Re: [squid-users] Http Req/sec Once more

Hello Joe
Gosh . u still remember me .. guess ppl dont kinda tend to forget pests so very
soon ;-)

i Have a compaq proliant 5500 series
dual P11 Xeon 550 Mhz
512 megs Ram
5 SCSI Ultra -2 10000 rpm disks of 9 GB each .. the cache dirs are spread over
4 disks as 3GB slices for a total cache size of 12 GB .. each on a seperate
reiserfs partition
compaq Netelligent 10/100 mbps nics
this is redhat 6.2 with 2.2.19 kernel compiled with ip_wccp as a module..
picked up the patch from ur site
FD_SETSIZE is 16384
my start up scripts
echo 1 >/proc/sys/net/ipv4/ip_forward
echo 16384>/proc/sys/fs/file-max
echo 32768 >/proc/sys/fs/inode-max
echo 8192 >/proc/sys/net/ipv4/tcp_max_syn_backlog
echo 1024 65000 >/proc/sys/net/ipv4/ip_local_port_range
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
echo 300 > /proc/sys/net/ipv4/tcp_keepalive_time
echo 0 > /proc/sys/net/ipv4/tcp_sack
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
echo 5>/proc/sys/net/ipv4/tcp_syn_retries
echo 10 >/proc/sys/net/ipv4/route/gc_interval
echo 2>/proc/sys/net/ipv4/route/gc_min_interval # used these for avoiding the
dst cache overflow msgs that i used to get
echo 30 >/proc/sys/net/ipv4/route/gc_timeout

echo "60 1000 128 256 500 3000 500 1884 2" >/proc/sys/vm/bdflush
echo "256 512 1024" >/proc/sys/vm/freepages

Yes i have read all the docs on your website

Do i need to furnish some more info
awaiting responses ..

TIA
Khiz

--- Joe Cooper <joe@swelltech.com> wrote:
> khiz code wrote:
>
> > Hi all and joe especially
> >
> > joe, i remember u giving me approximate statistics abt the capacity in
> terms of
> > req/sec for a T1 line
> > in myscenario i am connected to my upstream via a E1 (2.048 Mbps)
> > my clients connect to me via leasedlines
> > i have oversold my E1 capacity ( like all good ISPs ;-) abt 2 times to
> abt 5
> > Mb/s
> > so will the statistics change in terms of req/sec that the cache will
> receive
> > sorry for being so dumb. once more ...
> > one more thing
> > commercial boxes like cisco, netcache etc give statisctics in terms of
> > connections/sec that the box can handle
> >
> > my linux box has time-wait period of 60s
> > tcp_max_syn_backlog = 8192
> > local_port_range 1025 64000
> >
> > how can i calculate the number of simultaneous connections that this squid
> box
> > can sustain for web traffic ..assuming that only squid runs on the box
>
> Hehehe... How long is a piece of string, Khiz?
>
> You haven't told us anything about your box. Here is what I sell for
> one or two T1 links these days:
>
> 800MHz Celeron (can't get a 633 anymore, which also would be plenty of
> power)
> 256MB RAM
> 1 x 7200 RPM 30GB disk
>
> These boxes will sustain about 60-70 reqs/sec of real traffic without
> sweating. Short (30 minute) bursts of loads of over 100 reqs/sec are
> probably possible.
>
> However, a client population suitable for a single T1 will never
> generate that high of a sustained load. Our single T1 ISP clients are
> seeing about 35 reqs/sec or less at their peak periods and their caches
> aren't working very hard even when doing extra stuff like running
> redirectors or acting as ICP peers (even our old 850 boxes which were
> only 450MHz K6-2 with 192MB RAM). You can't make your users browse only
> cache hits, so the speed of your cache isn't really your upper bound if
> you have a T1.
>
> Have you read my caching deployment guide at the Swell Technology site?
> It has some information about all of this stuff. I've also specified
> all of our machines based on reqs/sec and bandwidth they will
> handle--that ought to give you some rough ideas about what Squid can do
> on given hardware if well tuned. (Some of this information is going
> away soon, or being altered significantly, when our new website goes up
> March 1st or thereabouts. So more up to date information and a lot more
> of it will be on the site, but probably less specific for the kind of
> info you are looking for--so enjoy it while it is available.)
> --
> Joe Cooper <joe@swelltech.com>
> http://www.swelltech.com
> Web Caching Appliances and Support
>

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Received on Wed Feb 06 2002 - 21:36:38 MST