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From Jeremy Payne <>
Subject Re: Cache sharing between siblings
Date Wed, 17 Jan 2018 19:36:15 GMT
I've been thinking about this, but you can use current parent
functionality to perform local node(edge) object lookups.
It's a hack and requires careful configuration of your remap and
parent configuration so to not end up in a cache loop
or end up storing duplicate copies.. but it is a doable workaround in
the absence of some type of clustering(CARP, etc).

On Thu, Nov 23, 2017 at 10:38 AM, Alan Carroll <> wrote:
> Sorry for the delay, and thanks Dave for answering. This is a feature under
> active development. Oath internally uses a plugin that implements CARP for
> sharing across a pod. We are trying to open source it but it's currently too
> flaky to support externally. We are working on improving it to the point
> where it can be open sourced without embarrassment. In the longer run,
> however, there is a "Layer 7 Routing" project (also known as "Next Hop")
> which you can track here -
> On Thu, Nov 23, 2017 at 9:53 AM, David Carlin <> wrote:
>> ATS doesn't have this functionality currently.  I know a couple companies
>> are working on it, but nothing to contribute to open source yet as far as I
>> know.
>> David
>> On Thu, Nov 23, 2017 at 9:15 AM, Veiko Kukk <> wrote:
>>> Hi again,
>>> Are there any better lists/forums to ask such questions?
>>> Regards,
>>> Veiko
>>> 2017-11-15 11:07 GMT+02:00 Veiko Kukk <>:
>>>> Hi,
>>>> I'm new to ATS, so far we've been using Squid, but due to it's
>>>> instability are moving away.
>>>> I'm interested in avoiding regional cache duplication in CDN system.
>>>> Currently, we have several Squid servers working as siblings and only
>>>> pulling from origin if none of them has the object in cache, if sibling has
>>>> object in cache, it's pulled from sibling but not stored locally. Only new
>>>> content fetched from origin is store locally. Sibling lookup is done via
>>>> and has been working quite well so far.
>>>> Is similar setup possible with ATS?
>>>> I found no information in documentation how to configure siblings (only
>>>> parent configuration is documented). Could you point me to right direction?
>>>> Regards,
>>>> Veiko

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