56 Planning: MD3200 Series Storage Array Terms and Concepts
5
Click
Start
.
Values appear for the selected storage arrays in the Performance Monitor
data table. The table is updated at the interval specified in the Polling
Interval setting.
6
Click
Update
to force an immediate poll of the storage array.
7
Click
Stop
to stop monitoring the storage array.
8
Click
Save As
on the Performance Monitor main dialog to save the
currently displayed performance statistics.
9
Select an appropriate directory.
10
Type a file name in the
File name
text box.
NOTE: The .perf extension is the default.
11
Select a file type from the Files of type list.
•Use the
Report format
(ASCII text) file type if you want to save the
data to a report form for viewing or printing.
•Use the
Comma Delimited Format
file type if you want to save the
data in a form that can be imported into a commercial spreadsheet
application for further analysis. Most leading commercial spreadsheet
applications recognize a comma delimiter. These applications use the
delimiter to import the data into spreadsheet cells.
12
Click
Save
.
The Performance Monitor data provides information about how your storage
array is performing. The data is presented in eight columns, which are
described in this table. Use this data to make performance tuning decisions
for your storage array.
Table 4-3. Performance Monitor Table Description
Column Headings Description
Devices Controller, virtual disk or storage array total.
Total IOs Cumulative IO’s per second from last start time.
Read Percentage Percentage of cumulative IO’s that are READs.
Cache Hit Percentage Percentage of cumulative IO’s that are in-cache.
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