WO2002012993A1 - Systeme de stockage virtuel - Google Patents
Systeme de stockage virtuel Download PDFInfo
- Publication number
- WO2002012993A1 WO2002012993A1 PCT/FR2001/002420 FR0102420W WO0212993A1 WO 2002012993 A1 WO2002012993 A1 WO 2002012993A1 FR 0102420 W FR0102420 W FR 0102420W WO 0212993 A1 WO0212993 A1 WO 0212993A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- backup
- equipment
- cartridge
- computer
- Prior art date
Links
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
- G06F11/1456—Hardware arrangements for backup
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0604—Improving or facilitating administration, e.g. storage management
- G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0662—Virtualisation aspects
- G06F3/0664—Virtualisation aspects at device level, e.g. emulation of a storage device or system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0683—Plurality of storage devices
- G06F3/0686—Libraries, e.g. tape libraries, jukebox
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0866—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
Definitions
- the present invention relates to the field of storage of computer data on media such as large capacity cassettes, by remote equipment generally comprising a cassette handling robot.
- PCT patent W09844423 describes a computer network comprising a number of storage control units, each being coupled to a plurality of storage assemblies, which assemblies comprise at least one large-capacity memory device ( MSD).
- Each storage control unit can be coupled to at least one host processing system and at least one other storage control unit to control access of the host processing systems to the mass storage devices. Multiple copies of data are stored in geographically remote storage sets, so that any host can access any copy.
- Each storage controller comprises an interface with a host which emulates a large capacity memory device independent of the type of storage device and an interface with a local storage assembly which emulates a host independent of the type of host. Hosts access stored data using virtual training.
- Storage control units provide automatic backups and error corrections as well as write protection for backup copies.
- US 5,809,511 describes a data transfer system between a host station and additional equipment comprising a cache memory and a robotic equipment for managing recording media.
- the object of the invention is to propose an improved backup system allowing the use by a heterogeneous fleet of host computers, connected to non-specific common backup equipment.
- the invention relates, in its most general sense, to a system for saving data from a host computer [mainframe], characterized in that it comprises computer equipment comprising an input-output interface for the data exchange with the host computer, said interface comprising a backup reader-writer emulator, at least one hard disk and a tape reader-writer, the equipment further comprising a processor for transferring between the interface of input / output or tape drive and tape player / recorder, the system further comprising a supervisor comprising a memory for recording information relating to tape recordings of the computer equipment, and for controlling said computer equipment in based on instructions from the host computer.
- the emulator consists of a computer for analyzing the signals from the host computer and for generating a response corresponding to the type of simulated cassette player - recorder.
- the invention also relates to a method for backing up data from a host computer.
- mainframe characterized in that the input-output interface of a backup device is emulated so that a backup device exhibits, for a host machine, behavior identical to a tape drive, said device backup comprising an intermediate storage means different from a tape drive.
- the system described below allows the backup of data from a heterogeneous fleet of host machines (1) of the "Mainframe” type connected to a computer network (2) of the SCSI type.
- the backup equipment (3) includes one or more tape drives (4) or "streamer" for backing up data on magnetic media.
- the backup equipment (3) is connected to the network by means of an emulated input-output interface circuit (5) so that the backup equipment (3) is seen by the host machine in the form of a backup drive. of the emulated type, and this for all the functions fulfilled by the backup equipment (3).
- the emulated interface emulates the main known tape drives in order to allow a transparent dialogue between the host machine and the backup equipment (3).
- the backup equipment (3) also comprises at least one intermediate storage device (9) composed in the example described by RAID hard disks.
- the backup equipment comprises for each of the initiators' backup media (6, 7).
- a computer controls the various resources to ensure the transfer of data from the input-output interface (5) to the intermediate storage device (9) and vice versa, as well as the transfer of data from the intermediate storage device (9) to the tape unwinders (4) and vice versa.
- the backup equipment according to the invention meets the following specifications:
- the data saved on the disk partition is copied to tape, reproducing the initial writing mechanism, by using the model. It ensures the persistence and consistency of the data.
- the backup equipment guarantees the persistence and consistency of the data on tape and partition. In addition, it allows to decorrelate the type of upstream unwinder (the one we emulate), from the downstream (the one we actually pilot).
- the backup equipment manages a drive of one model and backs up the data on a drive of another model.
- the backup equipment (3) provides the following types of connections:
- the backup equipment manages several upstream and downstream connections simultaneously. As a result, it performs several transfers in parallel. Each transfer is managed by a transfer unit.
- a transfer unit manages three types of links: - link with a host system link with a partition on a physical disk link with the tape drive.
- the system further comprises a supervisor station (12) connected by serial links (13, 14) on the one hand to the host machine and on the other hand to the backup equipment.
- Emulation consists of simulating the SCSI operation of a tape drive vis-à-vis a host machine and managing the SCSI responses to different requests from the host and the record transfers.
- the supervision station (12) controls a database in which the identification labels of the saved data are recorded.
- the volumes of data written by the host machines are first created in a buffer disk space (9). These volumes have a maximum size fixed at the time of the configuration of the backup system, generally quite small, of the order of 250
- a volume of maximum size 250 MB can for example contain only 10 MB of data. In this case, only these 10 MB are transferred to tape, so as to optimize the band space.
- the backup equipment manages internally, thanks to a database, the list of known volumes, by storing a certain amount of information, such as: the name of the volume - the medium on which it is stored (disk, cartridge ) the position on the support (disk partition number, or logical start and end addresses on cartridge) - etc.
- This information is essential to be able to find a volume.
- Basic information When transferring data from the disk cache to cartridges, private information, called " Basic information ". This information is only written on cartridges, and is ignored in reverse transfers, in the case where a volume is transferred from a cartridge to the disk cache, for example for restoration by the host machine. They are therefore fully managed internally and transparent to host machines.
- positionStartVolume logical address on the cartridge for the start of the volume.
- endVol ume position logical address on the cartridge at the end of the volume.
- eVol ume size approximate size of the volume in KB.
- channel reader number of the reader (defined in the HBS configuration) used to transfer the volume from the disk cache__ to the cartridge. See eDisk: disk number (defined in the HBS configuration) in which the volume was located when it was transferred to the cartridge. 5 - party on Disk: number of the disk partition in which the volume was located before it was transferred to the cartridge.
- processorNumber processor number used to transfer the cache volume
- barcode barcode of the cartridge containing the volume.
- cartridgeName name of the cartridge, as declared under HBS. This name is
- cartridgeType hexadecimal code indicating the type of cartridge.
- the possible values are:
- OxOlFOOOOOL mask for number of the archive pool or mirror to which the cartridge belongs
- the code used for the cartridgeType field can possibly be a combination of the previous values.
- size used total size of data stored on the cartridge, in Mega Bytes.
- tai ll eCartouche maximum capacity of the cartridge, in Mega Bytes.
- cptLoading cartridge loading counter. Indicates the number of times the cartridge has been loaded into a drive.
- volName ume name of the volume, as known to the host machine.
- é ta t Vol'um-e - -.- hexadecimal code indicating the volume status. This code is a combination of indicators whose access masks and possible values are as follows:
- OxOOOOOOOlL 1 if the volume is valid, 0 if invalid (old version or logically erased volume)
- OxOOOOOOIOL 1 if the volume has a mirror copy on another cartridge - Ox00000020L 1 if a copy of this volume must be made on a mirror cartridge
- da t eEcri t ure date of last writing or modification of the volume by the host machine, in the form yyyy-mm-dd hour Scripting: time of last writing or modification of the volume by the host machine, in the form hh: mm: ss da teReading: date of last access in volume reading by the host machine, in the form yyyy-mm-dd hourReading: time of last access in volume reading by the host machine, in the form hh: mm: ss da teDump : date of transfer of the volume from the disk cache to the cartridge, in the form dd-mm-yyyy hour Emptying: time of transfer of the volume from the disk cache to the cartridge, in the form hh: mm: ss
- the basic information is cumulative, for speed up cartridge analysis for reconstruction
- a strip contains volumes VI, V2, V3, V4 and V5.
- the basic information associated with each of these volumes is called B1, B2, B3, B4 and B5.
- B1 The basic information associated with volume VI.
- B2 contains in a single data record an accumulation of B1 and information concerning the volume V2.
- B2 therefore contains the information of VI and V2.
- the basic information B3 contains in a single data record a combination of B2 and information about volume V3. B3 therefore contains the information of VI, V2 and V3.
- the last basic information of the cartridge, B5 in the previous example therefore contains a total of all the information concerning all the volumes present on the cartridge.
- the accumulated basic information can reach a large size.
- a maximum size has been arbitrarily set at 132 KB.
- the equipment (3) assigns to this volume reduced basic information, containing only basic information for this new volume, without aggregating information from previous volumes.
- the standard mechanism for accumulating information from the current volume with that from the previous volume is used.
- the complete reconstruction of the database can be carried out using this basic information.
- a feature integrated into the processor code allows you to analyze a cartridge to extract the latest basic information. This analysis can also be carried out by external software: you just have to position yourself at the end of the tape, go back one record and read the last data record.
- the basic information thus retrieved at the end of the cartridge contains a description of the volumes of the cartridge. As described in the previous paragraph, if the field address eVol ume of the first volume contains a value different from 0, this means that the first volume is not at the beginning of the tape. It must be inferred that this is reduced basic information.
- the same volume (same name, same host system) can be present on several different cartridges, or in several places on the same cartridge. This can happen for the following reasons: either it is several different versions of the same volume which has been updated several times by the host machine or it is the same data which has been moved by HBS internally. In all cases, the analysis of the basic information DateEcri ture and timeEcri ture of all occurrences of this volume makes it possible to determine which is the most recent, and
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Library & Information Science (AREA)
- Quality & Reliability (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Memory System Of A Hierarchy Structure (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60126950T DE60126950T2 (de) | 2000-08-04 | 2001-07-24 | Virtuelles speichersystem |
AU2001279906A AU2001279906A1 (en) | 2000-08-04 | 2001-07-24 | Virtual storage system |
EP01958174A EP1305705B8 (fr) | 2000-08-04 | 2001-07-24 | Systeme de stockage virtuel |
JP2002517612A JP2004506259A (ja) | 2000-08-04 | 2001-07-24 | 仮想記憶システム |
US10/343,893 US7660954B2 (en) | 2000-08-04 | 2001-07-24 | Techniques for saving data |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/10353 | 2000-08-04 | ||
FR0010353A FR2812736B1 (fr) | 2000-08-04 | 2000-08-04 | Systeme de stockage virtuel |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002012993A1 true WO2002012993A1 (fr) | 2002-02-14 |
Family
ID=8853335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/002420 WO2002012993A1 (fr) | 2000-08-04 | 2001-07-24 | Systeme de stockage virtuel |
Country Status (8)
Country | Link |
---|---|
US (1) | US7660954B2 (fr) |
EP (1) | EP1305705B8 (fr) |
JP (1) | JP2004506259A (fr) |
AT (1) | ATE355555T1 (fr) |
AU (1) | AU2001279906A1 (fr) |
DE (1) | DE60126950T2 (fr) |
FR (1) | FR2812736B1 (fr) |
WO (1) | WO2002012993A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1524601A2 (fr) | 2003-10-08 | 2005-04-20 | Hewlett-Packard Development Company, L.P. | Procédé de stockage de données sur une mémoire secondaire |
GB2380596B (en) * | 2001-07-07 | 2005-07-27 | Hewlett Packard Co | Data backup |
US7572618B2 (en) | 2006-06-30 | 2009-08-11 | Bristol-Myers Squibb Company | Polynucleotides encoding novel PCSK9 variants |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030110265A1 (en) * | 2001-12-07 | 2003-06-12 | Inrange Technologies Inc. | Method and apparatus for providing a virtual shared device |
US9167869B2 (en) * | 2007-04-07 | 2015-10-27 | Dynasty Footwear, Ltd. | Shoe with multi-component embedded strap |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5809511A (en) * | 1997-01-02 | 1998-09-15 | International Business Machines Corporation | Outboard data migration in a volume stacking library |
WO1998044423A1 (fr) * | 1997-03-31 | 1998-10-08 | Ark Research Corporation | Unite de commande de stockage de donnees permettant l'acces de plusieurs hotes a plusieurs systemes de stockage |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US4467421A (en) * | 1979-10-18 | 1984-08-21 | Storage Technology Corporation | Virtual storage system and method |
US4918588A (en) * | 1986-12-31 | 1990-04-17 | Wang Laboratories, Inc. | Office automation system with integrated image management |
JPH0432940A (ja) * | 1990-05-23 | 1992-02-04 | Toshiba Corp | 分散データベース・システム |
EP0509637A3 (en) * | 1991-03-15 | 1993-06-02 | Fujitsu Limited | Magnetic tape storage apparatus |
EP0681721B1 (fr) * | 1993-02-01 | 2005-03-23 | Sun Microsystems, Inc. | Systeme de fichiers d'archivage pour serveurs de donnees dans un environnement informatique reparti |
US5666531A (en) * | 1995-04-07 | 1997-09-09 | Optima Technology Corp. | Recordable CDROM accessing system |
US5748874A (en) * | 1995-06-05 | 1998-05-05 | Mti Technology Corporation | Reserved cylinder for SCSI device write back cache |
US5907672A (en) * | 1995-10-04 | 1999-05-25 | Stac, Inc. | System for backing up computer disk volumes with error remapping of flawed memory addresses |
US6043948A (en) * | 1995-11-08 | 2000-03-28 | Sony Corporation | Information recording and reproducing apparatus |
JPH09160727A (ja) * | 1995-12-08 | 1997-06-20 | Fujitsu Ltd | 情報記憶装置、及び、ライブラリ装置 |
US5805864A (en) * | 1996-09-10 | 1998-09-08 | International Business Machines Corporation | Virtual integrated cartridge loader for virtual tape storage system |
US6496791B1 (en) * | 1997-07-09 | 2002-12-17 | Neville Yates | Interfaces for an open systems server providing tape drive emulation |
US6711343B1 (en) * | 1997-07-17 | 2004-03-23 | Matsushita Electric Industrial Co., Ltd. | Data recording/reproducing device, file managing method, file information generating method, file managing method, management information generating device, management information analyzing device, and medium |
US6023709A (en) * | 1997-12-15 | 2000-02-08 | International Business Machines Corporation | Automated file error classification and correction in a hierarchical storage management system |
US6226728B1 (en) * | 1998-04-21 | 2001-05-01 | Intel Corporation | Dynamic allocation for efficient management of variable sized data within a nonvolatile memory |
JP3618552B2 (ja) * | 1998-06-30 | 2005-02-09 | 富士通株式会社 | 記憶装置 |
US6285518B1 (en) * | 1998-08-26 | 2001-09-04 | Exabyte Corporation | Life/wear monitoring for magnetic tape |
US6385706B1 (en) * | 1998-12-31 | 2002-05-07 | Emx Corporation | Apparatus and methods for copying a logical object to a primary storage device using a map of storage locations |
-
2000
- 2000-08-04 FR FR0010353A patent/FR2812736B1/fr not_active Expired - Fee Related
-
2001
- 2001-07-24 DE DE60126950T patent/DE60126950T2/de not_active Expired - Fee Related
- 2001-07-24 JP JP2002517612A patent/JP2004506259A/ja active Pending
- 2001-07-24 US US10/343,893 patent/US7660954B2/en not_active Expired - Fee Related
- 2001-07-24 AT AT01958174T patent/ATE355555T1/de not_active IP Right Cessation
- 2001-07-24 WO PCT/FR2001/002420 patent/WO2002012993A1/fr active IP Right Grant
- 2001-07-24 AU AU2001279906A patent/AU2001279906A1/en not_active Abandoned
- 2001-07-24 EP EP01958174A patent/EP1305705B8/fr not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5809511A (en) * | 1997-01-02 | 1998-09-15 | International Business Machines Corporation | Outboard data migration in a volume stacking library |
WO1998044423A1 (fr) * | 1997-03-31 | 1998-10-08 | Ark Research Corporation | Unite de commande de stockage de donnees permettant l'acces de plusieurs hotes a plusieurs systemes de stockage |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2380596B (en) * | 2001-07-07 | 2005-07-27 | Hewlett Packard Co | Data backup |
US6954834B2 (en) | 2001-07-07 | 2005-10-11 | Hewlett-Packard Development Company, L.P. | Data backup including tape and non-volatile memory units and method of operating same |
EP1524601A2 (fr) | 2003-10-08 | 2005-04-20 | Hewlett-Packard Development Company, L.P. | Procédé de stockage de données sur une mémoire secondaire |
EP1524601A3 (fr) * | 2003-10-08 | 2011-06-01 | Hewlett-Packard Development Company, L.P. | Procédé de stockage de données sur une mémoire secondaire |
US7572618B2 (en) | 2006-06-30 | 2009-08-11 | Bristol-Myers Squibb Company | Polynucleotides encoding novel PCSK9 variants |
US7846706B2 (en) | 2006-06-30 | 2010-12-07 | Bristol-Myers Squibb Company | PCSK9 polypeptides |
US8105804B2 (en) | 2006-06-30 | 2012-01-31 | Bristol-Myers Squibb Company | Polynucleotides encoding novel PCSK9 variants |
US8354264B2 (en) | 2006-06-30 | 2013-01-15 | Bristol-Myers Squibb Company | Polynucleotides encoding novel PCSK9 variants |
Also Published As
Publication number | Publication date |
---|---|
EP1305705B1 (fr) | 2007-02-28 |
US7660954B2 (en) | 2010-02-09 |
JP2004506259A (ja) | 2004-02-26 |
ATE355555T1 (de) | 2006-03-15 |
AU2001279906A1 (en) | 2002-02-18 |
EP1305705A1 (fr) | 2003-05-02 |
DE60126950D1 (de) | 2007-04-12 |
EP1305705B8 (fr) | 2007-04-18 |
DE60126950T2 (de) | 2007-10-31 |
FR2812736A1 (fr) | 2002-02-08 |
FR2812736B1 (fr) | 2003-12-19 |
US20060190680A1 (en) | 2006-08-24 |
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