[SQU] Another question about delay pools

Hi,

I have a question about delay pools (again). I thought I understand
how it works, but when I tested it, I lost a lot in performance.
Currently I'm using a custom queuing on a router for bandwidth
management, but I'm running 3 squid processes on a box. Right now
I'm building a new proxy squid2.3.STABLE4 and planned to run just
one squid process and use delay pools. Before I attach my config,
just to explain what I wanted to achieve. We have 2M link and I wanted
to give better access to staff and teaching-labs then general purpose labs.
Teaching-labs are defined as a separate group to be able to change bandwidth
depending of usage.

What did I do wrong?

ACLs:

acl staff src 10.10.0.0/255.255.0.0
acl students src 10.20.0.0/255.255.0.0
acl teaching-labs src 10.20.8.0/255.255.255.0 10.20.9.0/255.255.255.0

Delay Pools Definition:

delay_pools 3
delay_initial_bucket_level 50

####################################################
# Staff subnets 10.10.0.0
# 8 subnets, 300PCs, 100PCs concurrent
# agregate restore 720Kbits/s, burst to 1Mbits/s
# network restore 90kbits/s, burst to 256Kbits/s
# user restore 8Kbits/s, burst to 64Kbits/s
####################################################
delay_class 1 3
delay_access 1 allow staff
delay_access 1 deny all
delay_parameters 1 92160/131072 11520/32768 1024/8192

####################################################
# Teaching-labs subnets 10.20.8.0 and 10.20.9.0
# 2 subnets, 130PCs, 75PCs concurrent
# agregate restore 600Kbits/s, no burst
# network restore 300kbits/s, burst to 512Kbits/s
# user restore 8Kbits/s, burst to 64Kbits/s
####################################################
delay_class 2 3
delay_access 2 allow teaching-labs
delay_access 2 deny all
delay_parameters 2 76800/76800 38400/65536 1024/8192

####################################################
# Student subnets 10.20.0.0
# 9 subnets, 300PCs, 150PCs concurrent
# agregate restore 600Kbits/s, no burst
# network restore 70kbits/s, burst to 256Kbits/s
# user restore 4Kbits/s, burst to 64Kbits/s
####################################################
delay_class 3 3
delay_access 3 allow students !teaching-labs
delay_access 3 deny all
delay_parameters 3 76800/76800 8960/32768 500/8192

Also I would like to change this bandwidth management after hours, i.e. to
give equal access to all. Anyone know how this can be achieved?

Many thanks for help.

Regards,

Tanja

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