Release 10.1C: OpenEdge Replication:
User Guide


Estimating network bandwidth

Calculating OpenEdge Replication’s effect on the network involves many different factors.

After-image data is the largest part in determining how much bandwidth will be needed. Exact data volume cannot be accurately calculated, as it depends on the type of transactions within the application and how much activity is going on against the database. However, it can be estimated if you know the average amount of after-image volume on your system. Use the following formula to help you calculate the values for capacity planning:

AID x AIRM = AIDR 
AIDR x AIRO = AIDRO 
AIDRO X (PRD) = AIDROP 

AID

The total size of all the after-image blocks

AIRM

The value 1.5, which is the multiplier for additional after-image notes due to Replication

AIDR

The number of after-image blocks with Replication

AIRO

The value 1.1, which is the multiplier for Replication overhead

AIDROP

The number of after-image blocks with Replication and overhead

(PRD)

The period of time, as follows:

Examples

Consider the following example, in which:

In this case, this customer would send approximately 146.85 megabytes of data to the target database per hour.

In the example that follows:

This customer would send approximately 422 kilobytes of data to the target database per minute.


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