Abstract: A device for executing an operation on a database is provided. The device comprises a C-queue configured to store a plurality of column-oriented operations, an R-queue configured to store a plurality of row-oriented operations, a scheduler configured to assign the operation to the C-queue or the R-queue based on whether the operation is row-oriented, a timing unit configured to alternate between C-type time slots and R-type time slots, an execution unit configured to execute operations from the C-queue in C-type time slots and/or operations from the R-queue in R-type time slots.

Abstract: Device for executing an operation on a database, the device comprising a C-queue configured to store a plurality of column-oriented operations, an R-queue configured to store a plurality of row-oriented operations, a scheduler configured to assign the operation to the C-queue or the R-queue based on whether the operation is row-oriented, a timing unit configured to alternate between C-type time slots and R-type time slots, an execution unit configured to execute operations from the C-queue in C-type time slots and/or operations from the R-queue in R-type time slots.

Abstract: A data storage device is provided, comprising a control module a first storage module a second storage module a third storage module and a buffer. The first storage stores a plurality of data sets. The control module receives requests for operations to be carried out on the plurality of data sets in the first storage module, executes the received requests and copies the plurality of data sets in the first storage module to the second storage module at a predetermined time. The control module further adds the received requests for operations to the buffer and persists the buffer to the third storage module by a synchronization means. The data storage device initializes the plurality of data sets in the first storage module from the second storage module and carries out operations corresponding to the requests from the third storage module in a recovery scenario.

Abstract: A data storage device is provided, comprising a control module a first storage module a second storage module a third storage module and a buffer. The first storage stores a plurality of data sets. The control module receives requests for operations to be carried out on the plurality of data sets in the first storage module, executes the received requests and copies the plurality of data sets in the first storage module to the second storage module at a predetermined time. The control module further adds the received requests for operations to the buffer and persists the buffer to the third storage module by a synchronization means. The data storage device initializes the plurality of data sets in the first storage module from the second storage module and carries out operations corresponding to the requests from the third storage module in a recovery scenario.