[rrd-developers] A tricky issue with rrdtool update command

[Gorijavolu, Suresh]

Hi members,

I had faced an issue with rrdtool and look for your help in resolving
that.  Thanks a billion for all who contributed to the development of
this RRDTOOL. It has been very useful for us in one of our monitoring
apps.

 

Details of the issue

Eco system - RRDtool 1.4.5, PHP 5.3.6

A php parser had executed rrdtool update command 5 times and returns
successful in each case. However the RRDFILE created has only two data
points. The last 3 data points did not show up in the rrd file. 

Removed the parser created RRDFILE and recreated it manually. Tried
update command manually.

 

First instance of command

/usr/bin/rrdtool updatev
/home/cactiuser/CMC/RRDFILE/genband-acut/dc4cam/SSOQ_statistics.rrd
"1323851400:1:0:1:1:0:0:0:1618:1618"

Corresponding data point showed up in RRDFILE

                        <!-- 2011-12-14 03:30:00 EST / 1323851400 -->
<row><v>1.0000000000e+00</v><v>0.0000000000e+00</v><v>1.0000000000e+00</
v><v>1.0000000000e+00</v><v>0.0000000000e+00</v><v>0.0000000000e+00</v><
v>0.0000000000e+00</v><v>1.6180000000e+03</v><v>1.6180000000e+03</v></ro
w>

                  

Second instance of command

/usr/bin/rrdtool updatev
/home/cactiuser/CMC/RRDFILE/genband-acut/dc4cam/SSOQ_statistics.rrd
1323852300:1:0:1:1:0:0:0:2026:2026

Data point showed in the RRDFILE

      <!-- 2011-12-14 03:45:00 EST / 1323852300 -->
<row><v>1.0000000000e+00</v><v>0.0000000000e+00</v><v>1.0000000000e+00</
v><v>1.0000000000e+00</v><v>0.0000000000e+00</v><v>0.0000000000e+00</v><
v>0.0000000000e+00</v><v>2.0260000000e+03</v><v>2.0260000000e+03</v></ro
w>

 

Third instance of command

/usr/bin/rrdtool updatev
/home/cactiuser/CMC/RRDFILE/genband-acut/dc4cam/SSOQ_statistics.rrd
"1323866700:1:0:1:1:0:0:0:1987:1987"

Data point has not shown up in the RRDFILE

<!-- 2011-12-14 07:45:00 EST / 1323866700 -->
<row><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN<
/v><v>NaN</v><v>NaN</v></row>

 

Fourth instance of command

/usr/bin/rrdtool updatev
/home/cactiuser/CMC/RRDFILE/genband-acut/dc4cam/SSOQ_statistics.rrd
1323873900:1:0:1:1:0:0:0:1782:1782

Data point has not shown up in the RRDFILE

<!-- 2011-12-14 09:45:00 EST / 1323873900 -->
<row><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN<
/v><v>NaN</v><v>NaN</v></row>

 

Fifth instance of command

/usr/bin/rrdtool updatev
/home/cactiuser/CMC/RRDFILE/genband-acut/dc4cam/SSOQ_statistics.rrd
1323891900:1:0:1:1:0:0:0:1666:1666

Data point has not shown up in the RRDFILE

<!-- 2011-12-14 14:45:00 EST / 1323891900 -->
<row><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN</v><v>NaN<
/v><v>NaN</v><v>NaN</v></row>

 

The behavior of update command is same when I used update or updatev and
when the values are encased in quotes or without quotes.

 

And the command used to create RRDFILE is

/usr/bin/rrdtool create ${RRD_FILE} \

--start ${3} \

--step 900  \

DS:nb_ops:GAUGE:1800:0:U \

DS:nb_failed_ops:GAUGE:1800:0:U \

DS:nb_success_ops:GAUGE:1800:0:U \

DS:nb_over_green:GAUGE:1800:0:U \

DS:nb_over_yellow:GAUGE:1800:0:U \

DS:nb_over_orange:GAUGE:1800:0:U \

DS:nb_over_red:GAUGE:1800:0:U \

DS:min_time_ops:GAUGE:1800:0:U \

DS:time_ops:GAUGE:1800:0:U \

RRA:AVERAGE:0.5:1:672 \

RRA:AVERAGE:0.5:4:720 \

RRA:AVERAGE:0.5:96:366 \

RRA:AVERAGE:0.5:2880:60 \

RRA:MIN:0.5:1:672 \

RRA:MIN:0.5:4:720 \

RRA:MIN:0.5:96:366 \

RRA:MIN:0.5:2880:60 \

RRA:MAX:0.5:1:672 \

RRA:MAX:0.5:4:720 \

RRA:MAX:0.5:96:366 \

RRA:MAX:0.5:2880:60

 

Thanks in advance for your help.

-          Suresh Gorijavolu

 

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