME stream, wraps it in an AERON stream and then read it in my subscriber? – Jerome Feb 08 '21 at 15:50
  • What config.xml? If you are talking about CME market data then this is not Aeron. – Martin Thompson Feb 08 '21 at 16:43
  • The interface URI param for Aeron should be the local interface address you wish to listen on. However, I believe this is separate to the issue you are experiencing. – Martin Thompson Feb 08 '21 at 17:06
  • Thanks Martin. I think I misunderstood the purpose of Aeron. I assumed that the CME was delivering the packets in a ready for Aeron to use format and that the "publication app" was the CME, not just an IPC. Is that correct? – Jerome Feb 08 '21 at 19:55
  • You should contact your account manager at the CME and discuss how it works. Aeron is a message transport independent from the CME. – Martin Thompson Feb 09 '21 at 14:04