Hp Command View Evaperf Command Options; Running Hp Command View Evaperf - HP 6400/8400 Software Manual

• Identify a period of time when you anticipate the I/O load on the storage system will be low. This
is the window to focus on when running HP Command View EVAPerf to gather I/O data.
• Run HP Command View EVAPerf to gather I/O data during the chosen window. For example, if
you suspect that I/O load may be low between midnight and 2 AM on Sunday morning, run HP
Command View EVAPerf during this period.
• If the I/O pattern is low, capture the data over the same time period several more times to ensure
the low I/O pattern is repeatable.
• When you have selected a potential time period for the upgrade, perform the following steps to
ensure I/O activity does not increase unexpectedly during the upgrade:
• Alert all system users of the need to minimize the load on the storage system during the time
period you have selected for the upgrade.
• Identify any automated processes that may increase I/O load during the upgrade period, in-
cluding backup applications and scripts. Ensure these processes are suspended for the duration
of the upgrade.

HP Command View EVAPerf command options

The following options are used with the HP Command View EVAPerf commands:
• -csv: Use comma separated output. This format is useful for importing large amounts of data into
a spreadsheet for analysis.
• -cont n: Runs the command continuously at an interval specified by n. The default interval is
one second.
• -dur n: Specifies the duration of a continuous mode session. For example, if you enter evaperf
hps -cont 2 -dur 30, host port data is displayed at two second intervals for a total of 30
seconds.
• -sz array: Limits data collection to the specified array(s). You must enter at least one array and
can use either the storage system WWN or friendly name.
• -fo filename: Directs output to a specified filename. Include the path information as necessary.

Running HP Command View EVAPerf

1. Double-click the HP Command View EVAPerf icon on the desktop. The HP Command View EVAPerf
command window opens.
2. Enter the following command to capture and display the total IOPS (Req/s) and throughput
(MB/s):
evaperf as -cont
Select an interval and duration that will enable you to view a period that may include a low I/O
activity. For example, collect data once every 10 minutes for a period of 6 hours around the time
of day you plan to do the upgrade. This is to familiarize yourself with characteristic IOPS and
throughput values. For example, the following command will capture data at 10 minute intervals
for 6 hours on an array named EVA1 and store the output in a file named EVA_upgrade:
evaperf as –cont 600 –dur 51600 –sz EVA1 -fo C:\EVA_upgrade
To see your own friendly names, run HP Command View EVAPerf with the fnh command and
list the names with the EVAPerf ls command.
28 Pre-upgrade tasks
n –dur n –sz array -fo filename