Abstract: The present disclosure discloses a data reading method, which is applied to a cache mirror image pair. The cache mirror image pair includes a first node and a second node which are mirror images of each other. The method includes: when the first node receives a data reading request, determining the current state of the first node; when the current state of the first node is a mirror image recombination state, determining whether request data corresponding to the data reading request hit cache of the first node or not; if Yes, reading the request data from the cache of the first node; if No, reading the request data from cache of the second node; and feeding the request data back to a request terminal.

Abstract: Embodiments of the present disclosure relate to a cache method and apparatus applied to all-flash storage, a device, and a medium. The method includes the following steps: acquiring and storing, by a multi-path node, write request information, and sending the write request information to storage nodes; generating, by the storage nodes, confirmation information corresponding to the write request information, and returning the confirmation information to the multi-path node; and determining the number of the confirmation information returned to the multi-path node, and in the case that the number of the confirmation information returned to the multi-path node is not less than one half of the number of the storage nodes, deleting the write request information stored to the multi-path node.

Abstract: Provided is a cache mirroring method applied to a master node. A batch of small Input/Output (IO) blocks in an all-flash product may be aggregated into a large IO block via a ProtoBuff, and a corresponding mirroring request is sent to a slave node, so as to achieve cache mirroring. In addition, the present application also provides a cache mirroring apparatus applied to a master node, a cache mirroring method and apparatus applied to a slave node, an all-flash storage device, and an all-flash storage system, the technical effects of which correspond to the technical effects of the method.

Abstract: The present disclosure discloses a data reading method, which is applied to a cache mirror image pair. The cache mirror image pair includes a first node and a second node which are mirror images of each other. The method includes: when the first node receives a data reading request, determining the current state of the first node; when the current state of the first node is a mirror image recombination state, determining whether request data corresponding to the data reading request hit cache of the first node or not; if Yes, reading the request data from the cache of the first node; if No, reading the request data from cache of the second node; and feeding the request data back to a request terminal.

Abstract: An IO path determination method and apparatus, and a device and a readable storage medium. The method comprises: determining a target volume of an IO request, and acquiring a path level of the target volume; when the path level is a host path level, sending the IO request to a preset preferable controller; when the path level is a back-end path level, selecting a target controller from controllers by using a consistent hashing algorithm, and sending the IO request to the target controller; and when the path level is a fault level, determining that a fault occurs in an IO path. An IO path is determined by means of setting different path levels for a volume and in conjunction with a consistent hashing algorithm, such that loads of controllers in a storage system can be effectively balanced.

Abstract: An IO path determination method and apparatus, and a device and a readable storage medium. The method comprises: determining a target volume of an IO request, and acquiring a path level of the target volume; when the path level is a host path level, sending the IO request to a preset preferable controller; when the path level is a back-end path level, selecting a target controller from controllers by using a consistent hashing algorithm, and sending the IO request to the target controller; and when the path level is a fault level, determining that a fault occurs in an IO path. An IO path is determined by means of setting different path levels for a volume and in conjunction with a consistent hashing algorithm, such that loads of controllers in a storage system can be effectively balanced.

Abstract: Provided is a cache mirroring method applied to a master node. A batch of small Input/Output (IO) blocks in an all-flash product may be aggregated into a large IO block via a ProtoBuff, and a corresponding mirroring request is sent to a slave node, so as to achieve cache mirroring. In addition, the present application also provides a cache mirroring apparatus applied to a master node, a based cache mirroring method and apparatus applied to a slave node, an all-flash storage device, and an all-flash storage system, the technical effects of which correspond to the technical effects of the method.