If you have been seeing unexplained gaps in graphs or maybe whole datasets missing you should upgrade RRDTool.
rrdtool version 1.7.1 needs to be installed. The following steps are just an example. These worked in the Opmantek servers, but the commands may not be the same for various versions of Linux.
Step #1 - Download rrdtool version 1.7.1 from here:
Step #2 - Remove old rrdtool
apt-get purge rrdtool
yum remove rrdtool
Step #3 - Compile and install rrdtool 1.7.2
put rrdtool-1.7.1.tar.gz in the /root directory.
where would you like to install RRD Tool? Some people prefer /opt/rrdtool, while others might want /usr/local/rrdtool
Install to /opt/rrdtool
Install to /usr/local/rrdtool
Step #4 - Verification
root@deb8:~/rrdtool-1.7.1# /path/to/rrdtool/bin/rrdtool --version
RRDtool 1.7.1 Copyright by Tobias Oetiker <firstname.lastname@example.org>
Compiled Oct 17 2018 13:39:32
Step #5 - Point NMIS at new rrdtoolInstall the attached uselib.pm in /usr/local/nmis8/lib/NMIS
If you chose to use /opt/rrdtool, you will need to tell NMIS where it is, so
Step #6 - Run fix perms