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From John Rushford <jjrushf...@gmail.com>
Subject Re: Redundant origin server support
Date Sat, 23 Dec 2017 16:52:27 GMT
We use parent.config to provide redundancy and load balance over origins.
See here for info on configuring parent.config.  

https://docs.trafficserver.apache.org/en/latest/admin-guide/files/parent.config.en.html?highlight=parent%20config#std:configfile-parent.config
<https://docs.trafficserver.apache.org/en/latest/admin-guide/files/parent.config.en.html?highlight=parent%20config#std:configfile-parent.config>

> On Dec 23, 2017, at 9:28 AM, Miles Libbey <mlibbey@apache.org> wrote:
> 
> On Sat, Dec 23, 2017 at 8:16 AM, Alan Carroll <solidwallofcode@oath.com> wrote:
>> You can also use DNS round robin along with setting the server retries to a
>> non-zero value.
> 
> Will that "save" the first request to the dead origin? (or would the
> error make its way back to the user?)
> 
>> On Sat, Dec 23, 2017 at 10:07 AM, Leif Hedstrom <zwoop@apache.org> wrote:
>>> 
>>> Yeh you can do this with parent.config or possibly the escalate plugin.
> 
> The escalate plugin works on missing objects, not dead servers. For
> instance, perhaps origin1 periodically gets its data from
> masterorigin, but, sometimes fails. The escalate plugin would have you
> go to masterorigin when origin1 said it didn't have the content.
> 
>>> I’d favor the former if possible, it has a new feature to go to an
>>> alternative parent/origin on specified errors, as well as load balancing
>>> etc.
>>> 
>>> — Leif
>>> 
>>> On Dec 23, 2017, at 5:51 AM, Burak Sarp <sarp_burak@yahoo.com> wrote:
>>> 
>>> Hi all,
>>> 
>>> Is there any way to cover origin server failover cases on ATS ?
>>> 
>>> I mean if origin server is down, ATS will try another origin server..
>>> 
>>> Thanks,
>>> Sarp
>> 
>> 


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