Physical disk sharing method and apparatus

Abstract

The present invention discloses a physical disk sharing method and apparatus. The method comprises: organizing a plurality of volumes and snapshots to be allocated to a front-end device into a plurality of tree structures; using a three-element array to identify each volume or snapshot in the plurality of tree structures, wherein the three-element array comprises a tree identifier, a branch identifier, and a node identifier; striping each volume or snapshot by using a data block of a predetermined size; using a four-element array to identify each data block in each volume or snapshot in the plurality of tree structures, wherein the four-element array comprises a tree identifier, a branch identifier, a node identifier, and a data block identifier; performing a combination calculation on the four-element array corresponding to each data block to acquire a unique identifier; performing a distributed hash operation on the unique identifier to acquire a route identifier; matching one routing identifier to one network address of a physical disk to form a route relationship table; and storing the route relationship table. According to the technical scheme, the method and apparatus provided by the present invention support concurrent access, and system reliability can also be dramatically improved.

Description

technical field [0001] The invention relates to the technical field of network distributed storage, in particular to a method and device for sharing a physical disk. Background technique [0002] With the explosive growth of data volume, the stored data files are getting bigger and bigger. The traditional data storage methods can no longer meet the growing demand. Distributed storage technologies have sprung up in recent years. The existing distributed storage Many technologies are used, such as IP-SAN (IP-StorageAreaNetwork, IP-Storage Area Network) technology, which came into being in response to the current development trend of big data and is gradually replacing traditional NAS and SAN storage devices. [0003] Such as figure 1 as shown, figure 1 It is a schematic diagram of the system structure of the existing IP-SAN technology, such as figure 1 As shown, the IP-SAN system uses the iscsi (internetSmallComputerSystemInterface, Internet Small Computer Interface) protoc...

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Problems solved by technology

[0004] In the prior art, multiple initiators communicate with the same volume 100 through network connections and sessions. However, since a single volume 100 of the back-end storage device needs to be shared with multiple initiators at the same time, this will cause the front-end sharing device to Storage performance is limited. When initiator 1, initiator 2, and initiator 3 concurrently access a single volume at the same time, they actually access the same physical disk. When there are too many initiators, the load on a single physical disk is too large , will cause blocking, so that the initiator cannot normally access a single volume, so the existing technology cannot support concurrent access due to the limitation of its own network architecture, and the reliability is low

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