[squid-users] Squid4 has extremely low hit ratio due to lacks of ignore-no-cache

[Yuri Voinov]

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I confirm: 3.5.10 has normal cache-hits rate. Against 4.0.1. For the
same sites.

Something broken in 4.x.

27.10.15 1:37, Amos Jeffries пишет:
> On 27/10/2015 6:22 a.m., Yuri Voinov wrote:
>>
>> Ah, ok:
>>
>> We see in redbot.org this info in server response:
>>
>>  Cache-Control: no-cache
>>
>
> It also says "this content was negotiated but does not have an
> appropriate Vary header". Which is marked as a protocol error.
>
> And has a status code of 400 (unspecified error by the client).
>
> And has passed through three non-Squid proxies without being cached
> there either.
>
>
>>
>>
>> So, what? 3.5.10 permit ignore this. 4.0.x - deny.
>>
>
> Rather bold statement. Where is the cache.log line(s) saying that was
> the decision Squid made?
>
>
>> Squid decides?
>>
>
> No, the content owner does.
>
>
>> Maybe I'll decide what and how to cache in the my setup?
>
> You are just the caretaker of the information. It belongs to its
> creators. What you can do with their property depends on what they allow
> to be done with it.
>
> HTTP is the legal rights granting methodology they chose to distribute
> with. The creators have granted you/anyone the license to cache
> (redistribute) that object. They did so via the badly named
> Cache-Control:no-cache header. Which comes with the license condition
> that the content be revalidated before redistribution.
>
> In other words, the content owner(s) retain the right to veto any
> recipient receiving their content or to provide alternative content at
> any time.
>
> [[ Given that it seems to flip between an error page and an image
> depicting the internal design of a nuclear device - depending on where
> in the world one views it from. It would seem that the behaviour is
> probably intentional. ]]
>
>
> Within your new right to cache and redistribute you then get to choose
> how long for - on that particular item.
>
>
> BTW: Revalidate does not lead to MISS. It leads to a REFRESH_MODIFIED or
> REFRESH_UNMODIFIED.
>
>
> Amos
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> squid-users at lists.squid-cache.org
> http://lists.squid-cache.org/listinfo/squid-users

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