Anybody interested in testing patch to allow weighted nodes?
dormando at rydia.net
Thu May 17 08:31:23 UTC 2007
> So my question to this mailing list is... does the perlbal community
> see any value in having a weighting mechanism? If the answer is no, I
> would love to hear how you are achieving the same effect and why your
> solution is your preferred mechanism.
> Thanks in advance for any constructive feedback,
Twiddling values on the arrowpoint/bigip/netscaler/alteon/whatever is
something I don't miss. It's embarassing how bad an expensive netscaler
does its job compared to perlbal.
I used to wish perlbal would allow me to specify the max connections per
node in the nodefile. Firstly to make it easier to twiddle the settings
without having to push config updates to dozens of servers. Secondly so
perlbal knows not to make an extra connect attempt if you're at the
But uh. We now have scripts that detect how fast a machine is, reduces
the number if it's running other services (mogstored, memcached), and
handles that magically now.
Are you having an issue with connecting more often than necessary? With
almost 200 backend servers with 4-12 apache processes each, we're only
initiating new connections a couple times per second. Once you're
connected up the load just "flows" :) I've only ever had issues with
perlbal's backend connection mechanisms when something's breaking keepalive.
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