rrdcached: move queue length decrement into remove_from_queue

[rrdtool.git] / doc / cdeftutorial.pod

diff --git a/doc/cdeftutorial.pod b/doc/cdeftutorial.pod
index fc24a34..72d1807 100644 (file)
--- a/doc/cdeftutorial.pod
+++ b/doc/cdeftutorial.pod
@@ -4,8 +4,13 @@ cdeftutorial - Alex van den Bogaerdt's CDEF tutorial
 
 =head1 DESCRIPTION
 
 
 =head1 DESCRIPTION
 

-If you provide a question, I will try to provide an answer in the next
-release of this tutorial. No feedback equals no changes! Additions to
+Intention of this document: to provide some examples of the commonly
+used parts of RRDtool's CDEF language.
+
+If you think some important feature is not explained properly, and if
+adding it to this document would benefit most users, please do ask me
+to add it.  I will then try to provide an answer in the next release
+of this tutorial.  No feedback equals no changes! Additions to

 this document are also welcome.  -- Alex van den Bogaerdt
 E<lt>alex@ergens.op.het.netE<gt>
 
 this document are also welcome.  -- Alex van den Bogaerdt
 E<lt>alex@ergens.op.het.netE<gt>
 


@@ -612,7 +617,7 @@ numbers (or zero) only.
 Let's compile the complete CDEF:
 
        DEF:ds0=router1.rrd:AVERAGE
 Let's compile the complete CDEF:
 
        DEF:ds0=router1.rrd:AVERAGE

-       CDEF:ds0modified=TIME,begintime,GE,TIME,endtime,LE,*,UNKN,ds0,IF
+       CDEF:ds0modified=TIME,begintime,GT,TIME,endtime,LE,*,ds0,UNKN,IF

 
 This will return the value of ds0 if both comparisons return true. You
 could also do it the other way around:
 
 This will return the value of ds0 if both comparisons return true. You
 could also do it the other way around:


@@ -744,7 +749,7 @@ as follows:
    5. push 32
    6. push function "plus" and process it
       the stack contains now the temperature in Fahrenheit
    5. push 32
    6. push function "plus" and process it
       the stack contains now the temperature in Fahrenheit

-   
+

 =head2 Changing unknown into zero
 
    rrdtool graph demo.png --title="Demo Graph" \
 =head2 Changing unknown into zero
 
    rrdtool graph demo.png --title="Demo Graph" \