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Section 3 Planning
This section describes how to plan the features, size, and configuration of the
VMware ESX(i)-based 800xA system. The objective is to determine the hardware
and software requirements for VMware ESX(i) servers to make the right purchases.
System Planning
The first stage to planning the system is to confirm that the required server node
types are supported for virtualization. This is documented in the System 800xA 5.1,
5.0, 4.1, 3.1 Third Party Software (3BUA000500*).
Essentially, the configuration and dimensioning rules for 800xA server nodes stated
in the System 800xA System Guide Technical Data and Configuration
(3BSE041434*) instruction should be kept the same when the node is installed
inside virtual machines. Given that these rules are followed, with additions and
limitations given in this document, the performance data stated in the system guide
will be fulfilled.
Use the 800xA System Planner tool to determine the types and number of 800xA
nodes for a system.
For high system reliability, it is required to use two VMware ESX(i) servers - one
primary and one secondary - as shown in Figure 3. Place all primary 800xA server
nodes on the primary VMware ESX(i) server and place the secondary 800xA server
nodes on the secondary VMware ESX(i) server. If one VMware ESX(i) server fails,
all redundant 800xA server nodes on the other VMware ESX(i) server are available.
The 800xA system configuration rules state that some server nodes may not be
combined such as Information Management with Foundation Fieldbus. However, it
Do not place primary and secondary 800xA server nodes on the same VMware
ESX(i) server (single point of failure).
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