Re: [squid-users] PARENT_HIT coming as MISS :(

On 31/12/10 04:18, Hasanen AL-Bana wrote:
> Hello everybody,
> My setup is : Client ------> [Squid Cache Server (A)] -------> Internet
> |
> |------------------->
> [Cache Peer as parent (B)] ------> Internet
> The first squid server forwards only Youtube flv requests to its
> parent , the Squid peer server is configured to cache big flv files
> from youtube.
> The youtube cache is working perfectly ,however , ICP replied are
> coming as miss while the requested file is really a HIT !!
> here is what I get on my (B) Server :
> 0 10.0.0.51 UDP_MISS/000 403 ICP_QUERY
> http://v15.lscache4.c.youtube.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Calgorithm%2Cburst%2Cfactor%2Coc%3AU0dYSFdPVF9FSkNNOF9PSVhF&fexp=903812&algorithm=throttle-factor&itag=34&ipbits=0&burst=40&sver=3&expire=1293746400&key=yt1&signature=20098C51B763EDBF1C17FE983EB384AF3EE6AD9F.1685B0C8D59DF91F018E51485507949EE18A25D0&factor=1.25&id=697072249842d2a4&
> - NONE/- -
> 10.0.0.51 TCP_HIT/200 3023704 GET
> http://v15.lscache4.c.youtube.com/videoplayback? - NONE/- video/x-flv
>
>
> And here is what I get on my (A) server :
> 1293721262.107 11725 127.0.0.1 TCP_MISS/200 3023828 GET
> http://v15.lscache4.c.youtube.com/videoplayback?
> -FIRST_PARENT_MISS/youtube video/x-flv
>
>
> The weird thing on the (B) server is that ICP_QUERIES are reported
> MISS ,hence my (A) server take it as a MISS too despite the fact it
> is a realy TCP_HIT on the parent.
> Here is what I have on my (A) server :
> acl x-flv rep_mime_type -i video/x-flv
> acl x-flv rep_mime_type -i x-flv
> acl x-flv-req urlpath_regex videoplayback
>
> icp_query_timeout 10000
> cache_peer 10.0.0.10 parent 3128 3130 name=youtube weight=10 proxy-only
> cache_peer_access youtube allow x-flv
> cache_peer_access youtube allow x-flv-req
> cache_peer_access youtube deny all
> Is this a bug or something ?

"something". YouTube URLs differ on every request. In order to get the
HIT I assume you are using the storeurl_rewrite feature. This is
completely internal to the parent proxy producing the HIT. The URLs seen
by every other proxy are still non-identical.

FWIW storeurl does not apply to ICP requests, so they will report MISS.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.10
   Beta testers wanted for 3.2.0.4