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Deploying Equalizer with MS Terminal Services

Deployment Guide

Configuration Example 1:

MSTS/Equalizer Deployment without Session Services

Overview

In an MSTS server farm deployment with no Session Directory or Session Broker

services, users log into a group of MSTS servers that have the same applications

installed, and their files are usually kept on administrator-defined shared

storage. Users may leave a session behind that they want to resume later, but

there is no Session Directory (MSTS 2003) or Session Broker (MSTS 2008) server

configured.

To place Equalizer in front of such a group of independent MSTS servers, a Layer

4 cluster on Equalizer is configured with a sticky time that is equal to the

session time set on the MSTS servers. The first time a client connects to the

MSTS cluster, it is load balanced according to the policy set on the cluster. If

the client disconnects and leaves a session behind on the MSTS server, it will be

resumed the next time the client connects before the session (and sticky)

timers expire.

For example, say ClientA connects to the cluster and is load balanced to

ServerA. The client disconnects and leaves a session behind. The default

expiration time for a session on MSTS is "Never". If you leave the session timer

set to "Never", you'll probably want to set the sticky timer on the cluster to a

suitably large value (like, say, a month or year), so that the client can resume

the session they left behind whenever they get around to it. If ServerA goes

down, the session is lost; Equalizer detects the server is down and routes the

connection to another server, ServerB.

Leaving the MSTS session timer set to 'Never' and the sticky timer to a large

value means, however, that the client's connection is now going to stick to

ServerB until the server goes down or Equalizer reboots. To ensure that

Equalizer's load balancing distributes clients efficiently among the MSTS servers

behind it, the MSTS session timer can be set to a value between 1 minute and 5

days, and a corresponding value set for the cluster's sticky timer. This way,

client connections are re-load balanced at a specified interval.

Also, the max connections value on each server defined on Equalizer should be

set to the maximum connections setting on the associated real MSTS server

minus one, unless server agents are used. See Step 5, below.

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Coyote Point Systems Equalizer Especificaciones Pagina 5