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

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1.1 Reporting Traffic usage reports are provided for bit, packet, and flow rates in tables, pie charts, and interactive graphs. The reports contain information about single or combinations of the following traffic aspects: • Applications (for example, mail, http, backup, printer, Lotus Notes) • Hosts and servers • Domains defined by lists of subnets, autonomous systems, or flow filters • Individual end-to-end flows • Traffic types (for example, unicast, broadcast, multicast, IPv4/IPv6, ICMP) • Service types (for example, IETF DiffServ) • Protocols (for example, TCP, UDP, ICMP) • TCP/UDP ports and services (for example, DFS, DNS, SSH, telnet, POP3, SMTP) • Flow-information exporters and interfaces Total traffic volumes are reported by direction (sent or received) for all configured aspects. Reports are automatically generated for selected periods, in PDF format. You can use Tivoli Netcool Performance Flow Analyzer to generate customised reports in HTML, JSON, and as textual output, using the flow analyzer application programming interface (API), see Appendix A. Tivoli Netcool Performance Flow Analyzer supports domain views including 95th-percentile computation per direction, see Appendix B. User-defined combinations of traffic aspect components provide better understanding of end-to-end traffic flows. An example of a user-defined aspect is a quality-of-service breakdown by application and source or destination autonomous system. 1.2 Aggregation database Traffic flow profiling requires advanced database technology to handle high flow volumes in large enterprise and service provider infrastructures. Tivoli Netcool Performance Flow Analyzer uses an aggregation database (ADB) that is specifically designed for efficient memory and storage footprints. The ADB provides a mechanism for efficient incremental storage of primary traffic data values which are associated with time intervals. The database stores data values in groups of circular arrays of period-dependent resolution. Therefore, the database is able to handle large flow data sets with fast access times and limited storage. The ADB uses lower resolution for arrays that cover longer time periods. Additionally, the design of the ADB reduces memory-to-disk synchronization and accelerates data import and export. Users can quickly change their viewpoint when looking at traffic flows. Because data is represented in the ADB for multiple viewpoints, flow files do not have to be reanalyzed or newly indexed. Array grouping in the ADB optimizes the creation of sorted views of related parameters. This feature is of great importance to efficiently display sorted lists of top protocols, top hosts, top flows, and so on. The ADB supports period durations of hour, day, week, month, quarter, and year. 6 IBM Tivoli Netcool Performance Flow Analyzer: Installation and User Guide
1.3 High performance and scalability 1.4 User interface 1.5 Interoperability Tivoli Netcool Performance Flow Analyzer is designed for high performance. The system uses parallelism on multicore architectures and uses a fast in-memory ADB. A single installation can accommodate flow-information records that are exported from many routers, switches, and interfaces. On a typical dual-core server with default configuration, a processing speed of 50,000 flows per second can be achieved. Higher flow rates require more resources, a distributed setup, or a less complex configuration. The user interface of Tivoli Netcool Performance Flow Analyzer is Web-based and exists over Secure Socket Layer, when configured on the Web server. Built-in user management provides user roles with password-protected access. Configuration of user roles, aspect composition, and item grouping (for example, domain definition) is supported in the user interface. Tables, pie charts, and graphs are linked and enabled to interactively drill down based on AJAX/SVG. The interactive functions are as follows: • Ability to drill down time ranges in graphs • Pop-up legends inside graphs • Ability to show or hide breakdown items that includes total of non-classified items • Selection of sorting criteria by direction- sent, received, total • Selection of units- octets, packets, flows • Selection of scaling- linear, log, trend • Automatic time scrolling Tivoli Netcool Performance Flow Analyzer offers an API to the flow analyzer daemon. All configuration, control, and database access functions are supported by the API. The API is also used for scripted output (for example, in CSV and PDF format). Periodically, advanced users can write custom scripts to export into a desired output format. The scripting language can also be used for event notification. Events can be signalled as syslog messages. © Copyright IBM Corp. 2004, 2010 7
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