Re: Cache sharing between siblings

[Jeremy Payne <jp...@gmail.com>]

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 <so...@oath.com> 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 -
> https://github.com/apache/trafficserver/projects/7
>
> On Thu, Nov 23, 2017 at 9:53 AM, David Carlin <dc...@oath.com> 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 <ve...@gmail.com> 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 <ve...@gmail.com>:
>>>>
>>>> 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 ICP
>>>> 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
>>>>
>>>
>>
>

Re: Cache sharing between siblings

[Jeremy Payne <jp...@gmail.com>]

btw... i'll add a lesson learned post to my wiki..
give me a couple days to clean up lab details.. :-)




On Wed, Jan 17, 2018 at 1:36 PM, Jeremy Payne <jp...@gmail.com> wrote:
> 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 <so...@oath.com> 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 -
>> https://github.com/apache/trafficserver/projects/7
>>
>> On Thu, Nov 23, 2017 at 9:53 AM, David Carlin <dc...@oath.com> 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 <ve...@gmail.com> 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 <ve...@gmail.com>:
>>>>>
>>>>> 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 ICP
>>>>> 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
>>>>>
>>>>
>>>
>>