WO2011069977A2 - Chargement de données efficace dans une mémoire d'un système informatique - Google Patents
Chargement de données efficace dans une mémoire d'un système informatique Download PDFInfo
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- WO2011069977A2 WO2011069977A2 PCT/EP2010/069002 EP2010069002W WO2011069977A2 WO 2011069977 A2 WO2011069977 A2 WO 2011069977A2 EP 2010069002 W EP2010069002 W EP 2010069002W WO 2011069977 A2 WO2011069977 A2 WO 2011069977A2
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- Prior art keywords
- data chunk
- memory
- data
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
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- 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
- G06F3/0667—Virtualisation aspects at data level, e.g. file, record or object virtualisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45579—I/O management, e.g. providing access to device drivers or storage
Definitions
- the disclosed subject matter relates generally to computing systems and, more particularly, to efficient loading of data into memory of a computing system hosting a plurality of virtual machines.
- a host software i.e., a hypervisor
- software or hardware infrastructures i.e., a host machine
- a hypervisor may implement one or more virtual machines (VMs).
- VMs virtual machines
- the hypervisor implements the VMs by loading data utilized to implement the VMs (i.e., images of the VMs) from a data storage system into a memory of the host machine. If the images are derived from the same image (i.e., a master image), the images may have a significant amount of data in common. In existing implementations, the hypervisor retrieves and loads each of the images independently into a separate region of the memory without identifying the data that is common to the multiple VM images. Thus, the hypervisor wastes resources (e.g., processing power, memory space, storage and network bandwidth) by repeatedly retrieving and loading the common data.
- resources e.g., processing power, memory space, storage and network bandwidth
- US published patent application 20090182928 discloses a method and system for tracking of movement of a VM using an identifier.
- US published patent application US20080263296 discloses a method and system for determining whether an information block is already stored in a storage unit.
- US patent 7500048 discloses a method and system for determining whether a hash match exists between a first candidate memory page and a second candidate memory page.
- US patent 7356665 discloses a method and system for maintaining a reverse mapping structure that maps machine memory blocks within said processing system to physical memory blocks used within each virtual machine.
- US patent 7246200 discloses a method for checking if an image associated with a virtual machine is stored in a storage based on map information. None of these prior art documents address problem of resource waste by the need to repeatedly retrieve and load common data.
- a method for deploying one or more virtual machines on a host computing system comprises receiving mapping information from a data storage system.
- the mapping information associates a first data chunk stored in the data storage system with a unique identifier to support deployment of a first virtual machine on a host computing system.
- the mapping information is utilized to determine whether any copies of the first data chunk have already been loaded into a memory of the host computing system in association with deployment of the first virtual machine or a second virtual machine on the host computing system. If no copies of the first data chunk have already been loaded into the memory, the first data chunk is retrieved from the data storage system, loaded into the memory, and utilized to deploy the first virtual machine on the host computing system.
- a system comprising one or more logic units.
- the one or more logic units are configured to perform the functions and operations associated with the above-disclosed methods.
- a computer program product comprising a computer readable storage medium having a computer readable program is provided. The computer readable program when executed on a computer causes the computer to perform the functions and operations associated with the above-disclosed methods.
- FIG. 1 illustrates an exemplary virtualization environment, in accordance with one or more embodiments.
- FIGS. 2A and 2B are flow diagrams of a method for retrieving and loading one or more VM images into memory, in accordance with one embodiment.
- FIGS. 3 and 4 are block diagrams of hardware and software environments in which a system of the present invention may operate, in accordance with one or more embodiments.
- the virtualization environment 100 comprises a data storage system 110 and a host machine 120.
- the data storage system 110 includes one or more storage devices 112 for storing data and a storage controller 114 for managing data.
- the host machine 120 includes a memory 122 for storing data, a memory controller 124 for managing data, and a hypervisor 126 for implementing one or more VMs 130.
- data utilized to implement the VMs 130 may be retrieved from the storage devices 112 and loaded into the memory 122.
- the storage controller 114 stored the VM images in the storage devices 112 according to a storage scheme that uses copy-on- write, de-duplication, or other space-efficient storage mechanism to prevent or eliminate multiple copies of commonly shared data from being stored in the data storage system 110 (P200).
- the VM images may have a significant amount of data in common if the VM images are derived from a master image.
- a VM image may be derived from a master image by generating a space-efficient point-in-time copy (e.g., a snapshot) of the master image and then modifying the copy.
- Each data chunk stored in the data storage system 110 may be advantageously associated with a unique identifier (P210).
- a data chunk refers to a data block, a data extent, or other grouping of data.
- a unique identifier associated with a data chunk may be generated according to the storage location, according to the content of the data chunk, or other mechanism for generating such an identifier.
- copies of a data chunk that are stored in the same storage location or have the same content may be associated with the same unique identifier.
- one or more copies of the data chunk may be stored in a first or second storage volume depending on whether the data chunk has been modified after a certain point in time.
- a unique identifier for an unmodified copy of the data chunk may comprise an identifier for the first storage volume and the location of the copy within the first storage volume, for example.
- a unique identifier for a modified copy of the data chunk may comprise an identifier for a second storage volume and the location of the copy within the second storage volume, for example.
- a unique identifier for a data chunk may comprise the physical address of the data chunk, for example.
- a unique identifier for a data chunk may comprise a hash value or other value generated from the content of the data chunk, for example.
- the storage controller 114 provides hypervisor 126 with information (i.e., mapping information) associating each data chunk of the VM images with a unique identifier (P220).
- mapping information may be obtained by the hypervisor 126 either by the hypervisor 126 sending an explicit request to the storage controller 114 for such information or by being piggybacked on other traffic that is flowing from the storage controller 114 to the hypervisor 126, or any other available means for obtaining such information. It should be understood that the disclosed subject matter is not limited to a specific implementation.
- the hypervisor 126 For each data chunk of a VM image that is to be retrieved from the data storage system 110 and loaded into the memory 122, the hypervisor 126 utilizes the unique identifier associated with the data chunk to determine whether a copy of the data chunk has already been retrieved and loaded into the memory 122 as part of deploying a first VM image (i.e., the current VM image) or second VM image (i.e., a previous deployed VM image) (P230). If a copy of the data chunk has already been retrieved and loaded into the memory 122, a second copy of the same data chunk will not be retrieved and loaded into the memory 122 for the purpose of deploying the first VM image.
- a first VM image i.e., the current VM image
- second VM image i.e., a previous deployed VM image
- the first VM image shares the copy of the data chunk that has already been loaded into the memory 122 (P240).
- the hypervisor 126 requests the memory controller 124 to perform a memory-to-memory copy of the data chunk instead of retrieving the data chunk again from the data storage system 110.
- the hypervisor 126 retrieves the data chunk from the data storage system 110 and provides the data chunk to the memory controller 124 (P250). Upon receiving the data chunk, the memory controller 124 loads the data chunk into the memory 122 using a space-efficient memory scheme that prevents or eliminates multiple copies of the commonly shared data from being stored in the memory 122 (P260). Once the data chunk is loaded into the memory 122, the hypervisor 126 updates a data structure (e.g., a table, an array, a bitmap, etc.) to indicate that the data chunk has been loaded into the memory 122 (P270).
- a data structure e.g., a table, an array, a bitmap, etc.
- a VM may be modified due to a change in the state of the VM. If so, a data chunk for a first VM that is commonly shared between the first VM and the second VM may be modified after being loaded into the memory 122. In such
- the hypervisor 124 may update the unique identifier associated with the data chunk loaded into the memory 122 to include a timestamp or version number, for example, to distinguish the data chunk as being associated with the first VM and not the second VM. In this scenario, if the second VM has been already deployed, then a copy of the data chunk prior to the modification is reserved and loaded in association with the second VM. Alternatively, the hypervisor 120 may prohibit the data chunk from being modified while the data chunk is in use.
- the processes provided above prevent copies of the same data that are stored in different storage volumes of a data storage system from being retrieved from storage and loaded into memory more than once. Thus, data is retrieved and loaded into memory without wasting processing power (e.g., input/output (I/O) operations), memory space, or storage and network bandwidth. Also, the processes provided above may be applied to any type of data that may be loaded from a set of storage volumes into memory of any type of computing system. Therefore, the scope of the claimed subject matter should not be construed as being limited to loading VM images into memory of a computing system hosting VMs.
- the disclosed subject matter may be implemented as a
- computing systems and program software disclosed herein may comprise a controlled computing environment that may be presented in terms of hardware components or logic code executed to perform methods and processes that achieve the results contemplated herein. Said methods and processes, when performed by a general purpose computing system or machine, convert the general purpose machine to a specific purpose machine.
- a computing system environment in accordance with an exemplary embodiment may be composed of a hardware environment 1110 and a software environment 1120.
- the hardware environment 1110 may comprise logic units, circuits or other machinery and equipments that provide an execution environment for the components of software environment 1120.
- the software environment 1120 may provide the execution instructions, including the underlying operational settings and configurations, for the various components of hardware environment 1110.
- hardware environment 110 may comprise a processor 1101 coupled to one or more storage elements by way of a system bus 1100.
- the storage elements may comprise local memory 1102, storage media 1106, cache memory 1104 or other computer-usable or computer readable media.
- a computer usable or computer readable storage medium may include any recordable article that may be utilized to contain, store, communicate, propagate or transport program code.
- a computer readable storage medium may be an electronic, magnetic, optical,
- a computer readable storage medium may also be implemented in a propagation medium, without limitation, to the extent that such implementation is deemed statutory subject matter.
- Examples of a computer readable storage medium may include a semiconductor or solid- state memory, magnetic tape, a removable computer diskette, a random access memory (RAM), a read-only memory (ROM), a rigid magnetic disk, an optical disk, or a carrier wave, where appropriate.
- Current examples of optical disks include compact disk, read only memory (CD-ROM), compact disk read/write (CD-R/W), digital video disk (DVD), high definition video disk (HD-DVD) or Blue-rayTM disk.
- processor 1101 loads executable code from storage media 1106 to local memory 1102.
- Cache memory 1104 optimizes processing time by providing temporary storage that helps reduce the number of times code is loaded for execution.
- One or more user interface devices 1105 e.g., keyboard, pointing device, etc.
- a display screen 1107 may be coupled to the other elements in the hardware environment 1110 either directly or through an intervening I/O controller 1103, for example.
- a communication interface unit 1108, such as a network adapter, may be provided to enable the hardware environment 1110 to communicate with local or remotely located computing systems, printers and storage devices via intervening private or public networks (e.g., the Internet). Wired or wireless modems and Ethernet cards are a few of the exemplary types of network adapters.
- hardware environment 1110 may not include some or all the above components, or may comprise additional components to provide supplemental functionality or utility.
- hardware environment 1110 may be a desktop or a laptop computer, or other computing device optionally embodied in an embedded system such as a set-top box, a personal digital assistant (PDA), a personal media player, a mobile communication unit (e.g., a wireless phone), or other similar hardware platforms that have information processing or data storage capabilities.
- PDA personal digital assistant
- mobile communication unit e.g., a wireless phone
- communication interface 1108 acts as a data communication port to provide means of communication with one or more computing systems by sending and receiving digital, electrical, electromagnetic or optical signals that carry analog or digital data streams representing various types of information, including program code.
- the communication may be established by way of a local or a remote network, or alternatively by way of transmission over the air or other medium, including without limitation
- software environment 1120 may be generally divided into two classes comprising system software 1121 and application software 1122 as executed on one or more hardware environments 1110.
- the methods and processes disclosed here may be implemented as system software 1121, application software 1122, or a combination thereof.
- System software 1121 may comprise control programs, such as an operating system (OS) or an information management system, that instruct one or more processors 1101 (e.g., microcontrollers) in the hardware environment 1110 on how to function and process information.
- Application software 1122 may comprise but is not limited to program code, data structures, firmware, resident software, microcode or any other form of information or routine that may be read, analyzed or executed by a processor 1101.
- application software 1122 may be implemented as program code embedded in a computer program product in form of a computer-usable or computer readable storage medium that provides program code for use by, or in connection with, a computer or any instruction execution system.
- application software 1122 may comprise one or more computer programs that are executed on top of system software 1121 after being loaded from storage media 1106 into local memory 1102.
- application software 1122 may comprise client software and server software.
- client software may be executed on a client computing system that is distinct and separable from a server computing system on which server software is executed.
- Software environment 1120 may also comprise browser software 1126 for accessing data available over local or remote computing networks. Further, software environment 1120 may comprise a user interface 1124 (e.g., a graphical user interface (GUI)) for receiving user commands and data.
- GUI graphical user interface
- logic code within the context of this disclosure is not related or limited to any particular programming language, and may comprise one or more modules that may be executed on one or more processors in distributed, non-distributed, single or multiprocessing
- a software embodiment may include firmware, resident software, micro-code, etc.
- Certain components including software or hardware or combining software and hardware aspects may generally be referred to herein as a "circuit," “module” or “system.”
- the subject matter disclosed may be implemented as a computer program product embodied in one or more computer readable storage medium(s) having computer readable program code embodied thereon. Any combination of one or more computer readable storage medium(s) may be utilized.
- the computer readable storage medium may be a computer readable signal medium or a computer readable storage medium.
- a computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
- a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
- a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof.
- a computer readable signal medium may be any computer readable storage medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
- Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
- Computer program code for carrying out the disclosed operations may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C"
- the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
- the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
- These computer program instructions may also be stored in a computer readable storage medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable storage medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
- the computer program instructions may also be loaded onto a computer, other
- each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures.
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
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Abstract
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2012542499A JP5689475B2 (ja) | 2009-12-13 | 2010-12-06 | ホスト・コンピューティング・システム上に1つまたは複数の仮想計算機を配備するための方法、コンピューティング・システムのメモリに1組のデータをロードするための方法、システム、およびコンピュータ・プログラム(コンピューティング・システムのメモリへのデータの効率的なロード) |
GB1202745.4A GB2488639B (en) | 2009-12-13 | 2010-12-06 | Efficient loading of data into memory of a computing system |
DE112010004784T DE112010004784T5 (de) | 2009-12-13 | 2010-12-06 | Effizientes Laden von Daten in den Speicher eines Rechnersystems |
CN201080056304.XA CN102652308B (zh) | 2009-12-13 | 2010-12-06 | 将数据高效地载入计算系统的存储器中的方法和系统 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US12/636,743 US8489799B2 (en) | 2009-12-13 | 2009-12-13 | Efficient loading of data into memory of a computing system |
US12/636,743 | 2009-12-13 |
Publications (2)
Publication Number | Publication Date |
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WO2011069977A2 true WO2011069977A2 (fr) | 2011-06-16 |
WO2011069977A3 WO2011069977A3 (fr) | 2011-08-11 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2010/069002 WO2011069977A2 (fr) | 2009-12-13 | 2010-12-06 | Chargement de données efficace dans une mémoire d'un système informatique |
Country Status (7)
Country | Link |
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US (2) | US8489799B2 (fr) |
JP (1) | JP5689475B2 (fr) |
CN (1) | CN102652308B (fr) |
DE (1) | DE112010004784T5 (fr) |
GB (1) | GB2488639B (fr) |
TW (1) | TWI439939B (fr) |
WO (1) | WO2011069977A2 (fr) |
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2010
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- 2010-12-06 DE DE112010004784T patent/DE112010004784T5/de not_active Ceased
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2012
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US8738884B2 (en) | 2014-05-27 |
JP5689475B2 (ja) | 2015-03-25 |
US20130246723A1 (en) | 2013-09-19 |
TW201135595A (en) | 2011-10-16 |
GB201202745D0 (en) | 2012-04-04 |
GB2488639A (en) | 2012-09-05 |
US20110145534A1 (en) | 2011-06-16 |
JP2013513841A (ja) | 2013-04-22 |
GB2488639B (en) | 2015-07-22 |
WO2011069977A3 (fr) | 2011-08-11 |
DE112010004784T5 (de) | 2012-11-08 |
TWI439939B (zh) | 2014-06-01 |
CN102652308A (zh) | 2012-08-29 |
CN102652308B (zh) | 2014-12-03 |
US8489799B2 (en) | 2013-07-16 |
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