iostat (Input/Output Device Monitoring) Release Notes

The iostat probe is used to monitor the load on server input/output (I/O) devices by observing the time for which the devices are active compared to the average transfer rate of the device. The iostat probe collects disk QoS data from the iostat command on Solaris, Linux, and AIX. The QoS values are obtained from the second sample values fetched from the devices in use. For example, from Linux machine if you execute the following command:
uimpga-ga
The iostat probe is used to monitor the load on server input/output (I/O) devices by observing the time for which the devices are active compared to the average transfer rate of the device. The iostat probe collects disk QoS data from the iostat command on Solaris, Linux, and AIX. The QoS values are obtained from the second sample values fetched from the devices in use. For example, from Linux machine if you execute the following command:
Iostat -d -x 10 2
2 samples will be created in the interval of 10 seconds and the second sample value will be shown as the QoS values in iostat probe.
Revision History
This section describes the history of the revisions for the iostat probe.
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Version
Description
State
Date
1.10
Added support for parsing output from Linux and AIX iostat commands.
Note:
 Parameters reported by the different iostat implementations differ, so the QOS names differ accordingly.
GA
September
2012
1.10
Added support for parsing output from Linux and AIX iostat commands.
Note: 
Parameters reported by the different iostat implementations differ, so the QOS names differ accordingly.
GA
January
2007
1.01
Added support for Solaris 2.8 iostat output. Added maxvalue for counters representing percentages.
GA
January
2006
Probe Specific Hardware Requirements
The iostat probe should be installed on systems with the following minimum resources:
  • Memory: 2-4GB of RAM. The OOB configuration of the probe requires 256MB of RAM
  • CPU: 3GHz dual-core processor, 32-bit or 64-bit
Probe Specific Software Requirements
The iostat probe requires the following software environment:
  • SDK_Perl and Perl Linux package
    : Use the Perl Linux package for SDK_Perl platform corresponding to the 32-bit or 64-bit version as appropriate.
  • Nimsoft Monitor Server 5.1.1 or later
  • Nimsoft Robot 5.23 or later
  • Java Virtual Machine 1.6 or later (typically installed with NMS 5.0 and above)
  • The sysStat package, RedHat 6.x. The sysStat package contains various system performance monitoring tools.
    By default, the sysStat package is installed with RedHat 6.x. Install it manually with RedHat 5.x. Ensure that the sysStat package has already been deployed on the robot where the iostat probe would be deployed.
  • The iostat probe is supported on the same set of operating systems and databases as the Nimsoft Monitor Server solution. 
Installation Considerations
The probe fails to start if the SDK_Perl package and Perl Linux package are not installed before the installation.
Probe Deployment Information
There are three ways to distribute archive packages. You can distribute the package within the web-based Admin Console (for supported probes), from within Infrastructure Manager, or use the standalone Nimsoft Distribution application.