File Server Example

Input Data

The input data:

The input file looks like:

2 -2140595955 782593880(0/6/0.58)(0/17/1.48)(82/100/97.93)[0/205/7.3][0/8/0.18][0/8/0.35][0/8/0.22][0/8/0.18][0/8/0.15]{0/205/8.38}
2 -2140595955 782593941(0/3/0.3)(0/19/1.13)(81/100/98.57)[0/67/3][0/0/0][0/4/0.07][0/4/0.08][0/0/0][0/0/0]{0/67/3.15}
...

Problem

We are trying to see if there are any anomalies between the file servers.

Visualization

click here to see our model of creating visualizations.

The visualization is created as follows:

  1. Define the two top views for first file server. In the first view, map date onto X axis, and idle time to Y. In the second view, map date onto X axis, and disk activity to Y axis. Map high system activity to red.
  2. Define the bottom two views the same as the top two, but for a different sensor.
  3. Link the X axes of all the views.
  4. Navigate the views by scrolling or zooming.

Observations

  1. This example illustrates the ability of DEVise to handle large amounts of data. About 6 MB of memory buffer is used to visualize 18 MB of files.
  2. Cycle in the data: low idle and high disk activity is observed every night after midnight, during file backup.
  3. Anomaly observed: The first server contains periods of high system time, but the second file server does not.

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