Dell MD3220i, MD3200i owner manual Performance Monitor Table Description Column Headings

10Type a file name in the File name text box.

NOTE: The .perf extension is the default.

11Select 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.

12Click 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.
Current KB/second	Snapshot of throughput value per second (1KB
	= 1024 bytes).
Maximum KB/second	Maximum recorded throughput value from last
	start time.
Current IO/second	Snapshot of IO’s per second (IOP =
	Input/output per second or one completed I/O
	transaction).
Maximum IO/second	Maximum recorded IOP from last start time.

For more information, see the online help topics.

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Planning: MD3200i Series Storage Array Terms and Concepts