Network performance advisor
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Network Performance Advisor. Tanya M. Brethour NLANR/DAST. Network Performance Advisor. Measures, displays, and analyzes network metrics Uses existing diagnostic tools: ping, traceroute, Iperf, and Web100 integrates them into a common framework

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Network performance advisor

Network Performance Advisor

Tanya M. Brethour

NLANR/DAST

Joint Techs – Columbus, OH


Network performance advisor1

Network Performance Advisor

Measures, displays, and analyzes network metrics

  • Uses existing diagnostic tools:

    • ping, traceroute, Iperf, and Web100

    • integrates them into a common framework

  • Attempts to emulate a junior-level network engineer:

    • Allows users to troubleshoot their own networking problems

    • Advises users on course of action, including “do nothing—your network performance is as good as possible”

  • Additional tools and analyses are simple to add

Joint Techs – Columbus, OH


Overview

Overview

  • Performance Data Collector (PDC)

    • Gathers network performance data

  • Performance Data Historical Archiver (PDHA)

    • Archives network performance data

  • Analysis Engine

    • Analyzes network data

    • Provide plain text advice to solve problems or increase performance

  • GUI

    • Expert Interface: table & tree of metrics

    • Map Interface: graphical display of network

    • Analysis Interface: interact with Analysis Engine

  • All components written in Java and use XML-RPC

Joint Techs – Columbus, OH


Performance data collector

Performance Data Collector

  • Designed to be stand-alone, extensible, and portable

  • Elegantly handles platform differences and unavailability of any given measurement

  • Overview of Features in Alpha 1.0 Release:

    • Uses bundles to facilitate integration of performance data measurement tools

      • A collection of scripts or Java classes that describe:

        • How to invoke a measurement tool

        • What metrics the measurement tool measures

        • How to parse the measurement tool's output

    • Implements an XML-RPC interface

      • getAllMetrics: returns the list of metrics that may be measured

      • getMeasurement, getMeasurements, getAllMeasurements: returns an individual, a list, or all measurements given a remote host

Joint Techs – Columbus, OH


Pdc features

PDC Features

  • Overview of Features in Alpha 1.0 Release:

    • All requests are fulfilled immediately without any caching

    • Activation

      • Allows cooperation of both ends through a mechanism called activation (i.e. for tools such as Iperf)

    • Security

      • Using SSL and username/password (more to come)

    • Autoupdating

      • Periodically updates the bundles (automatically)

      • User can set how often to check for updates

      • All system bundles updated

      • Tool to update bundles on demand

Joint Techs – Columbus, OH


Pdc features1

PDC Features

  • Alpha 1.1 Release Features (July 2004)

    • NMWG Response Schema

      • Full Java class support for reading and writing in the schema

    • Bundle support for NMWG Response Schema

    • Several bug fixes

  • Future development of PDC

    • Using the request and discovery schemas

    • Report cost of metrics

    • Adding bundles

    • Investigate moving from RPC/literal to fully document/literal

Joint Techs – Columbus, OH


Performance data historical archiver

Performance Data Historical Archiver

  • Short to medium-term storage of PDC measurements

  • Initial Release Features:

    • Act as a caching proxy for the PDC

    • Utilizes an XML-RPC interface to retrieve data

      • Clients can retrieve old measurement results and the latest measurement results

      • Clients can force PDHA to request new measurements from PDC

    • To retrieve archived measurements specify an

      • interval: returns all measurements taken during the specified interval

      • list of timestamps: returns all measurements that match a timestamp in the list, with some amount of error allowed.

    • Allow different performance measurements to have different "lifetimes“

    • Stores data on disk in XML file

Joint Techs – Columbus, OH


Network performance advisor

PDHA

  • Initial release September 2004

    • Includes all features mentioned

  • Future Development:

    • Allow customization of how often, and how much historical performance data is stored and ways to manage this data.

    • Allow the retrieval of historical data by date and time from third party databases

Joint Techs – Columbus, OH


Analysis engine

Analysis Engine

  • Analyze the metrics for a specific end-to-end path and give advice to solve any performance or connectivity problems

  • Features:

    • “Test Definition Files” (TDFs) similar to PDC’s ADFs

      • Redesigned!

      • TDFs consist of

        • detection Rules

        • synthetic metrics file

        • problem descriptions, and solutions

      • Synthetic Metrics

        • binary Operations on metrics

        • may be written in any scripting language (and eventually Java)

    • Constructs decision trees to efficiently determine problems

Joint Techs – Columbus, OH


Analysis engine1

Analysis Engine

  • Current Status

    • Currently writing a set of Test Definition Files for initial release.

      • Example TDFS include: Duplex mismatch, incorrect buffer sizes, incorrect settings, congestion, general connectivity issues.

  • Initial public release September 2004

  • Future Development:

    • More TDFs (design of the TDFs will continue to evolve)

    • Sort trees by updated cost and probability

    • Relate TDFs to each other

    • Modify AE to use historical data

    • Engage the network engineering community to obtain more analysis test cases

Joint Techs – Columbus, OH


Advisor gui

Advisor GUI

  • Three main graphical displays

    • Expert GUI: Displays all metrics

      • uses a tree to organize metrics

      • uses a table to display metrics and corresponding information

    • Analysis GUI: Displays advice reported from the analysis engine

      • simple text display

    • Map GUI: Visually display of the network and trouble spots

      • users will be able to click on the map to view measurements for specific areas along the path

Joint Techs – Columbus, OH


Advisor gui1

Advisor GUI

  • Current Status:

    • Expert GUI alpha version complete and released

      • Has been updated for display NMWG schema additional information.

    • Simple Analysis Engine GUI completed (will be revised for September release)

    • No development work on Map GUI at this time.

Joint Techs – Columbus, OH


Releases

Releases

  • Summary of release schedule

    • July 2004: Alpha 1.1 release

      • Includes NMWG response schema and other changes

    • September 2004: Alpha 1.2 release

      • Focus on fixes to the AE and PDHA since their initial release

      • Additional tests added to the Analysis Engine

Joint Techs – Columbus, OH


Join us

Join us!

  • We need your help!

    • Join our mailing list (advisor-users)

    • Download the 1.1 release at the end of the month or the 1.2 release at the end of August.

    • Write bundles for your favorite network diagnostic tools

    • Submit bug reports

    • Write TDFs and stress our new design

    • Tell us what we are doing right or wrong!

  • http://dast.nlanr.net/projects/advisor

Joint Techs – Columbus, OH


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