Publikation

Zurück zur Übersicht

Incremental Dynamic Updates with First-class Contexts

Publikationsart Peer-reviewed
Publikationsform Originalbeitrag (peer-reviewed)
Publikationsjahr 2013
Autor/in Wernli Erwann, Lungu Mircea, Nierstrasz Oscar
Projekt Agile Software Assessment
Alle Daten anzeigen

Originalbeitrag (peer-reviewed)

Zeitschrift Journal of Object Technology
Volume (Issue) 12(3)
Seite(n) 1 - 27
Status Publiziert
DOI 10.5381/jot.2013.12.3.a1

Open Access

Abstract

Highly available software systems occasionally need to be updated while avoiding downtime. Dynamic software updates reduce down-time, but still require the system to reach a quiescent state in which a global update can be performed. This can be difficult for multi-threaded systems. We present a novel approach to dynamic updates using first-class contexts, called Theseus. First-class contexts make global updates unnecessary: existing threads run to termination in an old context, while new threads start in a new, updated context; consistency between contexts is ensured with the help of bidirectional transformations. We show that for multi-threaded systems with coherent memory, first-class contexts offer a practical and flexible approach to dynamic updates, with acceptable overhead.