PostgreSQL (commonly known as Postgres) is a well-known, solid as a rock database. And yes, from time to time it craves for an upgrade too. Today we will learn something about PostgreSQL Windows upgrade from version 9.6 to 12.

KEEP IN MIND: As always, backup your database before starting any upgrade procedure.

The psql upgrade is based on pg_upgrade

Aruba is a global network company, a leader in Wi-Fi technology. Their most renowned merchandise are switches, which are purpose-built for the cloud, mobile and IoT. Users find Aruba CLI very comprehensible and its remarkably well designed GUI contains useful Dashboard and System Monitor.

Aruba switches support sFlow and great thing is that you don't need a lot

Open vSwitch (sometimes called OvS) is an open-source implementation of distributed virtual multilayer switch. The main role of OvS is to provide a switching stack for hardware virtualization and is slowly replacing Linux native bridge/bonds. Open vSwitch can operate as a network switch within VM Hypervisor, as well as in dedicated switching hardware control stack(also known as Software

In a day-to-day life of Network and security admins, QoS (Quality of Service) is a crucial mechanism in ordering all the data that travels through the network. QoS provides traffic prioritization as it enables a different level of importance to different applications to produce the highest level of performance possible.

QoS is based on ToS (Type of Service) or DSCP (Differentiated

A flow in networking terms is a unidirectional set of packets containing common attributes (source and destination IP, ports, protocols, etc). By using a flow protocol (e.g. NetFlow, sFlow, IPFIX), network devices can gather information about these attributes and send assembled information to your collector.

Usually, a big concern is the load on exporters (router, switch, workstation)