How to manage Squid based on per user user bandwidth - bandwidth

Question

I want to manage the bandwidth and traffic based on user activities on Squid Server Proxy.
I made some research but couldn't find the solution that I want.
For example, users who have more than 256K traffic should be restricted from server.
Can you help me?
Thanks

Answer 1

I'm assumed squid 3.x:
To provide a way to limit the bandwidth of certain requests based on any list of criteria.
class:
the class of a delay pool determines how the delay is applied, ie, whether the different client IPs are treated separately or as a group (or both)
class 1:
a class 1 delay pool contains a single unified bucket which is used for all requests from hosts subject to the pool
class 2:
a class 2 delay pool contains one unified bucket and 255 buckets, one for each host on an 8-bit network (IPv4 class C)
class 3:
contains 255 buckets for the subnets in a 16-bit network, and individual buckets for every host on these networks (IPv4 class B )
class 4:
as class 3 but in addition have per authenticated user buckets, one per user.
class 5:
custom class based on tag values returned by external_acl_type helpers in http_access. One bucket per used tag value.
Delay pools allows you to limit traffic for clients or client groups, with various features:
Can specify peer hosts which aren't affected by delay pools, ie,
local peering or other 'free' traffic (with the no-delay peer
option).
delay behavior is selected by ACLs (low and high priority traffic,
staff vs students or student vs authenticated student or so on).
each group of users has a number of buckets, a bucket has an amount
coming into it in a second and a maximum amount it can grow to; when
it reaches zero, objects reads are deferred until one of the object's
clients has some traffic allowance.
any number of pools can be configured with a given class and any set
of limits within the pools can be disabled, for example you might
only want to use the aggregate and per-host bucket groups of class 3,
not the per-network one.
In your case can you use:
For a class 4 delay pool:
delay_pools pool 4
delay_parameters pool aggregate network individual user
The last delay_pool, can be configure in your squid server proxy:
for example; each user will be limited to 128Kbits/sec no matter how many workstations they are logged into:
delay_pools 1
delay_class 1 2
delay_access 1 allow all
delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
Please read more:
http://wiki.squid-cache.org/Features/DelayPools
http://www.squid-cache.org/Doc/config/delay_parameters/