https://stackoverflow.com/questions/22504422
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RussianI'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
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