Appendix A. Performance data and statistics gathering 743
/SM590000Nv_stats_<node_id>_<date>_<time> for Volumes statistics
/SM590000Nn_stats_<node_id>_<date>_<time> for node statistic
/SM590000Nd_stats_<node_id>_<date>_<time> for drives statistic
The node_id is the name of the node on which the statistics were collected. The date is in the 
form <yymmdd> and the time is in the form <hhmmss>. The following example shows an MDisk 
statistics file name:
Nm_stats_113986_161024_151832
Example A-3 shows typical MDisk, volume, node, and disk drive statistics file names.
Example A-3   File names of per node statistics
IBM_Storwize:ITSO-V7k:superuser>lsdumps -prefix /dumps/iostats
id filename
0  Nd_stats_7822DFF-2_181101_173808
1  Nn_stats_7822DFF-2_181101_173808
2  Nv_stats_7822DFF-2_181101_173808
3  Nm_stats_7822DFF-2_181101_173808
4  Nm_stats_7822DFF-2_181101_175308
5  Nv_stats_7822DFF-2_181101_175308
6  Nd_stats_7822DFF-2_181101_175308
7  Nn_stats_7822DFF-2_181101_175308
...
60 Nm_stats_7822DFF-2_181101_212314
61 Nn_stats_7822DFF-2_181101_212314
62 Nd_stats_7822DFF-2_181101_212314
63 Nv_stats_7822DFF-2_181101_212314
Real-time performance monitoring
IBM Storwize V7000 supports real-time performance monitoring. Real-time performance 
statistics provide short-term status information for the Storwize V7000. 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/Os operations per second (IOPS), and a view of bandwidth over time. 
Each node collects various performance statistics (mostly at 5-second intervals) and the 
statistics that are available from the config node in a clustered environment. This information 
can help you determine the performance effect of a specific node.
Tip: The performance statistics files can be copied from the Storwize V7000 nodes to a 
local drive on your workstation by using pscp.exe (included with PuTTY) from an MS-DOS 
command line, as shown in this example:
C:\Program Files\PuTTY>pscp -unsafe -load ITSO-V7K 
superuser@192.168.100.100:/dumps/iostats/* c:\statsfiles
Use the -load parameter to specify the session that is defined in PuTTY.
Specify the -unsafe parameter when you use wildcards.
You can obtain PuTTY from this website.