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Subject: Re: ATS not caching anything?
From: Leif Hedstrom <zwoop@apache.org>
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Date: Mon, 20 Oct 2014 17:39:49 -0700
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To: users@trafficserver.apache.org


> On Oct 20, 2014, at 5:25 PM, J David <j.david.lists@gmail.com> wrote:
>=20
> On Mon, Oct 20, 2014 at 8:07 PM, James Peach <jpeach@apache.org> =
wrote:
>> You probably need to set proxy.config.http.cache.required_headers ...
>=20
> Got it in one!  Thanks!
>=20
> It would be swell if that were mentioned from
> =
https://docs.trafficserver.apache.org/en/latest/admin/http-proxy-caching.e=
n.html
> as the default behaviors described there are very different:
>=20
> "By default, Traffic Server caches all objects (including objects with
> no headers); you should change the default setting only for
> specialized proxy situations. =E2=80=9C


Thanks, yeah that should be changed. If you are up for it, you should =
make the changes and send us a pull request via Github :-).

>=20
>> Pretty sure you can't disable the disk cache. Objects only get pulled =
into RAM after coming through the disk cache
>=20
> Hmm, what can we do to avoid the disk turning into a bottleneck?
> Should we configure a memory filesystem?


Yes, that=E2=80=99s typically what people would do, setup a disk cache =
on e.g. /dev/shm. If you do, you probably (but always) want to turn off =
the RAM cache in ATS. You can also use some of the tricks Comcast did =
with the hosting.config, to put some content unto the RAM disks, and =
other content unto e.g. a rotational disk.

=E2=80=94 Leif