8x00 Enterprise Virtual Array Updating Product Software Guide XCS 6.110 (5697-6782, June 2007)

ManualsBrandsHP ManualsStorageHP 6100 Enterprise Virtual Array

• -dur n:Speciﬁes the duration of a continuous mode session. For example, if you enter

evaperf hps -cont 2 -dur 30, host p ort 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 W WN or friendly name.

• -fo filename: Directs output to a speciﬁed ﬁlename. Include the path informa tion as

necessary.

Running HP Com

mand 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 fol

lowing command to capture and display the total IOPS (Req/s) and throughput (MB/s):

evaperf as -cont n –dur n –sz array -fo filename

SelectanintervalanddurationthatwillenableyoutoviewaperiodthatmayincludealowI/O

activity. Fo

r example, the following command will capture data at 15 second intervals for 2 hours on

an array nam

ed EVA1 and store the output in a ﬁle named EVA _upgrade:

evaperf as –cont 15 –dur 7200 –sz EVA1 -fo C:\EVA_upgrade

3. When the command has completed, op en the ﬁ le in an ASCII editor. Identify any instances where

the IOPS and throughput limits have been exceeded. If the lim its have not been exceeded, this

may be a good period to p erform the upgrade.

NOTE:

Another option for displaying HP Command View EVAPerf data is to use the -csv

command option, which saves the data as comma separated values for importing into a

spreadsheet. This may be useful for analyzing large amounts of data.

Identifying virtual disk activity

If you cannot locate a period that meets the necessary I/O l o ad requirements, it may be possible to

identify speciﬁc applications that are imposing heavy I/O load s, and suspend them long enough to

perform the upgrade. This can be done by using HP Command View EVAPerf to view virtual disk activity.

For example, after running HP Command View EVAPerf, you determine that all the virtual disks on the

storage system are nearly idle with the exception of one virtual disk. To per form an online upgrade, it

may be desirable to halt the application that is imp osing the load on the busy virtual disk. This will be far

less disruptive to your environment than p er forming an ofﬂine upgrade.

T o view virtual disk activity:

1. Double-click the HP Command View EVAPerf pro gram icon on the desktop. The HP Command View

EVAPerf command window opens.

2. Enter the following command to display virtual disk activity:

evaperf vd –cont n –dur n –sz array -fo filename

Select an appropriate interval and duration that will enable you to view a period during which

you may want to perform the upgra de. For example, the following command will capture data at

15 second intervals for 2 hours on an array named EVA 1 and store the output in a ﬁle named

virtu a l_disk s:

evaperf vd -cont 15 -dur 7200 -sz EVA1 -fo C:\virtual_disks

3. When the com m a nd has completed, open the ﬁle in an ASCII editor. The virtual disk information will

appear similar to that in Figure 7.

Activity is reported separately for each controller accessing a virtual disk. The total activity for

each virtual disk is the sum of the reported activity for each controller. A virtual disk m ay also be

HP StorageWorks 4x00/6x00/8x00 Enterprise Virtual Array updating product software guide XCS 6.110