Technologies are provided to ensure integrity of erasure coded data that is subject to read and write access from distributed processes. Multiple processes that access erasure coded data can be coordinated in an efficient, scalable and fault-tolerant manner so that integrity of the original data is maintained. The Technologies include a fault-tolerant access coordination protocol that ensures exclusive write access by a client. The coordination protocol achieves scalability by not relying on centralized components, and achieves efficiency and performance by piggy-packing access coordination messages on operations of the underlying erasure coding protocol.

Examples of systems are described herein which may dynamically allocate compute resources to recovery clusters. Accordingly, a recovery site may utilize fewer compute resources in maintaining recovery clusters for multiple associate clusters, while ensuring that, during use, compute resources are allocated to a particular cluster. This may reduce and/or avoid vulnerabilities arising from a use of shared resources in a virtualized and/or cloud environment.

Techniques manage a redundant array of independent disks. In such a technique, a response time of a first storage device in the RAID is compared to a first threshold. In response to the response time of the first storage device exceeding the first threshold, the first storage device is configured as a pseudo-degraded storage device, such that the pseudo-degraded storage device is responsive to write requests only.

A memory system includes: a memory device; a first queue suitable for queuing commands received from a host; a second queue suitable for enqueuing the commands from the first queue and dequeuing the commands to the memory device according to the FIFO scheme; and a processor suitable for: delaying enqueuing a read command into the second queue until the program operation is successfully performed when a logical address of a write command, in response to which a program operation is being performed, is the same as a logical address corresponding to the read command enqueued in the first queue; and determining whether or not to enqueue a subsequent read command, which is enqueued in the first queue after the read command, into the second queue.

A computer-implemented method for testing failover may include: determining one or more cross-regional dependencies and traffic flow of an application in a first region of a cloud environment, wherein the one or more cross-regional dependencies include a dependency of the application in the first region of the cloud environment to one or more applications in at least one other region of the cloud environment; determining a risk score associated with performing failover of the application to a second region of the cloud environment at least based on the determined one or more cross-regional dependencies and traffic flow of the application; comparing the determined risk score with a predetermined risk score; in response to determining that the determined risk score is lower than the predetermined risk score, performing failover of the application to the second region of the cloud environment; isolating the second region of the cloud environment from the first region of the cloud environment for a predetermined period of time; and monitoring operation of the application in the second region of the cloud environment during the predetermined period of time.

Systems and methods are provided to manage a replication service of a block storage volume to increase dependability and/or decrease data loss. Each snapshot of a block storage volume can include a point-in-time representation of the volume. Each snapshot may include multiple objects that correspond to one or more blocks of the volume. One or more objects of a snapshot may reference a parent snapshot instead of a block of the volume. Each object of a snapshot may be replicated a number of times based on the number of references by other snapshots. The number of replicas may be based on the number of snapshots referencing the object or the number of unique clients referencing the object. The replication service can manage the replicas of the object and increase or decrease the number of replicas as needed.

A distributed database encrypts a table using a table encryption key protected by a client master encryption key. The encrypted table is replicated among a plurality of nodes of the distributed database. The table encryption key is replicated among the plurality of nodes, and is stored on each node in a respective secure memory. In the event of node failure, a copy of the stored key held by another member of the replication group is used to restore a node to operation. The replication group may continue operation in the event of a revocation of authorization to access the client master encryption key.

A method and system for auto live-mounting database golden copies. Specifically, the disclosed method and system entail reactively auto live-mounting golden copy databases on hosts or proxy hosts based on the operational state of one or more database hosts and/or one or more assets (or databases) residing on the database host(s). Should a database host prove to be unresponsive, through periodic monitoring, databases residing on the database host may be brought back online on a proxy database host using stored golden copies respective of the aforementioned databases. Alternatively, should a given database on any database host exhibit an operational abnormality (e.g., an error, failure, etc.), the given database may be brought back online on the database host or a proxy database host using a stored golden copy respective of the given database. Accordingly, through the disclosed method and system, database outages may be minimized.

Systems and methods are provided for using a file-sharing service to identify, execute, and provide continuing access to remote computer programs. In certain embodiments, a list of files to be accessed remotely is provided to a first device, a selection is received from a user at the first device identifying a file from the provided list, and an application is executed on a second device to access a copy of the identified file, which is synchronized with a file-sharing service.

Methods and systems for managing sets of transactions for replication are provided. A system includes a number of origination nodes forming a source array. A sequence number generator generates sequence numbers based, at least in part, on a time interval during which a transaction is received. A subset manager groups transactions into subsets based, at least in part, on the sequence number.