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  The File I/O Performance Monitor

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Big Picture

hIOmon Presentation Client Screen Shots -
 I/O Trace Write Display Example

Product Info

The hIOmon Presentation Client "I/O Operation Trace Display" (available through the hIOmon "I/O Trace Data Licensing Option") allows you to view detailed I/O operation trace information within a customized tabular format, in either real-time or replay modes.  This display essentially provides a sequential trace of the actual I/O operations which the hIOmon I/O Monitor observed and monitored in accordance with the selected Filter Selection.

The following screen shot (thumbnail below, click on to enlarge) is another example of the hIOmon I/O Operation Trace Display, this time illustrating file write I/O operations captured by the hIOmon™ I/O Monitor.  The file I/O operation performance information included within the display example below is a continuation of the file activity shown in the prior Read File I/O Trace Display example.

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The hIOmon Presentation Client "I/O Operation Trace Display" (shown below) is comparable to the display provided by the FileMon program available from Sysinternals.  hIOmon, however, also provides additional unique features such as a "replay display mode", the user/account name along with the "process image filename" associated with the process, optional sub-millisecond timestamps, and more.  In addition, only hIOmon provides you with "summarized" I/O operation performance metrics that enable you to take a "top-down" approach by starting with the 'summarized' metrics and drilling down (only if necessary) to the "I/O trace" displays.  Such an approach helps you avoid wasting your valuable time, since wading through reams of collected/displayed "I/O trace data" can typically be kept to a bare minimum (if not avoided altogether).

Note that the "summarized" (i.e., aggregated) I/O operation performance metrics can also be displayed by the hIOmon WMI support, the hIOmon CLI support along with the hIOmon Performance/System Monitor support.  The particular summarized metrics of interest (as well as your specific "I/O trace" metrics of interest) can also be easily exported to CSV files.   

An excerpt of the "How fast are your files?™  A Case for Monitoring File I/O Performance" white paper was once again used as the file for this example.  The size of this file was 140,764 bytes.  Likewise, the "engCenter" Filter Selection (including the "Trace Records" checkbox modification) along with the file Alert thresholds used in the prior Read File I/O Trace Display example remained in effect.

The file write I/O operations shown in this screen shot were produced by simply overwriting the white paper excerpt file (used in the prior Read example) with an identical copy of the same file.

The many display feature highlights noted in the Read File I/O Operation Trace Display example (such as precision time stamps, file Alerts included within the display, process ID, customized columns, etc.) equally apply to this write display example as well.  However, one feature not shown in the Read display example is the "auto-scroll" option.

The "auto-scroll" feature of the hIOmon I/O Operation Trace Display gives you the option of having the display automatically scroll to the most-recently updated rows within the table display.  In addition, these most-recently updated rows (representing the most recent I/O operation performance information retrieved from the hIOmon Manager and added to the table display) are also highlighted; a blue background is used for the auto-scroll highlighting in the screen shot example.

The convenient "auto-scroll" feature enables hIOmon to bring the most-recently retrieved I/O operation performance information to your immediate visual attention.  

The "Table Options" button in the display allows you to enable or disable the "auto-scroll" feature.  The hIOmon Presentation Client can also preserve the "auto-scroll" enable/disable setting so that the "auto-scroll" setting will automatically be restored the next time that you use the I/O Operation Trace display with the same hIOmon Profile.

The "auto-scroll" option feature is yet another example of how hIOmon promotes flexible, simple ease-of-use, making hIOmon the diagnostic tool required for a detailed analysis of the file I/O operations underlying your file activity. 

hyperI/O^sm -  improving the performance of storage I/O in computer servers