WO2016206198A1 - Système de stockage - Google Patents

Système de stockage Download PDF

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Publication number
WO2016206198A1
WO2016206198A1 PCT/CN2015/090005 CN2015090005W WO2016206198A1 WO 2016206198 A1 WO2016206198 A1 WO 2016206198A1 CN 2015090005 W CN2015090005 W CN 2015090005W WO 2016206198 A1 WO2016206198 A1 WO 2016206198A1
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WO
WIPO (PCT)
Prior art keywords
pcie
disk
resource node
computing resource
storage
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PCT/CN2015/090005
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English (en)
Chinese (zh)
Inventor
丁瑞全
陈国峰
张家军
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北京百度网讯科技有限公司
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Publication of WO2016206198A1 publication Critical patent/WO2016206198A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details

Definitions

  • the present invention relates to the field of storage technologies, and in particular, to a storage system.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • a storage system includes: a computing resource node, a storage resource node, and a PCIe network; wherein the computing resource node and the storage resource node are physically separated and respectively connected to the On the PCIe network, and the PCIe network is physically separated from the computing resource node and the storage resource node, and the computing resource node, the storage resource node, and the PCIe network are both expanded.
  • the storage system provided by the embodiment of the present invention by physically separating the computing resource node and the storage resource node, are interconnected through independently set PCIe networks, and the components are extensible, which can improve flexibility; directly through the PCIe network
  • the storage resource node is allocated to the computing resource node, which can improve the access speed of the storage resource and reduce the this.
  • FIG. 1 is a schematic structural diagram of a storage system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a PCIe network in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another PCIe network in the embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a storage system according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of resource allocation in an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another resource allocation in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another resource allocation in an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another resource allocation in an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of another resource allocation in an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another resource allocation in an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a storage system according to an embodiment of the present invention, where the storage system includes:
  • PCIe is an abbreviation for PCI-express
  • PCI is a Peripheral Component Interconnect (PCI).
  • the computing resource node 11 and the storage resource node 12 are physically separated and respectively connected to the PCIe network 13, and the PCIe network and the computing resource node and the storage resource node are Physically separate settings, and the computing resource node, the storage resource node and the PCIe network are all extensible.
  • the number of computing resource nodes may be one or more, and the number of storage resource nodes may be one or more.
  • the computing resource node may specifically be a PCIe Host (PCIe Host).
  • the central processing unit In the traditional local storage scheme, the central processing unit (CPU) will usually be used. Hard Disk Drive (HDD) and Solid State Disk (SSD) are concentrated in a single physical chassis, and they cannot flexibly expand and change to meet different application requirements.
  • HDD Hard Disk Drive
  • SSD Solid State Disk
  • the two are interconnected through the PCIe network. Since the computing resource node and the storage resource node, the PCIe network are independent and scalable, the flexibility can be improved.
  • the front-end interface is usually an IP SAN or an FC SAN.
  • the export bandwidth is limited, and the high performance of the SSD cannot be fully utilized.
  • IP SAN networks have higher latency and FC SANs have higher costs.
  • the storage resource node is directly allocated to the computing resource node through the PCIe network, and there is no additional storage protocol conversion overhead in the middle, and the interconnect bandwidth is very high, which can reduce the network delay, thereby realizing high-speed access of the storage resource, and cut costs.
  • direct exposure of storage resources to computing resources makes it easier to integrate with existing distributed storage systems.
  • the computing resource node can flexibly use the storage resource node according to its own needs, and utilize the storage resource more efficiently. For example, some storage resources are used as primary storage resources, and some SSDs are used as caches, and cache policies can be defined according to their own needs to truly implement a software-defined storage system.
  • the PCIe network includes:
  • the first level PCIe switch includes: at least one PCIe switch chip and one management module.
  • the PCIe network further includes:
  • At least one other level PCIe switch includes: at least one PCIe switch chip;
  • the other level PCIe switch is connected to the management module.
  • the PCIe switch chip in the other-stage PCIe switch is connected to the PCIe switch chip in the first-stage PCIe switch, and/or the PCIe switch chips in different other-stage PCIe switches are connected to each other.
  • the PCIe network may be composed of one or more PCIe switches connected according to a certain topological relationship.
  • a first-stage PCIe switch may be referred to as a PCIe TOR, and a PCIe TOR may include multiple PCIe switch chips (represented by PCIeX) and a management module (represented by a Mgmt CPU).
  • PCIeX has PCIe switching capability, which can exchange data transmitted between computing resource nodes and storage resource nodes.
  • Mgmt CPU is responsible for configuration management of PCIe network.
  • a PCIe network may further include a multi-level PCIe switch.
  • a multi-level PCIe switch scenario there is only one Mgmt CPU in the PCIe network.
  • the Mgmt CPU can be connected to PCIe switch chips in different levels of PCIe switches.
  • the PCIe network is constructed by using one or more PCIe switches, which may be different according to services. The need to flexibly build different PCIe networks.
  • the storage resource node includes:
  • a disk having an interface including at least one of the following: Serial Attached SCSI (SAS), Serial Advanced Technology Attachment (SATA), PCIe; wherein SCSI is a small computer system Interface (Small Computer System Interface).
  • SAS Serial Attached SCSI
  • SATA Serial Advanced Technology Attachment
  • PCIe PCIe
  • the storage controller has one end connected to the PCIe network and the other end connected to the disk.
  • the form of the disk may be a hard disk drive (HDD) or a solid state disk (SSD). Therefore, the disk may include: SAS HDD, SAS SSD, SATA HDD, SATA SSD.
  • the form of the disk is specifically SSD, so the disk can also be a PCIe SSD.
  • the storage controllers can be different depending on the interface of the disk.
  • the storage controller is a Host Bus Adapter (HBA) or a Redundant Array of Independent Disks (RAID) card.
  • HBA Host Bus Adapter
  • RAID Redundant Array of Independent Disks
  • the storage controller's uplink port (the port connected to the PCIe network) is a PCIe port
  • the downlink port includes SAS and/or SATA ports, which can support both SAS and SATA interfaces
  • the storage controller is a PCIe switch chip.
  • the uplink port of the storage controller is a PCIe port
  • the downlink port is also a PCIe port.
  • the uplink interface of the storage controller is a PCIe port
  • the downlink port includes at least one of a PCIe port, a SAS port, and a SATA port, when the three types are included at the same time.
  • the port can support both the disk of the SAS interface and the disk of the SATA interface and the disk of the PCIe port.
  • the storage controller included in the storage system may be one or more types.
  • the storage system includes: a storage controller including a PCIe port, a SAS port, and a SATA port, or
  • the storage system includes: a storage controller that includes a SAS port and/or a SATA port, and a storage controller that is a PCIe port.
  • the SAS/SATA interface (the interface may also be referred to as a port) and the PCIe interface are taken as an example.
  • the storage resource node may be divided into a SAS/SATA interface resource node and a PCIe interface resource node.
  • the SAS/SATA interface resource node and the PCIe interface resource node can exist simultaneously under the same PCIe network to support hybrid storage.
  • the SAS/SATA interface resource node includes: an HBA or a RAID card (HBA/RAID). As a storage controller, one end is connected to the PCIe network, and the other end is connected to the disk.
  • the disk may include at least one of the following items; SAS HDD, SAS SSD, SATA HDD, SATA SSD.
  • HDD is mainly used for high-capacity storage applications to reduce storage costs.
  • SSD is mainly used for IOPS type with certain requirements. Application to improve performance.
  • the PCIe interface resource node includes: a PCIe switch, which is a storage controller, one end is connected to the PCIe network, and the other end is connected to the disk, and the disk includes: PCIe SSD.
  • PCIe SSD with extremely high IOPS, can significantly improve the business performance of IOPS applications, such as databases.
  • the disks of the SAS, SATA, and PCIe interfaces can be supported under the same PCIe network, and the storage medium of the disk can be Including HDD and SSD (for example, support for HDD and SSD in SAS or SATA interface, SSD support in PCIe interface), therefore, under the same PCIe network, SAS HDD, SAS SSD, SATA HDD, SATA SSD, PCIe SSD can Any combination of hybrid storage systems to support high-capacity storage applications to reduce costs, high-bandwidth, high-IOPS applications to improve business performance, and even support high-capacity, low-cost, high-bandwidth, and high IOPS Demand.
  • HDD and SSD for example, support for HDD and SSD in SAS or SATA interface, SSD support in PCIe interface
  • the PCIe network is further configured to:
  • the PCIe network includes a management module (Mgmt CPU), when the disk of the storage resource node is a PCIe SSD, and the PCIe SSD is allocated to a computing resource node in a physical disk format, and a single physical disk is allocated to When a single computing resource node is used, the management module is used to:
  • the PCIe network includes a management module (Mgmt CPU), when the disk of the storage resource node is a PCIe SSD, and the PCIe SSD is allocated to a computing resource node in a logical disk form, and a single logical disk is allocated to a single computing
  • the resource node, the PCIe SSD includes a PCIe SSD controller supporting SR-IOV function.
  • the PCIe SSD controller is configured to generate a VF, and divide the PCIe SSD into one or more logical blocks, and establish a mapping relationship between the logical block and the VF, where different VFs correspond to different logical blocks. ;
  • the management module is configured to configure a correspondence between each computing resource node and each VF.
  • the PCIe network includes a management module (Mgmt CPU), when the disk of the storage resource node is a PCIe SSD, and the PCIe SSD is allocated to a computing resource node in a logical disk format, and a single logical disk is simultaneously allocated to multiple
  • the PCIe SSD includes a PCIe SSD controller supporting SR-IOV function when different computing resource nodes are used.
  • the PCIe SSD controller is configured to generate a VF, and divide the PCIe SSD into one or more logical blocks, and establish a mapping relationship between the logical block and the VF, where at least one logical block corresponds to multiple VFs. ;
  • the management module is configured to configure a correspondence between each computing resource node and each VF.
  • the PCIe network includes a management module (Mgmt CPU), and the disk of the storage resource node is a disk of a SAS or SATA interface, and the disk of the SAS or SATA interface is allocated to a computing resource node in a physical disk format, and a single When the physical disk is allocated to a single computing resource node, the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • Mgmt CPU management module
  • the disk of the storage resource node is a disk of a SAS or SATA interface
  • the disk of the SAS or SATA interface is allocated to a computing resource node in a physical disk format, and a single
  • the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • the HBA or the RAID controller is configured to generate a VF, and establish a mapping relationship between the disk of the SAS or SATA interface with a granularity of the physical disk and the VF, where different VFs correspond to different physical disks;
  • the management module is configured to configure a correspondence between each computing resource node and each VF.
  • the PCIe network includes a management module (Mgmt CPU), and the disk of the storage resource node is a disk of a SAS or SATA interface, and the disk of the SAS or SATA interface is allocated to a computing resource node in a logical disk format, and a single When the logical disk is allocated to a single computing resource node, the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • Mgmt CPU management module
  • the disk of the storage resource node is a disk of a SAS or SATA interface
  • the disk of the SAS or SATA interface is allocated to a computing resource node in a logical disk format, and a single
  • the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • the HBA or RAID controller is configured to generate a VF, and divide the disk of the SAS or SATA interface into one or more logical blocks, and establish a mapping relationship between the logical block and the VF, where different VFs are used. Corresponding to different logic blocks;
  • the management module is configured to configure a correspondence between each computing resource node and each VF.
  • the PCIe network includes a management module (Mgmt CPU), and the disk of the storage resource node is a disk of a SAS or SATA interface, and the disk of the SAS or SATA interface is allocated to a computing resource node in a logical disk format, and a single When the logical disk is simultaneously allocated to a plurality of different computing resource nodes, the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • Mgmt CPU management module
  • the disk of the storage resource node is a disk of a SAS or SATA interface
  • the disk of the SAS or SATA interface is allocated to a computing resource node in a logical disk format, and a single
  • the storage resource node further includes an HBA or a RAID controller supporting the SR-IOV function.
  • the HBA or RAID controller is configured to generate a VF, and divide the disk of the SAS or SATA interface into one or more logical blocks, and establish a mapping relationship between the logical block and the VF, where at least one logic The block corresponds to multiple VFs;
  • the management module is configured to configure a correspondence between each computing resource node and each VF.
  • a PCIe SSD can be supported as a physical disk to be allocated to a computing resource node (such as a PCIe host) on demand.
  • a computing resource node such as a PCIe host
  • any PCIe SSD is a separate PCIe device.
  • the Mgmt CPU is responsible for the scanning and discovery of PCIe devices and PCIe hosts in the PCIe network, and configures the routing table of the PCIe network to statically or dynamically allocate specific PCIe devices to specific PCIe hosts according to the requirements of the PCIe host.
  • PCIe SSDs there are four PCIe SSDs in the PCIe network.
  • the PCIe is SSD A is assigned to computing resource node A
  • PCIe SSD B, PCIe SSD C, and PCIe SSD D are assigned to computing resource node B.
  • the complex PCIe physical network can be simplified into a logical PCIe Bridge, and the computing resource node can only see the PCIe Bridge, thus shielding the influence of the physical topology change on the computing resource node.
  • a PCIe SSD can be supported to be allocated to a computing resource node as needed in a logical disk format.
  • a PCIe SSD can be divided into multiple logical blocks, and then the logical blocks are allocated to different computing resource nodes, so that the management and allocation of resources can be performed with a smaller granularity to improve resource utilization.
  • the physical disk PCIe SSD A is divided into examples, and the logical blocks after the splitting are referred to as SSD block A, SSD block B and SSD block C.
  • a physical presence controller (PCIe SSD Controller) is provided in each PCIe SSD. When the controller supports single root I/O virtualization (SR-IOV), it can be logically formed. Multiple Virtual Functions (VF), each VF is a separate PCIe device in the PCIe network.
  • SR-IOV single root I/O virtualization
  • VF Virtual Functions
  • the PCIe SSD Controller can map logical blocks to different VFs. For example, referring to Figure 6, SSD block A is mapped to VF-1, and SSD block B and SSD block C are mapped to VF-2.
  • the Mgmt CPU is responsible for allocating different VFs to different computing resource nodes (the same VF cannot be assigned to multiple computing resource nodes). For example, referring to Figure 6, assigning VF-1 to computing resource node A, assigning VF-2 Give computing resource Node B. Therefore, the computing resource node A can access the SSD block A, and the computing resource node B can access the SSD block B and the SSD block C, so that the PCIe SSD is allocated to the computing resource node in a logical disk form as needed.
  • multiple computing resource nodes can be simultaneously accessed to access the same PCIe SSD logic block.
  • the PCIe SSD Controller can map the same SSD logic block to different VFs, and the Mgmt CPU is responsible for allocating VFs to different computing resource nodes. Therefore, different computing resource nodes can access the same PCIe SSD logic block at the same time to achieve data sharing. Multiple computing resource nodes can simultaneously read the same PCIe SSD logic block.
  • the same PCIe SSD logic block can be written at the same time, but the consistency of the data requires the upper layer software to coordinate and guarantee.
  • the PCIe SSD Controller maps the SSD block A and the SSD block B to the VF-1, the SSD block B and the SSD block C to the VF-2, and the Mgmt CPU allocates the VF-1 to the computing resource.
  • the node A allocates the VF-2 to the computing resource node B, so that the computing resource node A and the computing resource node B can simultaneously access the SSD block B, thereby supporting multiple computing resource nodes to simultaneously access the same PCIe SSD logical block.
  • a SAS/SATA interface disk can be supported as a physical disk to be allocated to a computing resource node as needed.
  • HBA/RAID can include HBA/RAID Controller in hardware.
  • HBA/RAID Controller does not support SR-IOV, it can only be managed as a PCIe device by Mgmt CPU. The disk on the back end is invisible to PCIe network. of. Therefore, all the disks connected to a certain HBA/RAID Controller can be allocated to a computing resource node as a whole. The granularity of resource allocation is large, and it is difficult to achieve efficient use of resources.
  • the application is implemented in an scenario where the HBA/RAID Controller supports SR-IOV.
  • the HBA/RAID Controller supports SR-IOV, it supports mapping different disks to different VFs.
  • Each VF is a separate PCIe device in the PCIe network, and the Mgmt CPU is responsible for allocating VFs to different computing resource nodes.
  • the same VF cannot be assigned to multiple compute resource nodes. Therefore, it is possible to indirectly implement different physical disks to be allocated to different computing resource nodes.
  • the HBA/RAID Controller maps Disk-1 and Disk 2 to VF-1, Disk-3 and Disk-4 to VF-2, and the Mgmt CPU assigns VF-1 to Computing Resource Node A.
  • the VF-2 is allocated to the computing resource node B, so that the computing resource node A can access the disk-1 and the disk-2, and the computing resource node B can access the disk-3 and the disk-4, thereby supporting the SAS/SATA interface disk. It is allocated to the computing resource node as needed in the form of a physical disk.
  • a SAS/SATA interface disk can be supported as a logical disk to be allocated to a computing resource node as needed.
  • the HBA/RAID Controller can aggregate one or more physical disks, divide it into one or more logical disks, and then map the logical disks to different VFs.
  • Each VF is a separate PCIe device in the PCIe network, and the Mgmt CPU is responsible for allocating VFs to different compute nodes. Therefore, the management allocation of resources can be performed at a smaller granularity to improve resource utilization.
  • the HBA/RAID Controller maps logical disk-1 and logical disk-2 to VF-1, logical disk-3 and logical disk-4 to VF-2, and Mgmt CPU will VF- 1 is allocated to the computing resource node A, and VF-2 is allocated to the computing resource node B, so that the computing resource node A can access the logical disk-1 and the logical disk-2, and the computing resource node B can access the logical disk-3 and the logic Disk-4, which supports the allocation of SAS/SATA interface disks to compute resource nodes as logical disks.
  • multiple computing resource nodes can be simultaneously accessed to access the same logical SAS/SATA interface disk.
  • the HBA/RAID Controller can map the same logical disk to different VFs, and the Mgmt CPU is responsible for allocating VFs to different computing resource nodes. Therefore, different computing resource nodes can access the same logical disk at the same time to achieve data sharing. Multiple computing resource nodes can simultaneously read the same logical disk. Technically, the same logical disk can be written at the same time, but the consistency of the data needs to be coordinated by the upper layer software.
  • the HBA/RAID Controller maps logical disk-1 and logical disk-2 to VF-1, logical disk-2 and logical disk-3 to VF-2, and Mgmt CPU will VF- 1 is allocated to the computing resource node A, and the VF-2 is allocated to the computing resource node B, so that both the computing resource node A and the computing resource node B can access the logical disk-2, thereby supporting multiple computing resource nodes to simultaneously access the same Logical SAS/SATA interface disk.
  • a physical disk or a logical disk may be allocated to the computing resource node by using a dynamic or static configuration, and different numbers and different types of storage resources may be configured according to the requirements of the computing resource node, which are flexible and changeable, and can satisfy each A variety of business needs.
  • the number of storage resources allocated to the computing resource node can be dynamically increased or decreased.
  • the number of storage resources such as PCIe SSD
  • PCIe SSD PCIe SSD
  • portions of the invention may be implemented in hardware, software, firmware or a combination thereof.
  • multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a suitable instruction execution system For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium.
  • the above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

L'invention concerne un système de stockage, comprenant un nœud de ressources de calcul, un nœud de ressources de stockage et un réseau PCIe. Le nœud de ressources de calcul et le nœud de ressources de stockage sont respectivement connectés au réseau PCIe. Le réseau PCIe, le nœud de ressources de calcul et le nœud de ressources de stockage sont physiquement séparés et extensibles. Le système de stockage une flexibilité améliorée, une meilleure vitesse d'accès aux ressources de stockage, et un faible coût. De plus, le système de stockage peut simultanément prendre en charge des disques ayant au moins une des interfaces SAS, SATA et PCIe, et des supports de stockage sur les disques peuvent comprendre un Disque Dur (HDD) et un disque à circuits intégrés (SSD). Un système de stockage hybride est obtenu en prenant en charge des disques ayant des interfaces différentes et différents supports de stockage. De plus, le système de stockage peut attribuer un disque physique ou logique à un nœud de ressources de calcul par une configuration dynamique ou statique, ce qui permet de réaliser une attribution de ressources à la demande.
PCT/CN2015/090005 2015-06-26 2015-09-18 Système de stockage WO2016206198A1 (fr)

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CN103312720A (zh) * 2013-07-01 2013-09-18 华为技术有限公司 一种数据传输方法、设备及系统
CN104639469A (zh) * 2015-02-06 2015-05-20 方一信息科技（上海）有限公司 一种基于pcie互连的计算和存储集群系统

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