Category Archives: Technology

DRBD and Nested LVM

DRBD is a opensource block-level storage system designed to provide distributed storage in cluster environments. Nodes of a cluster write changes locally and DRBD replicates those changes to other nodes. It supports both Primary/Secondary (master/slave) and Primary/Primary (master/master) configurations. I’m …

Tripplite Smart UPS: A Review

My experience with Tripplite Smart UPSes has not been very positive, yet I’m required to manage and monitor six of them to prop up our entire IT and broadcast infrastructure. I know these units are rather old, but I want …

AoIP and Liquidsoap

Many modern broadcast facilities, like the one I work at, are fully AoIP enabled. AoIP gives stations great flexibility and availability with their audio sources, and enables engineers to rely less on end-point hardware, like sound cards and processors, that …

Tuning Cisco and Linux IGMP for AoIP

Modern AoIP implementations from vendors like Wheatstone or Telos utilize multicast networking to efficiently deliver audio streams among devices on a network. Without multicast, bandwidth usage and latency on the network can spike. Uplinks connecting access switches with the core …