Re: [gentoo-cluster] gentoo 2006.1 + openmosix-sources-2.6.12.r577 + openmosix-user?

[momentics]

hello Ramon
(cannot be agreed that grids needs to be explicitly defined, but we
can leave it as is – that's not important actually)

Your example is quite competitive… I think that it works well when
properly used.
btw I'm working at dell emea :) - glad to hear of dellserv using ;)

Let me please explain my conf.

Well, we are using 3dns/bigip for web/application/etc layers. I'm
expert here so there are no questions. The question is all about of
oracle rac that uses LVS in round robin (LVS is configured directly on
database nodes).

The actual question

Our development and app management is divided on two parts: "the
database" and "the rest".
Oracle/linadm are using LVS when they are building databases for us.
(just to clarify the question) Oracle RAC consists of several
Active/Active nodes, each of them has its own node address. There is
also dataguard but it is out of scope in this context.

So, we have, say, N nodes and N node IPs. Normally, these IPs I should
use in Oracle client TNS name on app boxes. But linux gents are
building LVS on top, where we additionally have K LVS' IPs (K=N) and
they are suggesting to use LVS' instead of Oracle's ones. That's
probably is fine.
Oracle clients on each app box is configured in LB mode. Transactions
are short lived then connection is recycled (in a test period I'm
speaking of – immediately)

So then, I'm using MRTG to see database load…. Yes! It is not
loadbalanced properly over time.
When I'm injecting F5 that points to N database nodes in roundrobin
and proposes 2 BigIP's IPs in the same OraClient configuration it is
loadbalanced properly.

The question is – I'm trying to find at least 1 idea on why we need to
use LVS here.

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