Re: [squid-users] Re: squid & http-1.1

Linda W wrote:
> Amos Jeffries wrote:
>> NP: Squid cannot make network fetches go faster than the line speed. All
>> it can do is cache things locally for a repeat request to be faster. For
>> the best caching controls it's a toss up between 2.7 and 3.1 as of this
>> writing.
> ----
> Doesn't HTTP 1.1 specify that content can use compressed content?

Yes, 1.1 allows chunks, but Squid decodes chunks on the fly before
passing them on. There are also limits on how large the files can be
before de-chunking fails.

> Where does pipelining come in? 1.0 or 1.1?

Not sure, Squid does up to 2 requests pipelined, regardless of the
version. More than that and they get delayed reading off the wire until
the first one in has completed.

> Not that's generally
> useful, but
> doesn't 1.1 also allow partial or range downloads?

Yes, but Squid cannot cache such requests. If it can cache a full
request it can server them out of cache. That only requires the client
browser/app be 1.1.

> Compression would
> be good on
> the non-media portions for speeding up downloads, no?

transfer-level chunking yes, can improve things arriving at Squid. But
gets decoded for storage and no gain outward.

gzip compression on the web server before sending is a 1.0 feature and
most web servers are capable of doing it anyway.

>
> I have a large-ish disk, but only ~6G set aside for squid. I
> suppose that'd
> be a benefit if all my content were out of the cache, but it is good
> when I need to retrieve a few hundred meg image of something out of
> cache. I guess it depends on
> what you mean by 'large'...
>
> I just asked because MS-OFFICE tried to 'activate' by using 1.1 due
> to incorrect
> settings in IE -- Setting IE to force 1.0 let it work. Nothing to do
> with cache
> size, but it reminded me to ask about 1.1 -- it's a default setting in
> IE8 (Hadn't
> installed FF yet! :-)).
>
> -l

Something weird going on with office or the activation server and their
use of 1.1 then. HTTP/1.1 is explicitly designed to not break when going
through a non-1.1 middleware proxy.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE7 or 3.0.STABLE20
   Current Beta Squid 3.1.0.15