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From Peter Janovsky <peterjanov...@yahoo.com>
Subject Re: [users@httpd] Re: Proxy streaming
Date Mon, 06 Sep 2010 17:28:30 GMT
Varnish is a great tool. You would have to pre-cache your content to minimize first byte response
time for large objects as varnish waits for the entire response from the backend to be cached
before streaming to client. If object is in cache response times are great. I know the varnish
team was looking at implementing streaming while caching, not sure if this is complete. 



On Sep 6, 2010, at 12:28, Eric Covener <covener@gmail.com> wrote:

> On Mon, Sep 6, 2010 at 11:42 AM, Thom Brown <thom@linux.com> wrote:
>> On 6 September 2010 16:10, Eric Covener <covener@gmail.com> wrote:
>>> On Mon, Sep 6, 2010 at 10:55 AM, Thom Brown <thom@linux.com> wrote:
>>>> On 6 September 2010 12:49, Eric Covener <covener@gmail.com> wrote:
>>>>> Is the response cacheable?
>>>>> 
>>>>> http://httpd.apache.org/docs/current/caching.html
>>>> 
>>>> Just checked and it appears the header was returning no-cache in
>>>> Cache-Control.  Using CacheIgnoreNoLastMod now.  It meets all other
>>>> criteria.
>>>> 
>>>>>>> MCacheMaxStreamingBuffer 300000
>>>>> 
>>>>> Is it larger than 300KB?
>>>> 
>>>> I left it at 300KB because I didn't want a huge latency.  As it's a
>>>> stream, it'll be indefinitately long.  Have I misunderstood this
>>>> setting?
>>> 
>>> I think so, as soon as the cache has seen 300KB of the response (over
>>> multiple chunks), it will decide the response on the whole is too big
>>> to be cached.
>> 
>> By that logic, streams can't really be cached using mem_cache as it
>> will always hit the limit.  Do I need to look at something else, like
>> Varnish?
> 
> If you define a stream as an infinitely long response, then I don't
> think it can be stored in memory.
> 
> -- 
> Eric Covener
> covener@gmail.com
> 
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