bandwidth control

sniffer_raghav · 05-23-2008, 07:59 AM

sir,
i am using squid as a proxy server in our college .
to control bandwidth i m using delay pool in it .it is working but problem is that initailly download limit is good but suddenly it goes down and becomes slow.i m unable to diagonasis the problem .
please help me out ....

thanking you in advance ...............

sunethj · 05-23-2008, 08:03 AM

can you please elaborate

Quote:

"initailly download limit is good but suddenly it goes down and becomes slow"

.

which type of delay pools you are using? if you are using class 1 delay pool then even you have limited bandwidth per user large number of users can easily slow down a link. in that case try using the delay pool class 2 and see.

sniffer_raghav · 06-23-2008, 04:52 PM

Quote:

Originally Posted by sunethj

can you please elaborate .

which type of delay pools you are using? if you are using class 1 delay pool then even you have limited bandwidth per user large number of users can easily slow down a link. in that case try using the delay pool class 2 and see.

as you suggested i tried delay pool 2 and delay pool 3.
but the problem is not yet solved i m not able to utilise the bandwith properly even if number of users are very less.
please help me out ......

sugges me any method how to solve dis problem.

sunethj · 06-23-2008, 10:40 PM

can you please post the link speed, number of users you have and the bandwidth allocations for each user

sniffer_raghav · 06-24-2008, 05:05 AM

Quote:

Originally Posted by sunethj

can you please post the link speed, number of users you have and the bandwidth allocations for each user

thank you 4 your reply.......

in our college we are having around 3000 users and we have a link of 8Mbps and we are allocating 64Kbps to each user .

sunethj · 06-24-2008, 06:20 AM

from the given numbers i think around 100-120 concurrent users can use the total bandwidth (even with the bandwidth restrictions) and i have never handled a network of this scale. hope some on with similar experience will help us.

rossonieri#1 · 06-25-2008, 01:21 PM

hi raghav,

Quote:

in our college we are having around 3000 users and we have a link of 8Mbps and we are allocating 64Kbps to each user .

nope - i dont think that doesnt have too much co-relation with the delay class (although it is up to you to configure it).

i think that 64kbps was way over too high.
with the assumption 1:1 compression (that is all of your client accessing your proxy) the maximum limit is only about 2.6Kbps - just dont rely too much on what your proxy has been cached - or you can try to start using parent proxy.

try with 1:3 compression - so that would be 2.6K*3 = 8Kbps perclient.

i usually set a minimum amount 1:6 compression of total BW (normal).

HTH.

sniffer_raghav · 06-26-2008, 01:55 PM

Quote:

Originally Posted by rossonieri#1

hi raghav,

nope - i dont think that doesnt have too much co-relation with the delay class (although it is up to you to configure it).

i think that 64kbps was way over too high.
with the assumption 1:1 compression (that is all of your client accessing your proxy) the maximum limit is only about 2.6Kbps - just dont rely too much on what your proxy has been cached - or you can try to start using parent proxy.

try with 1:3 compression - so that would be 2.6K*3 = 8Kbps perclient.

i usually set a minimum amount 1:6 compression of total BW (normal).

HTH.

actually the problem with using delay pool is that users are unable to use complete bandwidth allocated to them .even if the number of users are very low . as you mentioned i have configured it for 1:3 after seeing that problem but now also i am not able to solve it .
i have tried all the delay class 1 2 3 .
is it the case if we use delay pool we cannot use complete width if not then what is d problem please reply.
thanking you in advance........

rossonieri#1 · 06-27-2008, 12:58 AM

hi raghav,

OK - pls post your delay pool + class config - let us see how you work with it.