Re: [squid-users] cache peer: hit, miss and reject

On 6/09/2013 11:56 a.m., Nikolai Gorchilov wrote:
> Sorry for the late reply. Was traveling in the last two days.
>
> On Wed, Sep 4, 2013 at 10:05 AM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
>
>> I would use an external_acl_type helper to do the calculation about whether a request was to be cached and set a tag=value on the transaction. The tag type ACL can then test for this tag and do a "cache deny". Since you have all traffic
>>
>> Something like this:
>>
>> external_acl_type tagger ttl=0 %URL ... (helper returns "OK tag=first-seen" or just "OK").
>> acl firstSeen external tagger
>> acl taggedFirst tag first-seen
>> http_accesss deny firstSeen !all
>> cache deny !taggedFirst
> Yeah. Did something like this, works like a charm.
>
> Even tried to remove all ICP as it is used only for marking via
> qos_flows parent. The helper mostly replicates the logic behind our
> custom ICP listener and returning tag=parent-hit was a no brainer.
> Unfortunately I have discovered that clientside_tos doesn't support
> slow acls like tag. I believe this fact has to be mentioned somewhere
> at http://www.squid-cache.org/Doc/config/clientside_tos/. Will stick
> to ICP HIT/MISS & quos_flows for DSP marking for now, while observing
> ZPH kernel patch as an alternative.

'tag' is a fast-ACL check against the transactions existing tag. I
recoomend it a lot to prevent mistakes using external_acl_type tests in
fast ACL checks. Perhapse you have found a bug in the clientside_tos -
checking that now.

> Thanks Amos. For all the efforts keeping the squid development going
> and it's community alive :)

Welcome

Amos
Received on Fri Sep 06 2013 - 04:40:46 MDT