[THIN] Re: Load Balancing across Zones
- From: "cherie.watts" <cherie.watts@xxxxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Tue, 27 Jul 2004 09:19:43 +1000
Hi Brian
I am running PS XP.
I have not previously published applications across zones due to poor WAN links.
The WAN links between our 2 datacentres is now gibabit and we are looking at
Publishing apps across the two datacentres for high availability.
I know that within a zone the DC maintains a list of the loads for all servers
in the zone. Specifically they update the Load Bias when new connections are
established. I also understand that the ZDC talk to each other and share the
load values as well.
But does a ZDC update the load bias for a server that is not in it's zone? Is a
user more likely to be directed to a server within the zone, of the ZDC the
client talks to?
Am I likely to get 10 users on server A in Zone 1 and 20 users on Servers B and
C in Zone 2?
I think during low activity periods this would not be an issue, but what about
the morning rush?
Thanks for sharing the Intel.
Cheers
Cherie Watts
----- Original Message -----
From: "Lilley, Brian" <brian.lilley@xxxxxxxx>
Date: Monday, July 26, 2004 7:06 pm
Subject: [THIN] Re: Load Balancing across Zones
> Hi Cherie, which version of PS are you referring to?
>
> In PS XP, you have no choice but to load balance across zones,
> assuming the
> app is published in all zones... However in PS3 you can load
> balance just
> with zones by turning off 'share load information between zones'.
> Turningthis off effectively stops intra ZDC comms between the
> zones.. which is good
> for farms split across high latency WAN links.
>
> A question I have is... if you turn off the 'share load info',
> then, when a
> zone is at 100% capacity, can it be configured such that a client
> is then
> failed over to another zone??
>
> cheers, Brianos
>
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [thin-bounce@xxxxxxxxxxxxx]On
> Behalf Of cherie.watts
> Sent: 26 July 2004 05:37
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Load Balancing across Zones
>
>
>
> Hi
>
> Does anyone load balance applications across Zones? I am wondering how
> efficient/effective the load balancing is in this configuration.
>
> Thanks
>
> Cherie Watts
>
>
>
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