If you have version of CentOS 6.x or CentOS 8.x installed, switch the repository once with the command:

sed -i -e '/^mirrorlist=http:\/\//d' -e 's/^# *baseurl=http:\/\/mirror.centos.org/baseurl=http:\/\/vault.centos.org/' /etc/yum.repos.d/CentOS-*.repo

Then run updates as usual:

yum update fastdpi

After updating, restart the DPI:

service fastdpi restart

and other dependent procoesses (PCRF/Radius), but only if they are actually used and their configuration is valid:

service fastpcrf restart
service fdpi_radius restart

You can update the operating system components ( Do not update the kernel version and its dependent utilities ):

For CentOS 6.x:

yum --exclude=kernel*,util-linux-ng,libuuid,libblkid update

For CentOS 8.x:

yum update

It's essential to update the module for browsing statistics and reports in order to ensure the correct storage and displaying of new protocols.

The idle time of the service (during the restart) takes 1-3 seconds ¹⁾

Note for users running the DPI in a virtual environment, using old CPU (release of 2009) and AMD CPU:
run the following command before the update

touch /etc/dpi/noprioadj

and it causes the DPI process to be launched with normal priority (not the realtime), thus significantly reducing the consumption of CPU system (sys) resourses, but slightly increasing the latency on the platform.