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Cisco MDS 9000 Fabric Manager Switch Configuration Guide
OL-7753-01
Chapter 3 Overview of Fabric Manager
Using Performance Manager
Step 7
Enter the name of the file (the default is the switch’s IP address with a .XML suffix).
Step 8
Select the definitions that you wish to remove, then click
Finish
to create the configuration file.
Note
The FV Interface mentioned at the bottom of the second screen of this wizard is the Veritas
virtualization interface. It is documented in the Veritas documentation.
Collecting the Data
One year’s worth of data for two variables (Rx and Tx Bytes) requires an rrd file size of 76K. The default
internal values are:
•
600 samples of 5 minutes (2 days and 2 hours)
•
700 samples of 30 minutes (2 days and 2 hours, plus 12.5 days)
•
775 samples of 2 hours (above + 50 days)
•
300 samples of 1 day (above + 300 days, rounded up to 365)
A 1000-port SAN requires 76MB for a year’s worth of historical data. If there were 20 switches in this
SAN with equal distribution of fabric ports, about 2-3 SNMP packets per switch would be sent every 5
minutes for a total of about 100 total request/response SNMP packets required to monitor the data.
Flows, because of their variable counter requests, are more difficult to predict. But as a rule of thumb,
each extra variable adds another 38K.
The Performance Manager collector is designed to run as a background process on the various supported
OSs. On Microsoft Windows, it runs as a service.
Presenting the Collected Data
The Summary page presents the top 10 Hosts, ISLs, Storage, and Flows by average throughput for the
last 24 hour period. This period changes on every polling interval ñ this is unlikely to change the average
significantly, but it could affect the maximum value. The intention is to provide a quick summary of the
fabric’s bandwidth consumption and highlight any hotspots.
•
Clicking on any Host, Storage, ISL, or Flow title will provide a view of traffic over the past day for
all Hosts, Storage, ISLs, or Flows respectively.
•
Clicking on a host port from the summary page will provide you with a similar detail page. If flows
exist for that port, you could see which storage ports it was sending data to.
•
Clicking on the ISLs link from the summary page will list the daily traffic charts for all monitored
ISLs in the fabric.
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