Data reading and writing method, device and storage system

Abstract

The present invention provides a data read and write method and apparatus and a storage system. The data read and write method includes: receiving, by a block storage driver of an origination end device, a request for an LBA-based operation on a volume; converting the LBA-based operation request into a Key addressing-based operation request; and sending the Key addressing-based operation request to a routing library. Therefore, according to the present invention, reliability, availability, extensibility, and cheapness of the storage system may be improved, satisfying mass storage requirements for high extensibility, high reliability, high availability, and cheapness.

Description

technical field [0001] The embodiments of the present invention relate to the field of information technology, and in particular, to a data reading and writing method, device and storage system. Background technique [0002] With the development of the network, information has shown explosive growth, and human data has reached an unprecedented scale. The storage and management of these ultra-large-scale data has become a major challenge. Although the capacity of hard disks is increasing and the storage speed is increasing, the traditional Direct hard disk storage and the use of multiple external disk arrays have been difficult to meet the requirements of massive information management for the scalability, reliability and high availability of the storage subsystem. [0003] In the prior art, a typical block storage system can generally be simplified into two parts, the initiator and the target. The initiator generates a volume locally and establishes a connection with the tar...

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Problems solved by technology

[0005] However, in the existing technology, the block storage service provided by the target has certain constraints in terms of reliability, availability, scalability, and cheapness.

[0006] Specifically, in terms of reliability and availability, the existing technology mainly ensures data reliability by constructing RAID in the target cabinet and adopting multi-controller head redundancy (such as dual-controller disk array), but if the cabinet appears Power failure, failure of two or more controller heads at the same time may cause data loss or service interruption, which further affects availability; in terms of scalability, if the target end uses Internet Storage Area Network (ISA Network; hereinafter referred to as: IP SAN) or Fiber Channel Storage Area Network (FC Storage Area Network; hereinafter referred to as: FC SAN), the capacity of the target end will be limited by the processing capacity of the controller head of the IP SAN or FC SAN, supported The maximum capacity will be constrained and cannot be expanded on a large scale;

[0007] In terms of maintainability, when a disk array built by a traditional RAID group fails, it needs to be replaced in time and the RAID must be rebuilt to ensure redundancy and data reliability. This requires maintenance personnel to replace it at any time. The system cannot automatically handle such failures;

[0008] In terms of cheapness, the price of IP SAN or FC SAN as the target end is relatively high, especially FC SAN, and the related switching equipment required for it is also expensive; although the cost of the storage server as the target end is relatively low, due to storage The server does not have high requirements for processors and memory, and the performance of disk I / O is low

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