FS System: fsstatsdigest utility SAN LUN UI Number of Write Commands May Produce Incorrect Results

Asset ID:	1-72-2151195.1
Update Date:	2016-06-20
Keywords:

Solution Type Problem Resolution Sure

Solution 2151195.1 : FS System: fsstatsdigest utility SAN LUN UI Number of Write Commands May Produce Incorrect Results

Applies to:

Oracle FS1-2 Flash Storage System - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

When using the fsstatsdigest utility to process the statistics, the fsstatsdigest utility will create a file called San_Lun_Ui.xlsx. Viewing file San_Lun_Ui.xlsx and mouse click on tab "Write Second" will show the total number of write commands performed per second for each LUN on the system.

The total number of write commands performed for each LUN may produce incorrect results.

Cause

The cause is due to a calculation error with the fsstatsdigest utility that may result in the total number of write and read commands performed for some LUNs to be exactly the same.

Solution

The fix will be included in FS1-2 release 060204 build 032801 and higher.

If your system is below this release the workaround is to download file fsstatsdigest_rw_fix attached to this document that contains the fix for the issue and use the utility in place of the fsstatsdigest utility that is included in the Oracle FS Statistics for Linux.

For more information on how to download Oracle FS Statistics for Linux please refer to the Oracle Flash Storage System Statistics Tools User's Guide and go to page 26 section "Install the fsstatsdigest Tools".

Once file fsstatstool-linux.tgz has been downloaded and extracted using the following command:

# tar -xzvf fsstatstool-linux.tgz
List the contents of the directory and verify you see the following files:

# ls
fsstatsdefinitions.html
fsstatsdigest
fsstatsformatter
fsstatsparser
fsstatstool-linux.tgz
Copy file fsstatsdigest_rw_fix in the same folder location and list the contents of the directory again to confirm it exists:

# ls
fsstatsdefinitions.html
fsstatsdigest
fsstatsdigest_rw_fix
fsstatsformatter
fsstatsparser
fsstatstool-linux.tgz
Execute fsstatsdigest_rw_fix with an FS1-2 log bundle using the following command:

# ./fsstatsdigest_rw_fix -S -i <FS1-2 log bundle>

Wait for the command to complete then view file San_Lun_Ui.xlsx file

References

<BUG:23526229> - READ AND WRITE IOS ARE EXACTLY THE SAME FOR 2 LUNS

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