Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Total order broadcast is a fundamental communication primitive for the construction of highly-available systems. Informally, the primitive guarantees that messages sent by a group of processes are delivered to all processes in the same order. This paper investigates the design and performance of a very simple synchronous total order broadcast that is built atop of an asynchronous distributed system based on a broadcast network. Our Time Hybrid Total Order Broadcast (THyTOB) explores the inherent synchrony of the broadcast network to build a total order for the messages, while ensuring safety under asynchrony and in the presence of process failures. We assess the performance of THyTOB in an Ethernet-based commodity cluster, and show that it is on a par with the performance of other well-known, and more complex total order broadcast protocols inherently designed for the asynchronous model. (C) 2014 Elsevier Inc. All rights reserved.77 2640Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [2010/14555-6, 2011/23705-4]CNPq [473340/2009-7]