[squid-users] Large scale Transparent proxy setup

Dear all

we are using squid as Transparent proxy with following
setup

1) Router Cisco 7200 series VXR
IOS 12.3 with WCCP v1 enabled.

2) Red Hat Linux 9 with wccpv1 patch ( 4 boxes. 2 on
each downlink )
  
Machine Hardware
Intel Entry level Server motherboard
Intel(R) Pentium(R) III CPU 1200MHz
RAM 1 GB
3 SCSI disk on each system ( one for OS and 2 for
cache)

average 3000-3800 reqs/min at peak hours.
HIT ratio is very low between 35-40 %
squid cpu usage 70-85 %

which is i think very low ?

i have applied low lentency kernel patch on one of box
and tested with Dbench ( got the following results

before appling patch
Throughput 87.6516 MB/sec 30 procs
Throughput 101.827 MB/sec 30 procs
Throughput 107.914 MB/sec 30 procs
Throughput 119.217 MB/sec 30 procs
Throughput 124.776 MB/sec 30 procs

After appling patch

Throughput 154.831 MB/sec 30 procs
Throughput 151.445 MB/sec 30 procs
Throughput 156.55 MB/sec 30 procs
Throughput 149.864 MB/sec 30 procs
Throughput 147.731 MB/sec 30 procs

you can see the difference.

and now running squid on same box i got around
50-52 % hit ratio

i am thinking running squid on port 80 .so i can skip
the iptables . any drawback running squid on port 80
???

next i am thinking how to improve squid network I/O

any improvment throughts and ideas are highly
appreciated

squid.conf is attachted below.

Thanks and Regards

UW

my squid.conf is as follows;

cache_mem 32 MB
cache_swap_low 90
cache_swap_high 95
maximum_object_size 4096 KB
cache_replacement_policy lru
cache_dir aufs /cache 8192 16 256
cache_dir aufs /cache2 8192 16 256
cache_access_log /var/log/squid/access.log
cache_log /var/log/squid/cache.log
cache_store_log none

__________________________________
Do you Yahoo!?
New Yahoo! Photos - easier uploading and sharing.
http://photos.yahoo.com/
Received on Sun Dec 07 2003 - 13:55:04 MST