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Hello Joe and all,
This particular question comes at an interesting time
for me. We are about to use LVS NAT routing to support
upwards of:
IMAP (3000-5000 conncurrent connections; upwards of
400K messages - 2k-35k each - per 24 hr period)
+
SMTP ("ipvsadm -Ln [--rate|stats]" showns single-digit
Active, and single to double-digit Inactive
connections, with CPS coming in at 0-2 max, and in 2
days running total In/OutBytes just over 1GB
combined.)
+
HTTP/HTTPS ( 0-2 CPS, In/OutBytes 1GB in 2 days)
+
POP (very tiny amount - maybe 100 users)
And my questions are:
(1) Will LVS NAT routing handle this
(2) Do I need PERSISTANCE on IMAP and POP (I already
use persistance on HTTP/HTTPS), and if so, what
setting? I currently have PERSISTANCE set to 15
MINUTES for HTTP/HTTPS/IMAP/POP. What persistence do
you recommend for imap/pop/http/https ?
Your speedy and accurate feedback would help
tremendously.
Thanks
Peter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--- Peter Mueller <pmueller@xxxxxxxxxxxx> wrote:
> Hi Malcolm,
>
> > I have a client who insists on using HTTP with
> persistence of 20 mins,
> > because of lazy developers using IIS sessions :-(
>
>
http://marc.theaimsgroup.com/?l=linux-virtual-server&m=103407779310426&w=2
>
> > What is the formula for working out the maximum
> number of concurrent
> > sessions for :
> >
> > 256 MB RAM and persistence = 20 mins ?
>
>
http://marc.theaimsgroup.com/?l=linux-virtual-server&m=103236403425545&w=2
>
> So 128 bytes/connection. How big is your
> connection/second? Do you have
> spikey traffic? Just put a gig or two of RAM in the
> director(s) and you
> probably won't have to worry :)
>
> > Also should I be worried about AOL mega proxy ?
>
> Are you going to have a lot of AOL users?
>
> > Should I set the granularity to 255.255.255.0 ?
>
> Read those two threads and the HOWTO, for example
>
http://www.linuxvirtualserver.org/docs/persistence.html
> and
>
http://www.linuxvirtualserver.org/Joseph.Mack/HOWTO/LVS-HOWTO.persistent_con
> nection.html.
>
> > Or is the trade off not worth it ?
>
> If you are worried about mega-proxies I would be
> vewy vewy cautios with that
> granularity setting.
>
> > Oh and while I'm here I noticed in the change log
> something about
> > "Server Slow Start" how does this work ?
>
> I'm sure that I don't know. I'd say ask Ratz but he
> is probably busy with
> girls ;-). Julian or Joseph, what the heck is this?
>
> I'm going to take a stupid guess <TM> and think that
> maybe in a weighted
> connection scheduler we slowly add weight to the
> real server until it is
> up-to-par with the rest of them?
>
> > Thanks for any help.
>
> Hope it's useful.
>
> Peter
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