I am having some difficulty with my squid implementation and have come here to the squid experts for your help.
My application is to use squid to manage a small collection (10-12) of large (around 2 GB) objects in the cache which don't change at high frequency, and deliver these objects to around 40 clients spread across 4 network interfaces. I have a dedicated dual processor Solaris machine with 2 GB of RAM and a dedicated 36 GB cache drive and running a quad 100 Mb NIC. The objective is to be able to run all 4 ports at switch speed and deliver about 11 MBytes/sec to each port. I upped cache_mem to 1500 MB to fully utilize the RAM I set store_avg_object_size 1 GB to decrease the structure overhead I then use wget to fetch a 450 MB object. This configuration can only deliver an aggregate throughput of about 20 MB/s, and supports 1 port a full speed, 2 ports at 10 MB/s and 4 ports at 5 MB/s. This is less than half of the desired throughput. I then tried setting maximum_object_size_in_memory to 512MB to get squid to retain the object in memory. This worked, as I went from TCP_HIT to MEM_HIT, but performance plummeted by about 20X, which was unexpected. I have also rebuilt with threads and async i/o and run the aufs cache type. This did improve performance some, but still not to the point of full switch speed. I know the HW is capable of delivering the necessary performance as it is possible to repeat the same test against apache directly and there is no degradation in performance from 1 to 4 ports. It delivers full switch speed to each port. Can anyone recommend a large object configuration which would work in this application? Perhaps a different memory replacement policy too? Best regards, -mikep
begin:vcard n:Puckett;Michael tel;work:(510) 315-4777 x31162 x-mozilla-html:TRUE org:Sun Microsystems Inc;Software Integration Engineering version:2.1 email;internet:[EMAIL PROTECTED] adr;quoted-printable:;;M/S NWK11-106<br>=0D=0ASun Microsystems Inc<br>=0D=0A901 San Antonio Road;Palo Alto;CA;94303-4900;USA x-mozilla-cpt:;23168 fn:<b>Michael Puckett</b> end:vcard
