La version 4.0 de l'outil CRIU (Checkpoint and Restore In Userspace) a \u00e9t\u00e9 publi\u00e9e, con\u00e7ue pour sauvegarder et restaurer des processus dans l'espace utilisateur. Cet outil permet de conserver l'\u00e9tat d'un ou plusieurs processus, puis de reprendre le travail \u00e0 partir de la position sauvegard\u00e9e, m\u00eame apr\u00e8s un red\u00e9marrage du syst\u00e8me ou sur un autre serveur sans interrompre les connexions r\u00e9seau d\u00e9j\u00e0 \u00e9tablies. Le code du projet est \u00e9crit en langage C et distribu\u00e9 sous la licence GPLv2. CRIU est utilis\u00e9 dans des syst\u00e8mes de gestion de conteneurs tels qu'OpenVZ, LXC\/LXD et Docker. Les modifications n\u00e9cessaires au fonctionnement de CRIU sont incluses dans le noyau Linux principal. <\/p>\n
Parmi les applications de la technologie CRIU, on peut noter la possibilit\u00e9 de red\u00e9marrer le syst\u00e8me d'exploitation sans interrompre l'ex\u00e9cution de processus longs, la migration en direct de conteneurs isol\u00e9s, l'acc\u00e9l\u00e9ration du d\u00e9marrage de processus lents (on peut commencer \u00e0 travailler \u00e0 partir d'un \u00e9tat sauvegard\u00e9 apr\u00e8s l'initialisation), la mise \u00e0 jour du noyau sans red\u00e9marrer les services, la sauvegarde p\u00e9riodique de l'\u00e9tat des t\u00e2ches de calcul longue dur\u00e9e pour reprendre le travail en cas de panne, la r\u00e9partition de la charge entre les n\u0153uds dans les clusters, la duplication des processus sur une autre machine (fork sur un syst\u00e8me distant), et la cr\u00e9ation de snapshots d'applications utilisateur en cours d'ex\u00e9cution pour les analyser sur un autre syst\u00e8me ou au cas o\u00f9 il serait n\u00e9cessaire d'annuler des actions ult\u00e9rieures dans le programme. <\/p>\n
Dans cette nouvelle version : <\/p>\n
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