Endace DAG 9.2X2 - Example 1

EDM01-36v10 DAG_9.2X2_Card_User_Guide - Guidance for stream buffer sizing
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Example 1
Example network parameters:
Field Value
Network speed
10 Gigabits per second
Stream Buffer Size
To calculate
Max Network Rate
8 Gigabits per second per stream
Average Processing Rate
6 Gigabits per second per stream
Number of streams
1
To calculate the stream buffer size range for a network with the above parameters, calculate the stream
buffer size using the maximum burst duration and the maximum latency formulas as shown below.
Stream buffer burst duration
This formula calculates the minimum stream buffer size required to handle a particular burst duration.
Stream buffer Latency
This formula calculates the maximum stream buffer size guaranteeing a particular latency.
For traffic with one second maximum burst duration and 0.4 second maximum latency:
• Stream buffer based on burst duration = 244 MiB
• Stream buffer based on latency = 292 MiB
Therefore a stream buffer size between 244 and 292 MiB is required (in a multiple of 4 MiB).