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From: Alan Carroll <solidwallofcode@oath.com>
Date: Thu, 23 Nov 2017 10:38:05 -0600
Message-ID: <CABLMoBfvk75uBS8K0Vd5Cwj1deOKGqdmB-0siBbhJhXw7Z8V8g@mail.gmail.com>
Subject: Re: Cache sharing between siblings
To: users@trafficserver.apache.org
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archived-at: Thu, 23 Nov 2017 16:38:19 -0000

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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 <dcarlin@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 <veiko.kukk@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 <veiko.kukk@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
>>>
>>>
>>
>

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<div dir=3D"ltr">Sorry for the delay, and thanks Dave for answering. This i=
s a feature under active development. Oath internally uses a plugin that im=
plements CARP for sharing across a pod. We are trying to open source it but=
 it&#39;s currently too flaky to support externally. We are working on impr=
oving it to the point where it can be open sourced without embarrassment. I=
n the longer run, however, there is a &quot;Layer 7 Routing&quot; project (=
also known as &quot;Next Hop&quot;) which you can track here - <a href=3D"h=
ttps://github.com/apache/trafficserver/projects/7">https://github.com/apach=
e/trafficserver/projects/7</a><br></div><div class=3D"gmail_extra"><br><div=
 class=3D"gmail_quote">On Thu, Nov 23, 2017 at 9:53 AM, David Carlin <span =
dir=3D"ltr">&lt;<a href=3D"mailto:dcarlin@oath.com" target=3D"_blank">dcarl=
in@oath.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div di=
r=3D"ltr"><div>ATS doesn&#39;t have this functionality currently.=C2=A0 I k=
now a couple companies are working on it, but nothing to contribute to open=
 source yet as far as I know.</div><span class=3D"HOEnZb"><font color=3D"#8=
88888"><div><br></div><div>David<br></div></font></span></div><div class=3D=
"HOEnZb"><div class=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">On Thu, Nov 23, 2017 at 9:15 AM, Veiko Kukk <span dir=3D"ltr">&lt=
;<a href=3D"mailto:veiko.kukk@gmail.com" target=3D"_blank">veiko.kukk@gmail=
.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"lt=
r">Hi again,<div><br></div><div>Are there any better lists/forums to ask su=
ch questions?</div><div><br></div><div>Regards,</div><div>Veiko</div><div><=
br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">20=
17-11-15 11:07 GMT+02:00 Veiko Kukk <span dir=3D"ltr">&lt;<a href=3D"mailto=
:veiko.kukk@gmail.com" target=3D"_blank">veiko.kukk@gmail.com</a>&gt;</span=
>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-l=
eft:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hi,<div><br></div><di=
v>I&#39;m new to ATS, so far we&#39;ve been using Squid, but due to it&#39;=
s instability are moving away.</div><div><br></div><div>I&#39;m interested =
in avoiding regional cache duplication in CDN system. Currently, we have se=
veral Squid servers working as siblings and only pulling from origin if non=
e of them has the object in cache, if sibling has object in cache, it&#39;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 workin=
g quite well so far.</div><div><br></div><div>Is similar setup possible wit=
h ATS?</div><div>I found no information in documentation how to configure s=
iblings (only parent configuration is documented). Could you point me to ri=
ght direction?</div><div><br></div><div>Regards,</div><div>Veiko</div><div>=
<br></div></div>
</blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>

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