Re: [squid-users] How many proxies to run?

Le 13 janvier 2012 07:29, Eliezer Croitoru
<eliezer_at_ec.hadorhabaac.com> a écrit :
> On 12/01/2012 19:58, Gerson Barreiros wrote:
>>
>> I have an unique server doing this job. My scenario is most the same
>> as mentioned above.
>>
>> I just want to know if i can make this server a Virtual Machine, that
>> will use shared hard disk / memory / cpu with another VMs.
>
> web proxy on a vm is not the best choice in a mass load environment.
> you can use on a vm but in most cases it will mean lower performances.
>
> i have a place with 40Mbps atm line that is using 2 squid servers on a vm
> and it works fine.
> another one is an ISP with 4 machines with a total of 800Mbps output to the
> clients.
>
> statistics is one of the musts before getting a conclusion.
>
> Eliezer
>

This subject is tricky, as many of here has told. Number of user is
not a relevant data. You shall state exactly what is "slow Internet"
and when that happens to define clearly your problem. How ever, I pas
you some tips here:

- About machine, more RAM more quicker
- Replace default LRU cache policy for mem cache use heap GDSF, and
for disk heap LFUDA
- If you are using a slow disk (using /dev/hdX instead of /dev/sdX as
a rule of dump) please try to void disk cache
- place cache_dir tree directory structure (L1 and L2) wider to void
FS problmes (ext2 has issues with too many files in a directory)
- place a local DNS,
- place DNS TTL cache bigger than default. 15 mins is a rsonable value
- if using authentication us bigger cache ttl times to void slow negotiation
- at ACL configuration, remember there is short-circuit logic so when
adding http_access clausles, place in first them acl what higher
likehood to fail, this will speed up

Dont hesitate on contact me offline

LD
Received on Fri Jan 27 2012 - 05:22:58 MST