Abstract: Systems and methods for handling input/output operations during a space crunch are described herein. An example method includes striping a volume across a plurality of storage nodes, and maintaining a cluster volume table (CVT) storing information regarding distribution of the logical blocks. Additionally, the CVT includes a plurality of entries, where each of the entries includes information identifying a respective owner storage node of a respective logical block. The method also includes receiving a write I/O operation directed to an unallocated logical block owned by a landing storage node, where the landing storage node lacks free storage capacity, and locking the unallocated logical block. The method further includes updating the CVT to identify a storage node having free storage capacity as owner storage node of the unallocated logical block, and unlocking the unallocated logical block, wherein the write I/O operation proceeds at the storage node having free storage capacity.

Abstract: Systems and methods for consolidating space in a storage cluster are described herein. An example method can include striping a volume across a plurality of storage nodes, and maintaining a cluster volume table (CVT) storing information regarding distribution of a plurality of logical blocks across the storage nodes. The CVT can include a plurality of entries, where each of the entries can include information identifying a respective owner storage node of a respective logical block. The method can also include adding a new storage node to the storage cluster, and transferring data for one or more logical blocks from each of the storage nodes to the new storage node based on respective usage ratios of the storage nodes. The method can further include updating the CVT to identify the new storage node as owner storage node of the one or more logical blocks transferred to the new storage node.

Abstract: An example computer-implemented method for performing failover operations in a data storage system is described herein. The data storage system can include a first storage controller and a second storage controller for processing input/output (“I/O”) operations for the data storage system. The method can include, in response to a failure of the first storage controller, performing failover operations with the second storage controller, and processing the I/O operations with the second storage controller. The failover operations can include preparing a disk subsystem layer for I/O operations, preparing a device manager layer for the I/O operations, and preparing a network layer for the I/O operations. The disk subsystem, device manager, and network layers can be prepared for the I/O operations without dependencies. In particular, preparation of the network layer is not dependent on preparation of the disk subsystem layer or the device manager layer.

Abstract: A detachable charging system for a vehicle including an interface device that receives power from the vehicle and outputs the power to a detachable charging unit that detachably couples with and electrically connects to the interface device. The detachable charging unit includes a power storage device. The detachable charging unit outputs power stored in the power storage device to a mobile device when the detachable charging unit is detached from the interface device. The detachable charging unit outputs power received from the interface device and/or stored in the power storage device to the mobile device when the charging unit is electrically connected to the interface device.

Abstract: A detachable charging system for a vehicle including an interface device that receives power from the vehicle and outputs the power to a detachable charging unit that detachably couples with and electrically connects to the interface device. The detachable charging unit includes a power storage device. The detachable charging unit outputs power stored in the power storage device to a mobile device when the charging unit is detached from the interface device. The detachable charging unit outputs power received from the interface device and/or stored in the power storage device to the mobile device when the charging unit is electrically connected to the interface device.

Abstract: Technologies are described herein for providing snapshot-assisted synchronous replication between a first storage server and a second storage server. For example, a notification is received at the second storage server that the first storage server has resumed operations following a failure. At this time, the first storage server is in a first current state and the second storage server is in a second current state. Upon receiving the notification, a common snapshot is identified between the first storage server and the second storage server. Upon identifying the common snapshot, the first storage server is rolled back from the first current state to a previous state according to the common snapshot, and upon rolling back the first storage server from the first current state to the previous state, the first storage server and the second storage server are resynchronized using the common snapshot.

Abstract: Technologies are described herein for providing information lifecycle management (ILM)-assisted synchronous replication between a first storage server having a first current state and a second storage server having a second current state. For example, a notification is received at the first storage server that indicates the second storage server has resumed operations following a failure that occurred at a failure time. At this time, the first storage server is in the first current state and the second storage server is in the second current state that is different than the first current state. Then, ILM data for the first storage server is retrieved, and at least one block of data on the first storage server that was accessed after the failure time is identified. After identifying the at least one block of data, the identified block of data is re-synchronized between the first storage server and the second storage server.