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<p class="MsoNormal">We are running load capacity tests using Amazon AWS configurations.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For the tests, we are basically scaling up calls to a second Asterisk box. First box that is calling the second box plays music on hold for 60 seconds, then hangs up the call.<o:p></o:p></p>
<p class="MsoNormal">My initial thought was jitter problems, but that doesn’t seem to be the case.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I believe I found the cause while looking at the asterisk logs. I am finding hundreds of entries like this when they report audio problems.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[08/19 15:04:17.176] DEBUG[4062][C-00000076] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 4 instead<o:p></o:p></p>
<p class="MsoNormal">[08/19 15:04:17.173] DEBUG[4008][C-0000005b] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 3 instead<o:p></o:p></p>
<p class="MsoNormal">[08/19 15:04:17.180] DEBUG[4008][C-0000005b] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 2 instead<o:p></o:p></p>
<p class="MsoNormal">[08/19 15:04:17.174] DEBUG[3933][C-00000038] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 2 instead<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I see references where people say to make sure to set VMWare ESXi Latency Sensitivity to high for issues like this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, I am told there is no such setting with Amazon AWS. It sounds like the settings are all based on the type of configuration you buy.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have any experience running Asterisk on an Amazon AWS system?<o:p></o:p></p>
<p class="MsoNormal">If so, what type of Amazon AWS configuration are you using?<o:p></o:p></p>
<p class="MsoNormal">If you have the potential to be playing prompts and/or music on hold for all channels at once, what is you channel capacity?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is it recommended to run on dedicated hardware when encountering issues like this?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Have a great day!<o:p></o:p></p>
<p class="MsoNormal">Dan<o:p></o:p></p>
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