content_image/972225.jpg
T Tip: The performance statistics files can be copied from the IBM FlashSystem V9000 Controllers to a local drive on your workstation by using the pscp.exe (included with PuTTY) from an MS-DOS command prompt, as shown in this example: 

C:\>pscp -unsafe -load ITSO_FS9100 superuser@9.19.91.95:/dumps/iostats/* c:\statsfiles 

GLYPH<SM590000> Specify the -unsafe parameter when you use wildcards. 

GLYPH<SM590000> Use the -load parameter to specify the session that is defined in PuTTY. 

## The qperf utility 

qperf is an unofficial (no initial cost and unsupported) collection of awk  scripts that was made available for download from IBM Techdocs. It provides a quick performance  overview using the CLI and a UNIX Korn shell (it can also be used with Cygwin on Windows platforms). 

You can download qperf from the following address: 

http://www.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/TD105947 

The performance statistics files are in .xml  format. They can be manipulated by using various tools and techniques. Figure 8-1 shows the type of chart that you can produce by using the IBM FlashSystem 9100 performance statistics. 

<img src='content_image/972225.jpg'>

## Real-time performance monitoring 

IBM FlashSystem 9100 controller supports real-time performance monitoring. Real-time performance statistics provide short-term status information for the system. The statistics are shown as graphs in the management GUI or can be viewed from the CLI. With system-level statistics, you can quickly view the CPU usage and the bandwidth of volumes, interfaces, and MDisks. Each graph displays the current bandwidth in megabytes per second (MBps) or I/O per second (IOPS), and a view of bandwidth over time. 

