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Hello,
We have successfully gotten an LVS farm working
using DR. Because we are using NT and it is not easily TUN'd, we decided to go
this route. NT servers with a Linux box running LVS and DR'ing
them.
Is it possible to load balance two of these
clusters with a TUN balancer(as long as the "local" lvs balancers are set up for
it on the external interface)?
The reason we need to do this is because we are
saturating 100Mbps with < 7 servers. The application and databases are
capable of 3200 transactions per second or 354 Mbps in the current
configuration. I want to be able to scale it using TUN since it the bandwidth
limitations disappear with TUN balancing.
This would also allow us to scale as fast as
revenue permits by adding 100Mbps connection|cluster combinations, then
adding the new cluster to the TUN farm. Our app has very short sessions
(245-800ms up to 2 seconds when saturated) which are done and gone within this
time period. It is also very bandwidth hungry. We are redirecting banners back
at the users.
Is it possible to have an LVS hierarchy (DR or
NAT clusters balanced by TUN) such as this for geographic(or local for
that matter) redundancy, and to escape the bandwidth limitations inherent with
the DR approach? Session state is not an issue, domain/cookie relationships
are.
thx,
Neil
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