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Re: is it bad to constantly reload squid.conf

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Amos Jeffries wrote:
> Jeff Peng wrote:
>> You will 'squid -k reconfig' for reloading the new config file.
>> This is safe enough form what I checked in the sources years ago.
>> But if you reconfig it too frequently, I don't know the result.
>>
>> Regards.
> 
> Squid will not accept new requests for the period it takes to reload the
> config, restart the helpers, and write the cache index to disk and read
> it back in again.
> 
> Amos
> 
>> ---------- Original Message ----------
>> From: squid <squid@xxxxxxxxxxxxxxxxxxxxxxxxx>
>> To: Squid Users <squid-users@xxxxxxxxxxxxxxx>
>> Subject:  is it bad to constantly reload squid.conf
>> Date: Wed, 25 Nov 2009 11:17:25 +0000
>>
>> Hello,
>>
>> My question is, would it be 'bad' to reload squid.conf, up to 100 times 
>> within a very short space of time? If so, is there a 'better' way of 
>> getting Squid to acknowledge changes made to an ACL?
>>
>> I work in a school and have created an ACL which reads in pupils network 
>> ids from an external text file this then allows them to access the web. 
>> The contents of this file are dynamic and pupils ids are added via a php 
>> script after they agree to abide by the schools internet policy.
>>
>> Currently, every time a new user is added to the list the squid 
>> configuration file is reloaded. It is possible that this may happen many 
>> times (up to 100) within a few seconds.
>>
>> I'm a bit of a newbie to all of this so apologies if i'm going over old 
>> ground..
>>
>> Many Thanks
>>
>>
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> 
> 

Thank you both for your replies.

The worst case was that reloading the config this way would cause squid
to fail. From what I understand about the reply from Amos, the way squid
would behave when handling these multiple reloads may create a situation
where a user has been added onto the ACL but Squid has failed to reload
properly, causing the user to be denied access to the web. In that
instance - is there a better way to make Squid aware of changes to an
ACL as they happen or is reloading the only way?

Regards

Rob


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