Systems, Network, and Administration Podcast. Every two weeks TechSNAP covers the stories that impact those of us in the tech industry, and all of us that follow it. Every episode we dedicate a portion of the show to answer audience questions, discuss best practices, and solving your problems.
397: Quality Tools
Join Jim and Wes as they battle bufferbloat, latency spikes, and network hogs with some of their favorite tools for traffic shaping, firewalling, and QoS.
Plus the importance of sane defaults and why netdata belongs on every system.
Why you want QoS - Netdata Documentation — One of the features the Linux kernel has, but it is rarely used, is its ability to apply QoS on traffic. Even most interesting is that it can apply QoS to both inbound and outbound traffic.
FireQOS Wiki — FireQOS is a helper to assist you configure traffic shaping on Linux.
tc(8) man page — Traffic Control consists of the following:
When traffic is shaped, its rate of transmission is under control. Shaping may be more than lowering the available bandwidth - it is also used to smooth out bursts in traffic for better network behaviour. Shaping occurs on egress.
By scheduling the transmission of packets it is possible to improve interactivity for traffic that needs it while still guaranteeing bandwidth to bulk transfers. Reordering is also called prioritizing, and happens only on egress.
Where shaping deals with transmission of traffic, policing pertains to traffic arriving. Policing thus occurs on ingress.
Traffic exceeding a set bandwidth may also be dropped forthwith, both on ingress and on egress.
Overview of Traffic Control Concepts — Traffic control is the name given to the sets of queuing systems and mechanisms by which packets are received and transmitted on a router. This includes deciding which (and whether) packets to accept at what rate on the input of an interface and determining which packets to transmit in what order at what rate on the output of an interface.