摘要:
Embodiments relate to providing error recovery in a storage system that utilizes data redundancy. An aspect of the invention includes monitoring plurality of storage devices of the storage system and determining that one of the plurality of storage devices has failed based on the monitoring. Another aspect of includes suspending data reads and writes to the failed storage device and determining that the failed storage device is recoverable. Based on determining that the failed storage device is recoverable, initiating a rebuilding recovery process of the failed storage device based on determining that the failed storage device is recoverable and restoring data reads and writes to the failed storage device upon completion of the rebuilding recovery process.
摘要:
Embodiments relate to optimizing write performance of a flash device. Aspects include receiving a request to evict a plurality of pages from a main memory and determining a block size for the flash device. Aspects also include grouping the plurality of pages from the main memory into a move specification block, wherein a size of the move specification block is the block size and writing the move specification block to the flash device. The block size being determined based on one or more operational characteristics of the flash device.
摘要:
A method and apparatus for providing configuration information is provided in a network computing environment having a plurality of hosts and at least one Gateway attachment and a channel interface, using a QDIO device. A set of special tables and commands are provided at initialization time over the channel interface which provide all configuration information. The tables can map any Host images and Host Device Addresses which will be using the QDIO Interface to the specific bits defined in a SIGA vector, the SIGA Vector giving initiative to said QDIO connected Gateway device.
摘要:
A computer program product is provided and includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for detecting connections of two or more input/output (I/O) adapters, each of the two or more I/O adapters having one or more solid state devices (SSDs) connected thereto, and presenting a storage class memory address space for all of the connected SSDs that is independent of connections and disconnections between each of the one or more SSDs and each of the two or more I/O adapters and the processing unit.
摘要:
A computer program product is provided and includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for detecting connections of two or more input/output (I/O) adapters, each of the two or more I/O adapters having one or more solid state devices (SSDs) connected thereto, and presenting a storage class memory address space for all of the connected SSDs that is independent of connections and disconnections between each of the one or more SSDs and each of the two or more I/O adapters and the processing unit.
摘要:
A computer program product and storage device used for exchange and transfer of data in a network computing system having a main storage capable of connecting to at least one application server and an interface element with at least one adapter capable of establishing processing communication with at least one application user(s). The program device comprises a a computer program storage device readable by a digital processing apparatus and a program means comprising the steps of: receiving incoming data using said adapter; setting up one or more queues in main storage without causing interrupts in any running programs; updating status of said network computing system to reflect said new data; processing data in said main storage by interrogating multiple existing queues in said main storage simultaneously; and determining from interrogating said queues appropriate application server to which said data has to be forwarded to; designating at least one set of queues in said queuing mechanism as input queues and another as output queues; issuing a signal adapter instruction to provide initiative to check content of any or all queues in said queuing mechanism; specifying initiate-output or initiate-input appropriately by means of said signal adapter instruction to cause associated adapter to asynchronously process said output or input queues; and causing synchronization by means of said signal adapter instruction by signaling said associated data queues to update all entries in order to render them current. The program product runs in the same environment and performs similar tasks.
摘要:
Disclosed is a method for detecting errors in a computer system including a processing unit to perform tasks to change items. The method comprises the steps of assigning a task control block to the processing unit, and using the task control block to keep track of items being changed by the processing unit. The method comprises the further steps of at defined times, checking the task control block to identify items being changed by the processing unit, and checking the states of said identified items to determine if those states are correct. The preferred embodiment of the invention detects an error when it arises (where possible), and utilizes an infrastructure that allows simple and periodic consistency checks (for example, at designated code points) that detect the error before it causes follow-on problems.