WO2016101856A1 - Procédé et appareil d'accès à des données - Google Patents

Procédé et appareil d'accès à des données Download PDF

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Publication number
WO2016101856A1
WO2016101856A1 PCT/CN2015/098105 CN2015098105W WO2016101856A1 WO 2016101856 A1 WO2016101856 A1 WO 2016101856A1 CN 2015098105 W CN2015098105 W CN 2015098105W WO 2016101856 A1 WO2016101856 A1 WO 2016101856A1
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Prior art keywords
lun
host
information
storage device
allocation request
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PCT/CN2015/098105
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English (en)
Chinese (zh)
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高蒙
王燊
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华为技术有限公司
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus

Definitions

  • the embodiments of the present invention relate to the field of computer technologies, and in particular, to a data access method and apparatus.
  • the mapping between the host and the logical unit number (LUN) of the storage device is one of the key operations in the storage configuration.
  • the purpose is to mount the storage resources of an enterprise storage device to the host, so that the host can use the host. Storage resources provided by enterprise storage devices. After a LUN of a storage device is mapped to a host, it must be scanned by the host to be recognized and used by the operating system device of the host.
  • a proxy is used in the prior art to establish an agent between the host and the enterprise storage device.
  • the agent belongs to the internal elements of the enterprise storage device.
  • the LUN of the storage device is associated with the agent, not the host. That is, the mapping relationship between the agent and the LUN on the storage device is established.
  • the host can only see the proxy, but the LUN of the storage device is not visible.
  • the host sends an input/output (IO) request to the LUN of the storage device. The request is sent to the proxy first.
  • the LUN of the storage device and when the mount relationship between the LUN of the storage device and the agent changes, the agent needs to notify the host.
  • the protocol related parts such as the resolution of the LUN (IDentity, ID for short), the discovery of the LUN, and the in-band management of other LUNs need to be corresponding. change. This change not only adds extra workload to the storage device, but also increases the complexity of IO processing and affects IO performance.
  • the embodiment of the invention provides a data access method and device, which can be applied to a large-scale cluster network, which simplifies the process of the host discovering the LUN, and does not need to change the existing storage protocol, and does not affect the IO performance.
  • an embodiment of the present invention provides a data access method, which is applied to a storage system, where the storage system includes a host and a storage device, and the host includes an application module and an interface module, and the method includes:
  • the interface module acquires a logical unit number LUN allocation request sent by the application module, and sends the LUN allocation request to the storage device; the LUN allocation request is used to instruct the storage device to allocate a LUN for the host And establishing a mapping relationship between the identifier of the LUN and the host;
  • the interface module receives the mapping relationship and the LUN information sent by the storage device, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate that the host is configured according to the Mapping the relationship and the information of the LUN, and accessing a storage space corresponding to the identifier of the LUN on the storage device.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host is used Establishing a data link between the host and the storage device, and the interface module of the host sends the LUN allocation request to the storage device by using the data link.
  • an embodiment of the present invention provides a data access method, which is applied to a storage system, where the storage system includes a host and a storage device, and the storage device includes a storage management interface module, and the method includes:
  • the storage management interface module receives a logical unit number LUN allocation request sent by the host, allocates a LUN to the host according to the LUN allocation request, and establishes a mapping relationship between the identifier of the LUN and the host;
  • the storage management interface module sends the information about the mapping relationship and the LUN to the host, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate that the host is configured according to the The mapping relationship and the information of the LUN access the storage space corresponding to the identifier of the LUN on the storage device.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host is used Establishing a data link between the host and the storage device, where the storage device receives the LUN allocation request sent by the host through the data link.
  • an embodiment of the present invention provides a host, including an application module and an interface module.
  • the application module is configured to send a LUN allocation request to the interface module, where the interface module is configured to obtain the LUN allocation request sent by the application module, and send the LUN allocation request a storage device; the LUN allocation request is used to instruct the storage device to allocate a LUN to the host, and establish a mapping relationship between the identifier of the LUN and the host;
  • the interface module is further configured to receive the mapping relationship and the LUN information sent by the storage device, where the information about the LUN includes an identifier of the LUN, and the information about the LUN is used to indicate the The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information of the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host is configured Establishing a data link between the host and the storage device, and the interface module of the host sends the LUN allocation request to the storage device by using the data link.
  • an embodiment of the present invention provides a storage device, including:
  • a storage management interface module configured to receive a logical unit number LUN allocation request sent by the host, allocate a LUN to the host according to the LUN allocation request, and establish a mapping relationship between the identifier of the LUN and the host;
  • the storage management interface module is further configured to send the mapping relationship and the information about the LUN to the host, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate the location
  • the host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information of the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host is used Establishing a data link between the host and the storage device, where the storage device receives the LUN allocation request sent by the host through the data link.
  • the data access method and device of the embodiment of the present invention obtains a logical unit number LUN allocation request sent by the application module, and sends the LUN allocation request to the storage device; the LUN allocation request is used to indicate the storage.
  • the device allocates a LUN to the host, and establishes a mapping relationship between the identifier of the LUN and the host; the interface module receives the mapping relationship and the information about the LUN sent by the storage device;
  • the information about the LUN includes the identifier of the LUN, and the information about the LUN is used to indicate that the host accesses the identifier of the LUN according to the mapping relationship and the information of the LUN.
  • the storage space can be applied to a large-scale cluster network to dynamically allocate storage resources.
  • the host does not need to scan the LUNs, which simplifies the process of discovering LUNs by the host and does not need to change existing storage protocols and does not affect IO performance.
  • FIG. 1 is a system architecture diagram 1 of an embodiment of a data access method according to the present invention.
  • Embodiment 1 of a data access method according to the present invention is a flowchart of Embodiment 1 of a data access method according to the present invention
  • FIG. 3 is a system architecture diagram 2 of an embodiment of a data access method according to the present invention.
  • FIG. 4 is a system architecture diagram 3 of an embodiment of a data access method according to the present invention.
  • FIG. 5 is a flowchart of Embodiment 2 of a data access method according to the present invention.
  • Embodiment 1 of a host according to the present invention is a schematic structural diagram of Embodiment 1 of a host according to the present invention.
  • FIG. 7 is a schematic structural diagram of Embodiment 1 of a storage device according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 2 of a host according to the present invention.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a storage device according to the present invention.
  • FIG. 1 is a system architecture diagram of an embodiment of a data access method according to the present invention.
  • the embodiment of the present invention is applied to a storage system.
  • the storage system includes a host and a storage device, and may also include a cluster management center.
  • the storage system in FIG. 1 includes a host 210, a host 220, and a host 230.
  • the host bus Adapter (HBA) is connected to the enterprise storage device 240, and the cluster management center 250 can manage the host.
  • HBA host bus Adapter
  • FIG. 2 is a flowchart of a first embodiment of a data access method according to an embodiment of the present invention.
  • FIG. 3 is a system architecture diagram of an embodiment of a data access method according to the present invention.
  • FIG. 2 the method in this embodiment is applied to a storage system, where the storage system includes a host and a storage device, and the host includes an application module and an interface module, and the method includes:
  • Step 201 The interface module acquires a logical unit number LUN allocation request sent by the application module, and sends the LUN allocation request to the storage device.
  • the LUN allocation request is used to indicate that the storage device is the
  • the host allocates a LUN and establishes a mapping relationship between the identifier of the LUN and the host.
  • Step 202 The interface module receives the mapping relationship and the LUN information sent by the storage device, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate the host The storage space corresponding to the identifier of the LUN on the storage device is accessed according to the mapping relationship and the information about the LUN.
  • the host manages the mapping relationship between the host and the LUN of the storage device through the interface module.
  • the driver layer of the host does not need to scan the HBA, but the information about the LUN through the interface module.
  • the identification of the LUN, etc. is passed to the application in the application module.
  • the application running on each host can access the storage space corresponding to the identifier of the LUN on the storage device through the information of the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the LUN allocation request is a space allocation command sent from the application program of the application module, and mainly includes a storage space size and a storage space type (such as thin configuration and completion). Full configuration), performance requirements, reliability requirements, etc. It is necessary to determine what is specifically included according to the specific specifications of the storage device.
  • the LUN allocation request When the LUN allocation request is sent to the storage device, it needs to be converted into a management request recognizable by the storage device, and the management request is a storage configuration command and a management command that can be understood from the perspective of the storage device.
  • Enterprise storage devices provide a programmable management interface accessible by external applications within the storage device, such as the storage management interface module shown in Figure 3. Data center administrators can write applications to flexibly configure and manage storage devices based on interface specifications.
  • the application module of the application module in the host 210 uses the storage space in the storage device 240 to send a LUN allocation request to the interface module, and the interface module converts the LUN allocation request into a management request of the storage device.
  • the information is sent to the storage device 240.
  • the storage device 240 allocates the LUN corresponding to the LUN allocation request, such as LUN 1, and establishes a mapping relationship between the LUN 1 and the host 210, and returns the mapping relationship and the information of the LUN 1 to the interface module. .
  • the interface module obtains the information of the LUN 1 and returns the information to the application module.
  • the application module of the application module uses the information of the LUN 1 to access the storage space corresponding to the LUN 1.
  • the interface module includes an application adaptation unit 300 and a storage adaptation unit 310, where the interface module obtains a logical unit number LUN allocation request, including:
  • the application adaptation unit acquires the LUN allocation request, and forwards the LUN allocation request to the storage adaptation unit;
  • the sending the LUN allocation request to the storage device includes:
  • the storage adaptation unit converts the LUN allocation request into a management request of the storage device, and sends the request to the storage device;
  • the storage adaptation unit receives the mapping relationship and the information about the LUN, and sends the mapping relationship and the information about the LUN to the application adaptation unit, where the application adaptation unit sends the information to the application module. .
  • the application module of the application module in the host 210 uses the storage space in the storage device 240, and sends a LUN allocation request to the interface module application adaptation unit, and the application adaptation unit uses the LUN.
  • the allocation request is forwarded to the storage adaptation unit, and the storage adaptation unit converts the LUN allocation request into a management request of the storage device, and sends the LUN to the storage device 240, and the storage device 240 allocates the LUN corresponding to the LUN allocation request, such as a LUN. 1.
  • the mapping relationship between the LUN 1 and the host 210 is established, and the mapping relationship and the information of the LUN 1 are returned to the storage adaptation unit of the interface module, and forwarded to the application adaptation unit.
  • the application adapting unit returns the obtained information of the LUN 1 to the application of the application module, and the application of the application module accesses the storage space corresponding to the LUN 1 by using the information of the LUN 1.
  • the information about the LUN further includes: port information of the host, where the host establishes a data link between the host and the storage device, and the interface module of the host passes the data link. Sending the LUN allocation request to the storage device.
  • the port information of the host is used by the host to establish a data link between the host and the storage. After obtaining the information about the LUN, the host needs to configure the LUN on the correct host port to send IO requests.
  • the LUN allocation request sent by the application module is obtained by the interface module, and the LUN allocation request is sent to the storage device;
  • the LUN allocation request is used to indicate that the storage device is allocated to the host a LUN, and establishing a mapping relationship between the identifier of the LUN and the host;
  • the interface module receives the mapping relationship and the information about the LUN sent by the storage device, where the information about the LUN includes the LUN
  • the information of the LUN is used to indicate that the host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information about the LUN, and can be applied to a large-scale cluster.
  • the storage resources are dynamically allocated. The host does not need to scan the LUNs. This simplifies the process of discovering LUNs by the host and does not need to change the existing storage protocols.
  • FIG. 5 is a flowchart of Embodiment 2 of a data access method according to the present invention. As shown in FIG. 5, the method in this embodiment is applied to a storage system, where the storage system includes a host and a storage device, and the storage device includes a storage management interface module, and the method includes:
  • Step 501 The storage management interface module receives a logical unit number LUN allocation request sent by the host, allocates a LUN to the host according to the LUN allocation request, and establishes a mapping relationship between the identifier of the LUN and the host.
  • Step 502 The storage management interface module sends the mapping relationship and the information about the LUN to the host, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate the The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping information of the LUN.
  • the application module of the application module in the host 210 uses the storage space in the storage device 240, and sends a LUN allocation request to the interface module of the host, and the interface module of the host allocates the LUN.
  • the storage management interface module of the storage device 240 is allocated to the storage management interface module of the storage device 240.
  • the storage management interface module of the storage device 240 allocates a LUN corresponding to the LUN allocation request, such as LUN 1, and establishes LUN 1 and host 210.
  • the interface module of the host obtains the information of the LUN 1 and returns the information to the application module of the application module.
  • the application module of the application module uses the information of the LUN 1 to access the storage space corresponding to the LUN 1.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the LUN allocation request is a space allocation command sent from the application program of the application module, and mainly includes a storage space size, a storage space type (such as thin configuration, full configuration), performance requirements, and reliability requirements. It is necessary to determine what is specifically included according to the specific specifications of the storage device.
  • the LUN allocation request When the LUN allocation request is sent to the storage device, it needs to be converted into a management request recognizable by the storage device, and the management request is a storage configuration command and a management command that can be understood from the perspective of the storage device.
  • Enterprise storage devices provide a programmable management interface accessible by external applications within the storage device, such as the storage management interface module shown in Figure 3. Data center administrators can write applications to flexibly configure and manage storage devices based on interface specifications.
  • the information about the LUN further includes: port information of the host, where The host establishes a data link between the host and the storage device, and the storage device receives the LUN allocation request sent by the host through the data link.
  • the storage management interface module receives the logical unit number LUN allocation request sent by the host, allocates a LUN to the host according to the LUN allocation request, and establishes a mapping relationship between the identifier of the LUN and the host.
  • the storage management interface module sends the information about the mapping relationship and the LUN to the host, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate that the host is configured according to the
  • the mapping relationship and the information about the LUN access the storage space corresponding to the identifier of the LUN on the storage device, and can be applied to a large-scale cluster network, dynamically allocate storage resources, and the host does not need to scan the LUN, thereby simplifying the host. Discover the process of the LUN without changing the existing storage protocol and without affecting IO performance.
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a host according to the present invention. As shown in Figure 6, the host of this embodiment includes an application module 601 and an interface module 602;
  • the application module 601 is configured to send a logical unit number LUN allocation request to the interface module 602.
  • the interface module 602 is configured to obtain the LUN allocation request sent by the application module 601, and the The LUN allocation request is sent to the storage device; the LUN allocation request is used to instruct the storage device to allocate a LUN to the host, and establish a mapping relationship between the identifier of the LUN and the host;
  • the interface module 602 is further configured to receive the mapping relationship and the LUN information sent by the storage device, where the information about the LUN includes an identifier of the LUN, and the information about the LUN is used to indicate The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information about the LUN.
  • the interface module 602 includes an application adaptation unit and a storage adaptation unit, where the application adaptation unit is configured to acquire the LUN allocation request, and forward the LUN allocation request to the storage adaptation. unit;
  • the storage adaptation unit is configured to convert the LUN allocation request into a management request of the storage device, and send the request to the storage device.
  • the storage adaptation unit is further configured to receive the mapping relationship and the LUN Sending the mapping relationship and the information about the LUN to the application adaptation unit, and sending the information to the application module by the application adaptation unit.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host establishes a data link between the host and the storage device, and the interface module of the host passes the data link. Sending the LUN allocation request to the storage device.
  • the host of the embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of Embodiment 1 of a storage device according to the present invention. As shown in FIG. 7, the storage device of this embodiment includes:
  • the storage management interface module 701 is configured to receive a logical unit number LUN allocation request sent by the host, allocate a LUN to the host according to the LUN allocation request, and establish a mapping relationship between the identifier of the LUN and the host.
  • the storage management interface module 701 is further configured to send the information about the mapping relationship and the LUN to the host, where the information about the LUN includes an identifier of the LUN, and the information about the LUN is used to indicate The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information about the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host establishes a data link between the host and the storage device, and the storage device receives the data by using the host The LUN allocation request sent by the link.
  • the storage device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of Embodiment 2 of a host according to the present invention.
  • the host of this embodiment includes a communication interface 801, a processor 802, and a memory 803; the processor is respectively connected to the communication interface and the memory; and the memory is used to store the number. According to or information;
  • the communication interface 801 is configured to acquire the LUN allocation request sent by the processor 802, and send the LUN allocation request to the storage device; the LUN allocation request is used to indicate that the storage device is The host allocates a LUN, and establishes a mapping relationship between the identifier of the LUN and the host.
  • the communication interface 801 is further configured to receive the mapping relationship and the information about the LUN that are sent by the storage device, where the information about the LUN includes an identifier of the LUN, and the information about the LUN is used to indicate The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information about the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the processor establishes a data link between the host and the storage device, and the communication interface of the host passes the data link.
  • the road sends the LUN allocation request to the storage device.
  • the host of the embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a storage device according to the present invention.
  • the storage device of this embodiment includes: a communication interface 901, a processor 902, and a memory 903; the processor 902 is respectively connected to the communication interface 901 and the memory 903; the memory 903, Used to store data or information;
  • the communication interface 901 is configured to receive a logical unit number LUN allocation request sent by the host, where the processor 902 is configured to allocate a LUN to the host according to the LUN allocation request, and establish an identifier of the LUN and the The mapping relationship of the host;
  • the communication interface 901 is further configured to send the information about the mapping relationship and the LUN to the host, where the information of the LUN includes an identifier of the LUN, and the information of the LUN is used to indicate the The host accesses the storage space corresponding to the identifier of the LUN on the storage device according to the mapping relationship and the information about the LUN.
  • the LUN allocation request includes at least one of the following information: a storage space size, a storage space type, a performance requirement, and a reliability requirement.
  • the information about the LUN further includes: port information of the host, where the host establishes a data link between the host and the storage device, and the storage device receives the data by using the host The LUN allocation request sent by the link.
  • the storage device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit or module is only a logical function division.
  • there may be another division manner for example, multiple units or modules may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or otherwise.
  • the modules described as separate components may or may not be physically separated.
  • the components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

La présente invention concerne un procédé et un appareil d'accès à des données. Le procédé d'accès à des données consiste à : acquérir, par un module d'interface, une demande d'attribution de numéro d'unité logique LUN envoyée par un module d'application et envoyer la demande d'attribution de LUN à un dispositif de mémoire ; la demande d'attribution de LUN étant utilisée pour ordonner au dispositif de mémoire d'attribuer un LUN à un hôte et pour établir une relation de mise en correspondance d'une identification du LUN et de l'hôte (201) ; recevoir, par le module d'interface, la relation de mise en correspondance et des informations du LUN envoyées par le dispositif de mémoire, les informations du LUN comprenant l'identification du LUN ; les informations du LUN étant utilisées pour ordonner à l'hôte d'accéder à un espace mémoire du dispositif de mémoire correspondant à l'identification du LUN conformément à la relation de mise en correspondance et aux informations du LUN (202). Le procédé est applicable dans un réseau en grappe à grande échelle, simplifie la procédure de l'hôte en ce qui concerne la découverte du LUN et ne nécessite pas de modifier le protocole de mémorisation existant, et n'a pas d'influence sur les performances d'E/S.
PCT/CN2015/098105 2014-12-26 2015-12-21 Procédé et appareil d'accès à des données WO2016101856A1 (fr)

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CN107506283B (zh) * 2017-08-25 2021-06-29 郑州云海信息技术有限公司 一种主机向san存储推送信息的方法和系统
CN109597565B (zh) * 2017-09-30 2024-04-05 北京忆恒创源科技股份有限公司 虚拟Plane管理
CN109992536A (zh) * 2018-01-03 2019-07-09 华为技术有限公司 数据处理方法、固态硬盘以及计算机设备
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