Re: [squid-users] Squid downloading same files many times?

From: Chris Robertson <crobertson_at_gci.net>
Date: Fri, 21 Nov 2008 13:51:55 -0900

Elvar wrote:
>
>
> Elvar wrote:
>>
>> Hello,
>>
>> Recently I discovered that one of my clients' bonded T1 links to the
>> internet was getting maxed out for up to an hour at a time. After
>> doing some research and using Sawmill to generate some usage
>> statistics on the user surfing activity, I found that some users were
>> downloading 1.5 gigs worth of Adobe Reader and other various
>> downloads. Adobe Reader is obviously not that large and I know the
>> user would just keep downloading it over and over on purpose. I'm
>> wondering if somehow Squid is repeatedly downloading these files and
>> if so, why? I've had squid running at this place for a long time and
>> I've never seen anything like this. It's a real problem though
>> because when it happens, the bandwidth is just leveled.
>>
>>
>> The exact URL which was being accessed the most recent time is
>> http://ardownload.adobe.com/pub/adobe/re ‚Äč
>> ader/win/8.x/8.1.3/enu/AdbeRdr813_en_US.msi <javascript:;> .
>>
>> Is anyone else experiencing something like this lately?
>>
>>
>> Thanks,
>> Elvar
>>
>>
>
> Sorry about that, I accidentally forgot to send in plain text. The URL
> again is
>
> http://ardownload.adobe.com/pub/adobe/reader/win/8.x/8.1.3/enu/AdbeRdr813_en_US.msi
>
>
>
> Could it be that the update is failing and continuously retrying?

Have the following been adjusted from their stock settings:

quick_abort_min
quick_abort_max
range_offset_limit
maximum_object_size

It sounds like the client is requesting the file in sections, but Squid
is grabbing the whole thing. Since it is a 34MB download, it might be
larger than your maximum_object_size (defaults to 4MB), and as such is
not being cached.

> Elvar

Chris
Received on Fri Nov 21 2008 - 22:52:01 MST

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