TNPFA 4.1.1 Installation and User Guide - e IBM Tivoli Composite ...

127.0.0.2, HTTP
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Tivoli Netcool Performance Flow Analyzer collects values from emitters based on the configured list of
collected aspects and the associated time periods and unit types. For example, if Tivoli Netcool
Performance Flow Analyzer is configured to collect octets for a day for the Host Application aspect,
then the flow analyzer creates an in-memory database to hold the received data.
The Host Application aspect is made up of two components- IP Address and Application Name. IP
Address comes from the destination address of the flow. Application Name is based on a mapping from
the destination port of the flow to the corresponding application name.
This new database stores the amount of octets received in each of 300 'buckets' of 300 seconds, for each
combination of IP Address and Application Name that it receives from the emitter. The data for each
combination is held in its own Time-Value Array (TVA), that records an amount of traffic reported (an
integer) for an array of time slices (buckets). A TVA can be visualised as being one of a number of
graphs of traffic, that records the data relevant for its own combination of key details.
For example: data is received for two combinations of IP Address and Application Name:
127.0.0.1 and port 80 (HTTP)
127.0.0.2 and port 80 (HTTP)
Therefore, all the periods for this site/domain/aspect/period contain two TVAs (see Figure 3-5).
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Hour Day Week
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127.0.0.1, HTTP 127.0.0.1, HTTP 127.0.0.1, HTTP
127.0.0.2, HTTP 127.0.0.2, HTTP 127.0.0.2, HTTP
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Figure 3-5 TVAs within period
127.0.0.1, HTTP
© Copyright IBM Corp. 2004, 2010 21
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