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On Wed, Feb 04, 2004 at 01:07:11PM -0500, John Reuning wrote:
> What's the best method of easing a new server into an LVS cluster? For
> example, I have a cluster of web servers. Each server has several
> hundred active connections, and the new server starts at zero. lc load
> balancing pounds the new server to death within about an hour, but rr
> never gives the new server enough requests to bring it to the level of
> the others.
>
> Is there a hybrid lc/rr balancing algorithm? Here are a couple of
> specific properties:
>
> - Operate with lc balancing, but only give a single real server a
> certain number of new connections at a time. After that threshold is
> reached, rotate through the other real servers once or twice, then give
> the RS with a low count a few more connections, etc.
>
> - Operate on rr load balancing while the real servers' active connection
> counts are within a certain range (10, 20, etc.). Add a few checks to
> keep it from flipping back and forth between lc & rr.
>
> Or is the only workaround to set up dynamically adjusted weighting? If
> so, suggestions would be welcome. I'm currently using keepalived.
That is probably a good option. Perhaps a better option would
be to implement some sort of slow-start scheduler for LVS.
It seems that it would be pretty straight forward.
--
Horms
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