Changes between Version 7 and Version 8 of GEMINI/Tutorial/GEC17/GENI_Desktop_and_GEMINI_blipp/ExecuteExperiment


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Timestamp:
07/18/13 11:03:03 (6 years ago)
Author:
kissel@cis.udel.edu
Comment:

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  • GEMINI/Tutorial/GEC17/GENI_Desktop_and_GEMINI_blipp/ExecuteExperiment

    v7 v8  
    1515=== The role of BLiPP ===
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    17 BLiPP is a measurement agent that runs on every GEMINI experiment node within your slice.  Through a web interface and/or command line, you can configure BLiPP to collect both passive and active measurements from the given node.  BLiPP retrieves its configuration from a central information store known as UNIS, the contents of which we update through the configuration interfaces.  BLiPP will then store measurement data to a measurement store (MS) running on the GEMINI global node within your slice.
     17BLiPP is a measurement agent that runs on every GEMINI experiment node within your slice.  Through a web interface and/or command line, you can configure BLiPP to collect both passive and active measurements from the given node.  BLiPP retrieves its configuration from a central information store known as UNIS, the contents of which we update through the configuration interfaces.  BLiPP will then store measurement data to a measurement store (MS) running on the GEMINI global node within your slice.  Each measurement is associated with one or more "event types" that identify what metric(s) are collected for a given measurement.  These event types are displayed in a drop down box next to the configured measurements with an option for graphing the collected data.
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    20 === Access the BLiPP configuration page ===
     20=== Configure BLiPP measurements ===
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    2222From the GENI Desktop page, click on the [[Image(launcher.png)]] and then select 'GEMINI GN' from [[Image(launchermenu.png)]].  Select 'Open PS Config' from the new GN window: [[Image(psconfig.png)]]
     
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    3434[[Image(ping_test.png, 30%)]]
     35----
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     37Once configured, BLiPP will poll UNIS, update its configuration, and begin collecting the desired measurements.  The event types for each measurement will be displayed alongside each scheduled test row.  Once data is available (give it a few minutes to begin collecting!), you can select an event type and display the associated graph.
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    3942!NetLogger is a set of software tools that can be used to log application events and perform analysis and debugging of the collected log data.  The python netlogger tools and libraries are installed on your slice nodes by default with GEMINI.  More details and software can be obtained from the !NetLogger website [[http://netlogger.lbl.gov/]]
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     44An application instrumented with !NetLogger can output log messages to a file in a standardized format.  BLiPP has a netlogger probe that can parse this log file and report the measurements to the measurement store on your global node.  In this way, measurement data collected from experiments in your slice will be in the same format as the other GEMINI measurements.  This also means they are accessible in a common location and also archived to iRODS along with any other measurements collected through the GEMINI system.
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     46To configure a !NetLogger probe, you simply add another BLiPP test as shown below.
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     48[[Image(nl_probe.png), 30%]]
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