RE: [squid-users] Cache_dir size considerations

Well i want to make sure that my settings are optimized and want to learn more about the cache_dir settings.....let me come in details
 
 
I have installed squid3stable24 on Ubuntu 8.04 on IBM 3650 X series server with two hard disks on which physical RAID1 is implemented. I am to use the Squid Server for 1000 users out of which 250 are power usrs rest of them are normal users for which there are many restrictions(youtube,facebook,msnmessgenger,yahoomessenger,mp3mpg etc...).
 
I have done my settings specifically to ensure that windows updates are cached and my maximum_object_size is 256 mb. Also i am looking forward to cache Youtube content(for which i have no updated script and settings so far the one on internet is with storeurl directive which is depricated).......
 
 
Now my cache directory size is 50 gb with 16 L1 and 256 L2. I think better would be
 
Cache_dir_size aufs 50 GB 48(L1) 768(L2)
 
 
as far as L1 & L2 settings i am clear that there should be no more than around 100 file in L2 directories so one's settings should be adjusted accordingly. However i am confused that if setting your cache (50gb) of too large a size will have anything to do with your performance. Secondly at the moment the cache directory is implemented on the same hard drive on which OS is installed. I know that cache should be better moved to a spare hard drive. But what about the highavailability? Failure of a disk cud result in the failure of proxy?
 
Another confusion which i have is that what about the cahe_effective_user i hav set my user
 
cache_effective_user proxy but i dont have much concepts about it. I have read on SAN institute site a white paper published 2003 that squid should not be run as nobody user but as a sandbox user with noshell. However i am not sure what is it all about and whether this informaiton is still valid after 7 years have been passed.
 
Please also guide me that what are the risks involved with this setting which i have done for windows update:
 
range_offset_limit -1
maximum_object_size 256 MB
quick_abort_min -1
 
 
Further after giving squid too many longs list of blocked site say containg 100+ sites. I have noticed that its slowed down however i am not sure that if it is the reason? please guide......
 
 
Please guide in detail it will be really beneficial for me as concept building...i would be really thankful..
 
regards,
 
 
 
 

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> Date: Wed, 17 Mar 2010 11:00:22 +0100
> From: mromani_at_ottotecnica.com
> CC: squid-users_at_squid-cache.org
> Subject: Re: [squid-users] Cache_dir size considerations
>
> GIGO . ha scritto:
>> The total amount of Ram on the server is 4 GB with cache_mem parameter set to 1 GB.
>>
>
> IMHO there's plenty of HW for squid to run smoothly. But it also depends
> on the amount of traffic.
>
> I'm sorry but I think I don't get your point... what is exactly the
> problem you're having ?
>
> --
> Marcello Romani
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Received on Wed Mar 17 2010 - 15:43:34 MDT