WO2001084265A2 - Backup and restore system for data derived from a plurality of host equipment in heterogeneous environment - Google Patents

Backup and restore system for data derived from a plurality of host equipment in heterogeneous environment Download PDF

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Publication number
WO2001084265A2
WO2001084265A2 PCT/FR2001/001324 FR0101324W WO0184265A2 WO 2001084265 A2 WO2001084265 A2 WO 2001084265A2 FR 0101324 W FR0101324 W FR 0101324W WO 0184265 A2 WO0184265 A2 WO 0184265A2
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WIPO (PCT)
Prior art keywords
data
backup
equipment
server
host
Prior art date
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PCT/FR2001/001324
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French (fr)
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WO2001084265A3 (en
Inventor
Jean-Marc Delbosc
Hubert Azambre
Claude Blanchet
Original Assignee
Neartek Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Neartek Inc. filed Critical Neartek Inc.
Priority to JP2001580623A priority Critical patent/JP2003532219A/en
Priority to EP01929756A priority patent/EP1285320A2/en
Priority to AU2001256442A priority patent/AU2001256442A1/en
Publication of WO2001084265A2 publication Critical patent/WO2001084265A2/en
Publication of WO2001084265A3 publication Critical patent/WO2001084265A3/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • G06F11/1458—Management of the backup or restore process
    • G06F11/1464—Management of the backup or restore process for networked environments
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • G06F11/1456—Hardware arrangements for backup

Definitions

  • the present invention relates to the field of computer backup and in particular a system for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment.
  • the simplest is a local architecture, intended for the direct and independent backup on each computer equipment of the data on one or more disks or local supports. This solution is of course not the most efficient because it requires the acquisition of a complete backup unit for each piece of equipment, and does not make it possible to optimize the use of the capacities of the backup media.
  • client / server backup architectures There are also known “client / server” backup architectures.
  • Patent WO99 / 66401 describing a data server for backing up and restoring data in a heterogeneous environment is also known in the prior art.
  • the aim of the present invention is to propose a system for backing up disk data on a magnetic medium, allowing centralized backup and pooling of data with a view to optimizing the capacities of magnetic media.
  • the invention relates to a system for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment, comprising a backup server comprising at least one hard disk buffer, the backup server being connected on the one hand to each of the computer equipment by at least one computer network and on the other hand to physical backup units constituted by disk management units and by tape management units, the backup server being controlled by a supervisor program ensuring the communication between the various elements of the system and the processing of the digital data exchanged, characterized in that the backup server comprises an emulation program for the simulation of backup equipment compatible with the environment of the '' any computer equipment to be backed up, and to record an image of a at least part of the disks of the host equipment and to transform the data exchanged with the different host equipment into data in a single format for exchanges with the backup server.
  • the backup system makes it possible to automatically save, according to criteria such as the time, the date, subsets such as "volumes” (in the sense of Microsoft TM [registered trademark] of this term) or "disk partitions” (in the sense of Unix TM [registered trademark] of this term).
  • the server comprises means for encapsulating the data originating from the host devices, for temporarily recording the data thus encapsulated on buffer disks, for grouping the data recorded on the buffer disks and transmitting them to the backup server.
  • the server is connected to the external equipment by a first dedicated high-speed link for the exchange of data to be saved or restored, and by a second link for the exchange of control signals.
  • the invention also relates to a method for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment, comprising a step of activation by a server of the transmission of the data to be saved recorded on the memory of a equipment external to a server for saving and recording said data to be saved on a magnetic medium, characterized in that it includes a step of replicating on a memory of the backup server the physical medium of the memory of each of the host equipments, and a step of processing the data thus replicated for recording on at least one magnetic medium associated with the backup server.
  • the replication step consists of saving a copy of the volumes or volumes on a hard disk of the backup server. disk partitions of at least part of the host equipment.
  • the transmission of the data to be saved between the external equipment and the temporary disk is achieved by a high speed link, such as the fiber optic bus (Fiber Channel).
  • a high speed link such as the fiber optic bus (Fiber Channel).
  • the replication step consists in temporarily suspending the “mirror” function of the RAID 1 (registered trademark) procedure of the host equipment and in recording on a temporary memory the data of the separate part of the mirror of the disk of the host equipment, and rebuilding the mirror after the completion of data replication.
  • RAID 1 registered trademark
  • FIG. 1 shows the block diagram of a system according to the invention.
  • the architecture of an automatic data backup and restoration system comprises:
  • control unit (1) managing the user interface and the database describing the collection of magnetic backup media.
  • host disk management units (2, 3) which transfer the data from the host disks (4 to 7) to the bus (8) of the backup server and vice versa.
  • the control unit (1) controls the host disk management units (2, 3) and the tape management units (9).
  • a disk management system User data from the hard disks of the host devices (4 to 7) is accessed through a disk management system.
  • This management system has mirror (RAID 1 [registered trademark]) and temporary mirror suspension functions, allowing the connection of a host on the separate part of the mirror.
  • the management of modifications (bit-map) during suspension is necessary to allow the mirror to be quickly brought back into conformity.
  • User data is managed with this system. The user continues to work on a branch of the mirror. The other contains the data to be saved. Once the data has been saved, the mirror is reconstituted and the user finds the initial situation.
  • the communications between the various elements of the backup server are provided by a fiber optic bus (8) for networks extending over a few hundred or thousands of meters, or copper for networks of small geographic extension (a few tens of meters). Bus speeds are typically around 100 megabytes in [half duplex]. In case higher flow rates are required, the system can integrate several buses. It is also possible a single machine implementation, therefore without bus.
  • the control unit (1) controls the various elements of the system, through a local network. She understands :
  • - a database containing the links between the backup name, the date, the volumes and magnetic media as well as the location of each magnetic media in the robots.
  • the database also contains the definition of each backup occurrence, defined by its name, and its criteria for implementation (date, time, circumstances) and conservation (date and / or expiration conditions). This database may possibly be split for security reasons.
  • - means of remote control of the host machines.
  • the backup server needs to know the configuration of user disks, which is scalable. When a backup is requested, we build the topology (location of the physical disks, start and end address of the different volumes from the user request which is formed by a sequence of volume names. For this, client software installed in each of the host devices transmits to the backup server the description of the structure of each disk in response to a request from the backup server.
  • control unit From the name of the backup, the control unit establishes a backup plan, containing the list of host disk management units, disk units and disk addresses involved in the backup. The same operation is performed for restoring the data. The data does not pass through the control unit.
  • - bus management means These means manage a permanent dialogue between the host disk units, the tape management units and the status of the current data transfers (active, recovery, waiting), the bit rates, the causes of the waits, etc.
  • means of remote maintenance and remote diagnosis comprising a local network or an asynchronous line associated with a modem.
  • the host disk management unit allows the backup server to connect to a configuration disk management unit and transfer the data to be backed up.
  • the connections to the disks are made through:
  • Fiber Channel a specific high speed fiber optic bus (Fiber Channel).
  • the host disk management unit controls the transfer of data to the backup device using the tape management unit.
  • Host disk management units. are seen by disk management systems as a host in the sense of the operating system of the host equipment.
  • the host disk management unit is responsible for processing data packaging (header and end of block) and sending this data to the management unit of the magnetic media control robot. The data must be kept for the time necessary for them to be taken into account by the robot management unit.
  • the tape management unit manages the backup devices (tape drive [streamers]) and the robot or robots containing them.
  • the tape management unit allows the data to be backed up to be transferred at a maximum speed, taking into account the characteristics of the disks and the bus type of the configuration. Connections to backup devices are made using [SCSI] buses and ESCON (registered trademark), high speed fiber optic (Fiber Channel) channels.
  • the tape management unit receives orders from the control unit allowing robot management: selection of a support, change of support, ...
  • the tape management unit receives commands and data from the host disk management unit. Acknowledgment of receipt of data is sent to the transmitter. During a restore, the tape management unit controls the transfer of data to the host disks using the host disk management unit.

Abstract

The invention concerns an automatic backup and restore system for data derived from a plurality of host equipment in heterogeneous environment, comprising a backup server including at least a buffer hard disc, the backup server being connected to each element of the computer equipment via at least a computer network and to physical backup units consisting of backup management units and tape management units, the backup server being controlled by a supervising programme ensuring communication between the various elements of the system and processing exchanged digital data. The invention is characterised in that the backup server comprises an emulation programme for simulating a backup equipment compatible with the environment of any one of the computer equipment elements to be saved, and for recording an image of part at least of the discs of the host equipment elements and for transforming data exchanged with the various equipment elements into single-format data for exchanges with the backup server.

Description

SYSTEME DE SAUVEGARDE ET DE RESTAURATION AUTOMATIQUE DE DONNEES PROVENANT D'UNE PLURALITE D'EQUIPEMENTS HOTES EN ENVIRONNEMENT HETEROGENEAUTOMATIC DATA BACKUP AND RESTORATION SYSTEM FROM A PLURALITY OF HOST EQUIPMENT IN A HETEROGENEOUS ENVIRONMENT
La présente invention concerne le domaine de la sauvegarde informatique et particulier un système de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène .The present invention relates to the field of computer backup and in particular a system for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment.
On connaît dans l'état de la technique différentes solutions pour réaliser la sauvegarde et de restauration automatique de données à très haut débit, sur des supports physiques de grande capacité. Les solutions de l'art antérieur sont généralement liées à un environnement homogène, par exemple de plate-forme UNIX (marque déposée) utilisées pour gérer des bases de données et les applications qui y sont rattachées . Ces sauvegardes sont utilisées en complément à des protections par redondance de type RAID (marque déposée) . Pour permettre la restauration de données corrompues , on procède, dans 1 ' état de la technique, à des sauvegardes périodiques, généralement pendant les heures creuses, sur des supports physiques tels que des cartouches magnétiques ou des disques . Les débits maximum des différents supports étant différents, il est nécessaire de disposer d'un serveur commandé par un logiciel de gestion pour optimiser le processus de sauvegarde.In the state of the art, various solutions are known for carrying out the backup and automatic restoration of very high speed data, on high capacity physical media. The solutions of the prior art are generally linked to a homogeneous environment, for example of a UNIX (registered trademark) platform used to manage databases and the applications which are attached to them. These backups are used in addition to RAID type redundancy protections (registered trademark). In order to allow the restoration of corrupted data, in the prior art, periodic backups, generally during off-peak hours, are carried out on physical media such as magnetic cartridges or discs. The maximum speeds of the different media being different, it is necessary to have a server controlled by management software to optimize the backup process.
On peut distinguer différentes architectures de sauvegarde. La plus simple est une architecture locale, destinée à la sauvegarde directe et indépendante sur chaque équipement informatique des données sur un ou plusieurs disques ou supports locaux. Cette solution n'est bien sûr pas la plus performante car elle oblige l'acquisition pour chaque équipement d'une unité complète de sauvegarde, et ne permet pas d'optimiser l'utilisation des capacités des supports de sauvegarde. On connaît également des architectures de sauvegarde « client/serveur ».We can distinguish different backup architectures. The simplest is a local architecture, intended for the direct and independent backup on each computer equipment of the data on one or more disks or local supports. This solution is of course not the most efficient because it requires the acquisition of a complete backup unit for each piece of equipment, and does not make it possible to optimize the use of the capacities of the backup media. There are also known “client / server” backup architectures.
Dans ce type d'architecture, la sauvegarde de l'ensemble des machines se fait au travers d'un serveur dédit, via un réseau. Ces architectures utilisent un environnement homogène, notamment UNIX (marque déposée) .In this type of architecture, the backup of all the machines is done through a dedicated server, via a network. These architectures use a homogeneous environment, in particular UNIX (registered trademark).
On connaît également dans l' état de la technique le brevet WO99/66401 décrivant un serveur de données pour la sauvegarde et la restauration de données en environnement hétérogène.Patent WO99 / 66401 describing a data server for backing up and restoring data in a heterogeneous environment is also known in the prior art.
Le but de la présente invention est de proposer un système de sauvegarde de données disques sur un support magnétique, permettant une sauvegarde centralisée et une mutualisation des données en vue d'une optimisation des capacités des supports magnétiques .The aim of the present invention is to propose a system for backing up disk data on a magnetic medium, allowing centralized backup and pooling of data with a view to optimizing the capacities of magnetic media.
A cet effet, l'invention concerne un système de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène, comprenant un serveur de sauvegarde comprenant au moins un disque dur tampon, le serveur de sauvegarde étant relié d'une part à chacun des équipements informatiques par au moins un réseau informatique et d'autre part à des unités de sauvegarde physique constitués par des unités de gestion de disques et par des unités de gestion de bandes, le serveur de sauvegarde étant commandé par un programme superviseur assurant la communication entre les différents éléments du système et le traitement des données numériques échangées, caractérisé en ce que le serveur de sauvegarde comprend un programme d'émulation pour la simulation d'un équipement de sauvegarde compatible avec l'environnement de l'un quelconque des équipements informatiques à sauvegarder, et pour enregistrer une image d'une partie au moins des disques des équipements hôtes et pour transformer les données échangées avec les différents équipements hôtes en données en un format unique pour les échanges avec le serveur de sauvegarde. Le système de sauvegarde selon l'invention permet de sauver automatiquement, en fonction de critères tels que l'heure, la date, des sous-ensembles tels que des « volumes » (au sens de Microsoft ™ [marque déposée] de ce terme) ou de « partitions disque » (au sens de Unix™ [marque déposée] de ce terme) .To this end, the invention relates to a system for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment, comprising a backup server comprising at least one hard disk buffer, the backup server being connected on the one hand to each of the computer equipment by at least one computer network and on the other hand to physical backup units constituted by disk management units and by tape management units, the backup server being controlled by a supervisor program ensuring the communication between the various elements of the system and the processing of the digital data exchanged, characterized in that the backup server comprises an emulation program for the simulation of backup equipment compatible with the environment of the '' any computer equipment to be backed up, and to record an image of a at least part of the disks of the host equipment and to transform the data exchanged with the different host equipment into data in a single format for exchanges with the backup server. The backup system according to the invention makes it possible to automatically save, according to criteria such as the time, the date, subsets such as "volumes" (in the sense of Microsoft ™ [registered trademark] of this term) or "disk partitions" (in the sense of Unix ™ [registered trademark] of this term).
De préférence, le serveur comporte des moyens pour encapsuler les données provenant des équipements hôtes, pour enregistrer provisoirement les données ainsi encapsulées sur des disques tampon, pour regrouper les données enregistrées sur les disques tampon et les transmettre au serveur de sauvegarde.Preferably, the server comprises means for encapsulating the data originating from the host devices, for temporarily recording the data thus encapsulated on buffer disks, for grouping the data recorded on the buffer disks and transmitting them to the backup server.
Selon une variante, le serveur est relié aux équipements extérieurs par une première liaison dédiée à haut débit pour les échanges des données à sauvegarder ou à restaurer, et par une seconde liaison pour les échanges de signaux de commande.According to a variant, the server is connected to the external equipment by a first dedicated high-speed link for the exchange of data to be saved or restored, and by a second link for the exchange of control signals.
L'invention concerne également un procédé de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène comprenant une étape d'activation par un serveurs de la transmission des données à sauvegarder enregistrées sur la mémoire d'un équipement extérieur à un serveur de sauvegarde et d'enregistrement desdites données à sauvegarder sur un support magnétique, caractérisé en ce qu'il comporte une étape de réplication sur une mémoire du serveur de sauvegarde du support physique de la mémoire de chacun des équipements hôtes, et une étape de traitement des données ainsi répliquées pour l'enregistrement sur au moins un support magnétique associé au serveur de sauvegarde.The invention also relates to a method for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment, comprising a step of activation by a server of the transmission of the data to be saved recorded on the memory of a equipment external to a server for saving and recording said data to be saved on a magnetic medium, characterized in that it includes a step of replicating on a memory of the backup server the physical medium of the memory of each of the host equipments, and a step of processing the data thus replicated for recording on at least one magnetic medium associated with the backup server.
Selon un mode de mise en œuvre préféré, l'étape de réplication consiste à enregistrer sur un disque dur du serveur de sauvegarde une copie des volumes ou des partitions disques d'une partie au moins des équipements hôtes .According to a preferred implementation mode, the replication step consists of saving a copy of the volumes or volumes on a hard disk of the backup server. disk partitions of at least part of the host equipment.
Avantageusement, la transmission des données à sauvegarder entre 1 ' équipement extérieur et le disque temporaire est réalisé par une liaison à haut débit, tel que le bus fibre optique (Fibre Channel) .Advantageously, the transmission of the data to be saved between the external equipment and the temporary disk is achieved by a high speed link, such as the fiber optic bus (Fiber Channel).
De préférence, l'étape de réplication consiste suspendre temporairement la fonction « miroir » de la procédure RAID 1 (marque déposée) de l'équipement hôte et à enregistrer sur une mémoire temporaire les données de la partie séparée du miroir du disque de l'équipement hôte, et à reconstituer le miroir après l'achèvement de la réplication des données .Preferably, the replication step consists in temporarily suspending the “mirror” function of the RAID 1 (registered trademark) procedure of the host equipment and in recording on a temporary memory the data of the separate part of the mirror of the disk of the host equipment, and rebuilding the mirror after the completion of data replication.
L'invention sera mieux comprise à la lecture de la description d'un exemple non limitatif de réalisation, où :The invention will be better understood on reading the description of a nonlimiting exemplary embodiment, where:
- la figure 1 représente le schéma de principe d'un système selon l'invention.- Figure 1 shows the block diagram of a system according to the invention.
L'architecture d'un système de sauvegarde et de restauration automatique de données selon l'invention comprend :The architecture of an automatic data backup and restoration system according to the invention comprises:
- une unité de commande (1) gérant l'interface utilisateur et la base de données décrivant la collection de supports magnétiques de sauvegarde. - des unités (2, 3) de gestion disques hôtes qui transfèrent les données des disques hôtes (4 à 7) vers le bus (8) du serveur de sauvegarde et réciproquement.- a control unit (1) managing the user interface and the database describing the collection of magnetic backup media. - host disk management units (2, 3) which transfer the data from the host disks (4 to 7) to the bus (8) of the backup server and vice versa.
- une ou plusieurs unités de gestion bandes (9) qui transfèrent les données des périphériques de stockage vers le bus (8) du serveur de sauvegarde et réciproquement.- one or more tape management units (9) which transfer data from storage devices to the bus (8) of the backup server and vice versa.
L'unité de commande (1) pilote les unités (2, 3) de gestion disques hôtes et les unités de gestion bandes (9) .The control unit (1) controls the host disk management units (2, 3) and the tape management units (9).
Les données des utilisateurs provenant des disques durs des équipements hôtes (4 à 7) sont accédées grâce à un système de gestion des disques . Ce système de gestion possède des fonctions miroir (RAID 1 [marque déposée] ) et de suspension temporaire du miroir, en permettant la connexion d'un hôte sur la partie séparée du miroir. La gestion des modifications (bit-map) pendant la suspension est nécessaire pour permettre la remise en conformité rapide du miroir. Les données utilisateurs sont gérées avec ce système. L'utilisateur continue à travailler sur une branche du miroir. L'autre contient les données à sauvegarder. Une fois les données sauvegardées, le miroir est reconstitué et l'utilisateur retrouve la situation initiale.User data from the hard disks of the host devices (4 to 7) is accessed through a disk management system. This management system has mirror (RAID 1 [registered trademark]) and temporary mirror suspension functions, allowing the connection of a host on the separate part of the mirror. The management of modifications (bit-map) during suspension is necessary to allow the mirror to be quickly brought back into conformity. User data is managed with this system. The user continues to work on a branch of the mirror. The other contains the data to be saved. Once the data has been saved, the mirror is reconstituted and the user finds the initial situation.
Les communications entre les différents éléments du serveur de sauvegarde (disques, robots d'exploitation des supports magnétiques,...) sont assurés par un bus (8) en fibre optique pour les réseaux s ' étendant sur quelques centaines ou milliers de mètres, ou en cuivre pour les réseaux de faible extension géographique (quelques dizaines de mètres) . Les débits du bus sont typiquement de l'ordre de 100 mégaoctets en [half duplex] . Dans le cas où des débits supérieurs sont requis, le système peut intégrer plusieurs bus. Il est également possible une implémentation monomachine, donc sans bus.The communications between the various elements of the backup server (disks, robots for using magnetic media, etc.) are provided by a fiber optic bus (8) for networks extending over a few hundred or thousands of meters, or copper for networks of small geographic extension (a few tens of meters). Bus speeds are typically around 100 megabytes in [half duplex]. In case higher flow rates are required, the system can integrate several buses. It is also possible a single machine implementation, therefore without bus.
L'unité de commande (1) commande les différents éléments du système, à travers un réseau local. Elle comprend :The control unit (1) controls the various elements of the system, through a local network. She understands :
- une base de données contenant les liens entre le nom de sauvegarde, la date, les volumes et supports magnétiques ainsi que l'emplacement de chaque support magnétique dans les robots. La base de données contient aussi la définition de chaque occurrence de sauvegarde, définie par son nom, et ses critères de mise en œuvre (date, heure, circonstances) et de conservation (date et/ou conditions de péremption) . Cette base de données peut éventuellement dédoublée pour des raisons de sécurité. - des moyens de télécommande des machines hôtes . Le serveur de sauvegarde a besoin de connaître la configuration des disques utilisateur, qui est évolutive. Lorsqu'une sauvegarde est demandée, on construit la topologie (localisation des disques physiques, adresse de début et de fin des différents volumes à partir de la demande utilisateur qui est formée par une séquence de noms de volumes. Pour cela, un logiciel client implanté dans chacun des équipements hôtes transmet au serveur de sauvegarde la description de la structure de chaque disque en réponse à une requête du serveur de sauvegarde.- a database containing the links between the backup name, the date, the volumes and magnetic media as well as the location of each magnetic media in the robots. The database also contains the definition of each backup occurrence, defined by its name, and its criteria for implementation (date, time, circumstances) and conservation (date and / or expiration conditions). This database may possibly be split for security reasons. - means of remote control of the host machines. The backup server needs to know the configuration of user disks, which is scalable. When a backup is requested, we build the topology (location of the physical disks, start and end address of the different volumes from the user request which is formed by a sequence of volume names. For this, client software installed in each of the host devices transmits to the backup server the description of the structure of each disk in response to a request from the backup server.
- des moyens de commande des unités de gestion disques hôtes. A partir du nom de la sauvegarde, l'unité de commande établit un plan de sauvegarde, contenant la liste des unités de gestion disques hôtes, des unités disques et des adresses disques impliquées dans la sauvegarde. La même opération est réalisée pour la restauration des données . Les données ne traversent pas l'unité de commande.means for controlling the host disk management units. From the name of the backup, the control unit establishes a backup plan, containing the list of host disk management units, disk units and disk addresses involved in the backup. The same operation is performed for restoring the data. The data does not pass through the control unit.
- des moyens de gestion du bus . Ces moyens gèrent un dialogue permanent entre les unités de disques hôtes, les unités de gestion des bandes et l'état des transferts des données en cours (actif, reprise, en attente), les débits, les causes des attentes, etc. des moyens de télémaintenance et de télédiagnostic comprenant un réseau local ou une ligne asynchrone associée à un modem.- bus management means. These means manage a permanent dialogue between the host disk units, the tape management units and the status of the current data transfers (active, recovery, waiting), the bit rates, the causes of the waits, etc. means of remote maintenance and remote diagnosis comprising a local network or an asynchronous line associated with a modem.
L'unité de gestion disques hôtes permet au serveur de sauvegarde de se connecter à un organe de gestion disque de la configuration et de transférer les données à sauvegarder. Les connexions aux disques se font grâce à :The host disk management unit allows the backup server to connect to a configuration disk management unit and transfer the data to be backed up. The connections to the disks are made through:
- des bus [SCSI] 16 bits- 16-bit [SCSI] buses
- un bus spécifique à haut débit fibre optique ( Fibre Channel) .- a specific high speed fiber optic bus (Fiber Channel).
Lors d'une sauvegarde, l'unité de gestion disques hôtes pilote le transfert des données vers le périphérique de sauvegarde en utilisant l'unité de gestion bandes . Les unités de gestion disques hôtes . sont vues par les systèmes gestion disque comme un hôte au sens du système d'exploitation de l'équipement hôte. L'unité de gestion disques hôtes est chargé d'un traitement assurant l'empaquetage des données (entête et fin de bloc) et d'envoyer ces données à l'unité de gestion du robot de commande des supports magnétiques . Les données doivent être conservées le temps nécessaire à leur prise en compte par l'unité de gestion du robot.During a backup, the host disk management unit controls the transfer of data to the backup device using the tape management unit. Host disk management units. are seen by disk management systems as a host in the sense of the operating system of the host equipment. The host disk management unit is responsible for processing data packaging (header and end of block) and sending this data to the management unit of the magnetic media control robot. The data must be kept for the time necessary for them to be taken into account by the robot management unit.
L'unité de gestion bandes gère les périphériques de sauvegarde (dérouleur de bandes [streamers] ) et le ou les robots les contenant. L'unité de gestion bandes permet de transférer les données à sauvegarder à un débit maximum compte tenu des caractéristiques des disques et du type de bus de la configuration. Les connexions aux périphériques de sauvegarde se font grâce à des bus [SCSI] et des canaux ESCON (marque déposée) , fibre optique (Fibre Channel) à haut débit. L'unité de gestion bandes reçoit de l'unité de commande les ordres permettant la gestion des robots : sélection d'un support, changement de support,...The tape management unit manages the backup devices (tape drive [streamers]) and the robot or robots containing them. The tape management unit allows the data to be backed up to be transferred at a maximum speed, taking into account the characteristics of the disks and the bus type of the configuration. Connections to backup devices are made using [SCSI] buses and ESCON (registered trademark), high speed fiber optic (Fiber Channel) channels. The tape management unit receives orders from the control unit allowing robot management: selection of a support, change of support, ...
Lors d'une sauvegarde, l'unité de gestion bandes reçoit les ordres et les données de l'unité de gestion disques hôtes. L'acquittement de la réception des données est envoyé à l'émetteur. Lors d'une restauration, l'unité de gestion bandes pilote le transfert des données vers les disques hôtes en utilisant l'unité de gestion disques hôtes. During a backup, the tape management unit receives commands and data from the host disk management unit. Acknowledgment of receipt of data is sent to the transmitter. During a restore, the tape management unit controls the transfer of data to the host disks using the host disk management unit.

Claims

REVENDICATIONS
1 - Système de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène, comprenant un serveur de sauvegarde comprenant au moins un disque dur tampon, le serveur de sauvegarde étant relié d'une part à chacun des équipements informatiques par au moins un réseau informatique et d'autre part à des unités de sauvegarde physique constitués par des unités de gestion de disques et par des unités de gestion de bandes, le serveur de sauvegarde étant commandé par un programme superviseur assurant la communication entre les différents éléments du système et le traitement des données numériques échangées, caractérisé en ce que le serveur de sauvegarde comprend un programme d'émulation pour la simulation d'un équipement de sauvegarde compatible avec l'environnement de l'un quelconque des équipements informatiques à sauvegarder, et pour enregistrer une image d'une partie au moins des disques des équipements hôtes et pour transformer les données échangées avec les différents équipements hôtes en données en un format unique pour les échanges avec le serveur de sauvegarde .1 - System for automatically backing up and restoring data from a plurality of host devices in a heterogeneous environment, comprising a backup server comprising at least one hard disk buffer, the backup server being connected on the one hand to each of the IT equipment by at least one computer network and on the other hand to physical backup units constituted by disk management units and by tape management units, the backup server being controlled by a supervisor program ensuring communication between the various elements of the system and the processing of the digital data exchanged, characterized in that the backup server comprises an emulation program for the simulation of backup equipment compatible with the environment of any of the computer equipment to be save, and to save an image of at least part of the disks of Facilities for guests and transform the data exchanged with the different host devices in a single data format for exchange with the backup server.
2 - Système de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène selon la revendication 1 caractérisé en ce que le serveur comporte des moyens pour encapsuler les données provenant des équipements hôtes, pour enregistrer provisoirement les données ainsi encapsulées sur des disques tampon, pour regrouper les données enregistrées sur les disques tampon et les transmettre au serveur de sauvegarde. 3 - Système de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène selon la revendication 1 ou 2 caractérisé en ce que le serveur est relié aux équipements extérieurs par une première liaison dédiée à haut débit pour les échanges des données à sauvegarder ou à restaurer, et par une seconde liaison pour les échanges de signaux de commande.2 - System for automatically backing up and restoring data from a plurality of host equipment in a heterogeneous environment according to claim 1, characterized in that the server comprises means for encapsulating the data coming from the host equipment, for temporarily recording the data thus encapsulated on buffer disks, to gather the data recorded on the buffer disks and transmit them to the backup server. 3 - System for automatically backing up and restoring data from a plurality of host equipment in a heterogeneous environment according to claim 1 or 2, characterized in that the server is connected to the external equipment by a first dedicated high-speed link for the exchange of data to be saved or restored, and by a second link for the exchange of control signals.
4 - Procédé de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène comprenant une étape d'activation par un serveurs de la transmission des données à sauvegarder enregistrées sur la mémoire d'un équipement extérieur à un serveur de sauvegarde et d'enregistrement desdites données à sauvegarder sur un support magnétique, caractérisé en ce qu'il comporte une étape de réplication sur une mémoire du serveur de sauvegarde du support physique de la mémoire de chacun des équipements hôtes, et une étape de traitement des données ainsi répliquées pour l'enregistrement sur au moins un support magnétique associé au serveur de sauvegarde.4 - Method for automatically backing up and restoring data from a plurality of host equipment in a heterogeneous environment comprising a step of activation by a server of the transmission of the data to be saved recorded on the memory of an equipment external to a server for saving and recording said data to be backed up on a magnetic medium, characterized in that it comprises a step of replication on a memory of the server for backing up the physical medium of the memory of each of the host devices, and a step of processing of the data thus replicated for recording on at least one magnetic medium associated with the backup server.
5 - Procédé de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène selon la revendication 4 caractérisé en ce que l'étape de réplication consiste à enregistrer sur un disque dur du serveur de sauvegarde une copie des volumes ou des partitions disques d'une partie au moins des équipements hôtes.5 - Method for automatically backing up and restoring data from a plurality of host equipment in a heterogeneous environment according to claim 4 characterized in that the replication step consists of recording on a hard disk of the backup server a copy of the volumes or disk partitions of at least part of the host equipment.
6 - Procédé de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène selon la revendication 4 ou 5 caractérisé en ce que la transmission des données à sauvegarder entre l'équipement extérieur et le disque temporaire est réalisé par une liaison à haut débit, tel que le bus fibre optique (Fibre Channel) .6 - Method for automatic backup and restoration of data from a plurality of host equipment in a heterogeneous environment according to claim 4 or 5 characterized in that the transmission data to be saved between the external equipment and the temporary disk is produced by a high speed link, such as the fiber optic bus (Fiber Channel).
7 - Procédé de sauvegarde et de restauration automatique de données provenant d'une pluralité d'équipements hôtes en environnement hétérogène selon l'une quelconque des revendications 4 à 6 caractérisé en ce que l'étape de réplication consiste suspendre temporairement la fonction « miroir » de la procédure RAID 1 (marque déposée) de l'équipement hôte et à enregistrer sur une mémoire temporaire les données de la partie séparée du miroir du disque de l'équipement hôte, et à reconstituer le miroir après 1 'achèvement de la réplication des données . 7 - Method for automatically backing up and restoring data from a plurality of host equipment in a heterogeneous environment according to any one of claims 4 to 6 characterized in that the replication step consists in temporarily suspending the "mirror" function of the procedure RAID 1 (registered trademark) of the host equipment and to save on a temporary memory the data of the separated part of the mirror of the disk of the host equipment, and to reconstitute the mirror after the completion of the replication of the data.
PCT/FR2001/001324 2000-04-28 2001-04-27 Backup and restore system for data derived from a plurality of host equipment in heterogeneous environment WO2001084265A2 (en)

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JP2001580623A JP2003532219A (en) 2000-04-28 2001-04-27 Automatic backup and restoration system for data from multiple host devices in heterogeneous operating environments
EP01929756A EP1285320A2 (en) 2000-04-28 2001-04-27 Backup and restore system for data derived from a plurality of host equipment in heterogeneous environment
AU2001256442A AU2001256442A1 (en) 2000-04-28 2001-04-27 Backup and restore system for data derived from a plurality of host equipment inheterogeneous environment

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FR0005527A FR2808349A1 (en) 2000-04-28 2000-04-28 AUTOMATIC DATA BACKUP AND RESTORATION SYSTEM FROM A PLURALITY OF HOST EQUIPMENT IN A HETEROGENEOUS ENVIRONMENT
FR00/05527 2000-04-28

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AU2001256442A1 (en) 2001-11-12
FR2808349A1 (en) 2001-11-02

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