A method includes: receiving, at a cluster controller of a first cluster, a request for pairing a first datastore of the first cluster to a second datastore of a second cluster, wherein each of the first cluster and the second cluster includes a plurality of datastores; determining whether the first datastore is available for pairing; in response to determining that the first datastore is available for pairing, generating an entry in a mapping table indicating that the first datastore is paired with the second datastore; receiving information associated with the second datastore; and in response to receiving the information, storing the information in the first datastore. The second cluster performs similar operations as those performed by the first cluster to achieve a bidirectional reservation between the first cluster and the second cluster.

Data may be replicated from a host storage system to a target storage system. It may be determined to replicate a first logical storage element on the source storage system to a second logical storage element on the target storage system, wherein the first logical storage element defines a first data portion having a first value. It may be determined that a third logical storage element on the target storage system defines a second data portion having the first value. The first logical storage element may be replicated to the second logical storage element by establishing a deduplication relationship between the second logical storage element and the third logical storage element on the target storage system without transmitting the first data portion from the source storage system to the target storage system.

A virtual disk migration method, apparatus and device, and a readable storage medium. Said method comprises: when a data change occurs in a cluster, updating the label of the cluster in a binary table to a first target value (S101); copying data in the cluster to a second data center, and updating the first target value to a second target value (S102); and upon reception of an instruction for migrating a virtual machine to the second data center (S103), controlling the virtual machine to stop operating, querying the first target value in the binary table, and migrating data in the cluster corresponding to the queried first target value to the second data center (S104). A part of data is copied to a second data center in advance on the basis of a binary table, and when a virtual machine is migrated, only the other part of data needs to be migrated, thereby reducing the data migration amount and migration time, and improving the migration efficiency of a virtual disk and a virtual machine.

A node mode adjustment method for when a storage cluster BBU fails and related component. The storage cluster comprises multiple IO GROUPs; each IO GROUP comprises two nodes, and each node is connected to a corresponding BBU of the node. The method comprises: monitoring the status of each BBU in the storage cluster; after detecting that any one BBU has failed, when it is determined that the BBU connected to the peer node of the node to which the failed BBU is connected has not failed, and it is determined that the storage cluster is not downgraded, maintaining in a write-back mode the node connected to the BBU detected to have failed and the peer node of said node. Applying the solution of the present application will help to ensure that the storage cluster has the advantages of high and high IO performance.

In some examples, a computing device may communicate with a plurality of network storage systems, such as a first network storage system provided by a first service provider employing a first storage protocol and a second network storage system provided by a second service provider employing a second storage protocol different from the first storage protocol. The computing device receives a first object, and determines, for the first object, a first remote bucket at the first network storage system and a second remote bucket at the second network storage system. The computing device may add a synchronization event to a queue for replicating the first object to the first remote bucket and the second remote bucket. Based on consuming the synchronization event from the queue, the computing device replicates data and metadata of the first object to the first remote bucket and the second remote bucket.

Metadata of a storage object is managed. An example method for managing metadata of a storage object comprises: in response to receiving a request to access metadata of a storage object, obtaining a first identifier of the storage object from the request; determining, based on the first identifier, a second identifier of a page where the metadata is located, an address of the page and the second identifier being stored in association in an entry of a page table distributed among a plurality of storage devices with different access speeds; determining, from the plurality of storage devices, a storage device storing the entry; and obtaining the address of the page by accessing the entry from the storage device, so as to access the metadata from the page.

Mechanisms and techniques are employed for managing the allocation and load balancing of storage system resources for the containerized, distributed execution of applications on a storage system. A control component executing on a processing component of the storage system may control reserving the necessary resources on one or more processing components to implement an application, and control a container management module to create, deploy and/or modify one or more containers on one or more processing components of the storage system. The one or more containers then may be executed to implement the application. Multiple processing components of the storage system may have a resource management module executing thereon. The control component may exchange communications with the one or more resource management modules of each processing component to determine the resources available within the processing component; e.g., to determine whether the processing component can satisfy the resource requirements of the application.

A first cloud vendor is registered by a backup application. A file is moved from backup storage of the backup application to the first cloud vendor. A reference is maintained at the backup storage to the first file residing at the first cloud vendor. A second cloud vendor is registered by the backup application. The backup application directs a migration of the file from the first cloud vendor to the second cloud vendor without recalling the file to the backup storage. A reference maintained at the backup storage is updated to refer to the file now residing at the second cloud vendor. The updated reference is maintained at the backup storage.

A synchronous write operation is decomposed into an asynchronous write operation and a separate flush operation. The payload of the write operation is sent a plurality of storage nodes hosting replicas of a virtual storage volume. The write operation is only acknowledged after the payload is stored in kernel memory in a quorum of storage nodes hosting replicas. Write operations are only flushed to persistent storage after a predetermined window of time has transpired or after a threshold number of outstanding write operations that have been acknowledged, but not yet flushed, has been reached.

An information processing apparatus calculates, in a case where an object including at least one of data or metadata related to the data is recorded in a magnetic tape including a first partition in which one or more objects are to be recorded and a second partition in which pieces of the metadata are to be recorded, a second ratio as a ratio between a size of the first partition and a size of the second partition in the magnetic tape by using a first ratio as a ratio between a total size of the objects and a total size of the pieces of the metadata.