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How to keep in memory statistic ?

How can I keep (or find back) a variable in a script after the script has run?

I want to check if a file increase in size. I need to store the size temporarly.

I'ld like to avoid using a loop with a timeout and pushing Statistic.FileSize output. I don't know either if it would work.

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aLTeReGo

Why not wait until the next polling interval and use the count statistic as difference operator in the component monitor?

deathunt

How can I do that ?

aLTeReGo

This is covered in the Administrators Guide here -> http://www.solarwinds.com/NetPerfMon/SolarWinds/OrionAPMPHComponentTypesLinuxScript.htm

You can see this option in the component monitor settings pictured below.

Count Statistic as difference.png

deathunt

How do I access back the Statistic.differenceSize I sent in the output when the script run again ???

I want to get Statistic.differenceSize as Input.

I did check the "Count statistic as difference:"

Script Arguments:

'"\\file.txt" 'Args(0)

''''''VBScript below

Set Args = WScript.Arguments

path = Args(0)

differenceSize = Statistic.tailleFichier ' How do I access back the Statistic.differenceSize ???

'Préparation à l'envoi de courriel

Message = sectionFichier(path, differenceSize)

WScript.Echo "Statistic.differenceSize:" & differenceSize

Wscript.Quit(0)

Function sectionFichier(ByVal path, ByVal differenceSize)

'Return a section based on differenceSize value

End Function

aLTeReGo

The count statistic as difference will take the previous value and compare that to the current value. You can then define you thresholds around that. For Example if the previous poll returned the number 5001 and the current poll collects 6489 the value represented is 1488. That's the difference between the two numbers. You can then create a threshold alert if the difference is greater than say "1000" for warning and "2000" for critical. In this example the component would be in a warning status.

Petr.Vilem

Your script is expected to return raw value and difference calculation is done during data processing so statistic data stored to database is not original value returned by script, but its difference from original value returned from previous poll.

deathunt

In other words, I have to make a script to get file size (differenceSize) in the first component.

In my second component I use the value of the first component (differenceSize) to do what I really need (extract the added file section) ?

deathunt

I need to read a file and check if there new data added into the file.

Example:

a.txt got the folowing content: "ABC"

Component run, get file size (3 bytes) and output it in statistic.fileSize.

a.txt got new stuff added to it: "ABC DEF"

Component run, get file size (7 bytes or 4 more byte if you count statistic as difference) and output it in statistic.fileSize

Now I need to know from INPUT the value of statistic.FileSize to get the " DEF" part of the file.

aLTeReGo

The script (a single component monitor) would get the size of the file during the first poll, and each subsequent poll thereafter should calculate the difference from the previous poll as the returned statistic for this component monitor. No changes are needed in your script. Your script simply continues to get the size of the file. We do all the heavy lifting calculating the difference between polls.

deathunt

I need to know from INPUT of my script the value of statistic.FileSize to get the " DEF" part of the file. All all the part that are gonna be add to the file !!!

The new part added to the file (obtain with the FileSize statistic). For this, I need to know what was the fileSize (or Difference) before the new part was added . If I could get it from script LOAD/ argument (INPUT) it would be usefull.

The workaround is to make a SQL to fetch the last row of this stat into the database. It not performant and it more time consuming to make a SQL than just call back the value "Statistic.fileSize" from output a couple of minute ago.