> On Jan 23, 2019, at 15:29, Ryan Huff <ryanh...@outlook.com> wrote:
>
> Thanks for responding!
>
> “Lowest resource usage” is the most specific info I’ve ever found. Is that
> just CPU, or Mem or IOPS or any combo? And which of the “resource” metrics
> take priority in the decision?
>
> Thanks,
>
> Ryan
>
>> On Jan 23, 2019, at 15:24, Jeffrey McHugh <jmch...@fidelus.com> wrote:
>>
>> From exp clustering guide:
>>
>> Neighboring Between Expressway Clusters
>> You can neighbor your local Expressway (or Expressway cluster) to a remote
>> Expressway cluster; this remote cluster could be a neighbor, traversal
>> client, or traversal server to your local Expressway. In this case, when a
>> call is received on your local Expressway and is passed via the relevant
>> zone to the remote cluster, it will be routed to whichever peer in that
>> neighboring cluster has the lowest resource usage. That peer will then
>> forward the call as appropriate to one of its:
>> ■
>> locally registered endpoints (if the endpoint is registered to that peer)
>> ■
>> peers (if the endpoint is registered to another peer in that cluster)
>> ■
>> external zones (if the endpoint has been located elsewhere)
>> For Expressway: Lowest resource usage is determined by comparing the number
>> of available media sessions (maximum - current use) on the peers, and
>> choosing the peer with the highest number. Peers that are in maintenance
>> mode are not considered
>>
>>
>> Jeffrey McHugh | Sr. Collaboration Consulting Engineer
>>
>> Fidelus Technologies, LLC
>> Named Best UC Provider in the USA
>> 240 West 35th Street, 6th Floor, New York, NY 10001
>> +1-212-616-7801 office | +1-212-616-7850 fax |
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>> -----Original Message-----
>> From: cisco-voip <cisco-voip-boun...@puck.nether.net> On Behalf Of Ryan Huff
>> Sent: Wednesday, January 23, 2019 3:19 PM
>> To: cisco-voip@puck.nether.net
>> Subject: [EXT] [cisco-voip] Expressway cluster algorithm
>>
>> Can anyone explain or cite the documents that define the algorithm used to
>> determine which Expressway node in a given cluster is selected to process a
>> call.
>>
>> You can influence the selection with DNS SRV priority and weight, but does
>> not appear to guarantee which cluster node is selected each time.
>>
>> Thanks,
>>
>> Ryan
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