You are mixing the old and new GPRINT syntaxes, which is why it doesn’t work.

 

Old deprecated style:

  GPRINT:varname:cf:format

Where ‘varname’ is a DEF or CDEF, and CF is AVG, MAX, MIN, LAST

 

New style:

 VDEF:vdefname=varname,function

 GPRINT:vdefname:format[:strftime]

The new style uses a VDEF in the GPRINT, which has to be defined separately.  
‘function’ is one of the summary stat RPN functions (see the RPN manual) that 
include AVERAGE, MAXIMUM and also the LSL and Percentile calculations.

 

So, to do what you want, you would need to have (using the new syntax) 
something like:

 

  VDEF:ioratemax:iorate,MAXIMUM

  GPRINT:ioratemax:’Maximum IO value %5.2lf%sbps at ’

 GPRINT:ioratemax:%c:strftime

 

Steve

 

Steve Shipway

[email protected]

 

From: [email protected] 
[mailto:[email protected]] On Behalf 
Of Steven Sim
Sent: Thursday, 19 June 2014 3:08 a.m.
To: [email protected]
Subject: [rrd-users] I don't understand ':strftime' in command: 
'GPRINT:IORATE:MAX:%c:strftime'. Error creating the Storage IORATE PNG file

 

Err...

 

I cannot figure out this error ...

 

1341 entries processed!

ERROR: I don't understand ':strftime' in command: 
'GPRINT:IORATE:MAX:%c:strftime'.

Error creating the Storage IORATE PNG file

 

The syntax of the GPRINT command as follows ...

 

.

.

.

HRULE:${_MAXVALUE}${BLUE}:'80% Max Value':dashes

GPRINT:${_METRIC1}:MAX:'Maximum IO value %5.2lf'

GPRINT:${_METRIC1}:MAX:%c:strftime

 

The rrdtool graph render command works just fine until I add the last line

 

What's wrong with the strftime syntax?

 

Deepest Regards

Steven Sim

 

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