Abstract: A method is provided for collaborative caching between a server cache (104) of a server computer (102) and an array cache (112) of a storage array (110) coupled to the server computer. The method includes collecting instrumentation data on the server cache and the array cache of the storage array and, based on the instrumentation data, adjusting the operation of at least one of the server cache and the array cache.

Abstract: A group address range is mapped to a memory address range of a nonvolatile memory. A first memory address of the memory address range is to be copied to a volatile memory if the first memory address is mapped to the group address range and a write access is requested for the first memory address. The group address range is transferred from a first node to a second node in response to a synch command. The copied address is to be written the NVM after the group address range is transferred.

Abstract: A group table includes one or more groups. A synch command including a synch address range is received. An order data of the one or more groups is flushed is determined by whether the synch address range is included in the one or more groups.

Abstract: A memory access request including an address is received from a memory controller of an application server. One of a plurality of paths to the NVRAM is selected based on the address from the memory access request.

Abstract: A technique includes, in response to a first stream of writes to a first non-volatile memory system, generating a second stream of writes for a second non-volatile memory system; and coordinating replication of data stored in the first non-volatile memory system. The coordinating includes embedding at least one command in the second stream of writes to create a synchronization point for data storage in the second non-volatile memory system in response to at least one corresponding command in the first stream to create a synchronization point for data storage in the first non-volatile memory system.

Abstract: Embodiments herein relate to selecting an application server to nonvolatile random access memory (NVRAM) path. The path provides direct access between an application server and the NVRAM. The path is to transmit data related to at least one of a read and write request to a virtual memory of the application server.

Abstract: Optimization of a RAID volume is described. In an example, a method of optimizing a redundant array of independent disks (RAID) volume includes: identifying a RAID level used for a plurality of disks in the RAID volume; defining a relation among rebuild rate, scrub rate, and annualized data loss event rate (ADLER) for the RAID volume using constant values and the RAID level; selecting a value for the ADLER; applying a policy to the relation to choose a value for one of the rebuild rate or the scrub rate; and determining a value for the other of the rebuild rate or the scrub rate from the relation using the value of the rebuild rate or the scrub rate as determined from the policy.

Abstract: A method is provided for collaborative caching between a server cache (104) of a server computer (102) and an array cache (112) of a storage array (110) coupled to the server computer. The method includes collecting instrumentation data on the server cache and the array cache of the storage array and, based on the instrumentation data, adjusting the operation of at least one of the server cache and the array cache.

Abstract: Disclosed herein is a technique to transfer at least one unfinished operation from one controller to a second controller, if the first controller has ceased.

Abstract: Embodiments include methods, apparatus, and systems for managing resources in a storage system. One embodiment includes a method that discovers storage resources for arrays in a cluster storage system. A table defines how the resources are divided among the arrays and is provided to the arrays so each array can identify which resources to manage.

Abstract: Optimization of a RAID volume is described. In an example, a method of optimizing a redundant array of independent disks (RAID) volume includes: identifying a RAID level used for a plurality of disks in the RAID volume; defining a relation among rebuild rate, scrub rate, and annualized data loss event rate (ADLER) for the RAID volume using constant values and the RAID level; selecting a value for the ADLER; applying a policy to the relation to choose a value for one of the rebuild rate or the scrub rate; and determining a value for the other of the rebuild rate or the scrub rate from the relation using the value of the rebuild rate or the scrub rate as determined from the policy.

Abstract: Data de-duplication is done on a data set. The data de-duplication is done using a partial digest table. Some digests are selective removed from the partial digest table when a pre-determined condition occurs.

Abstract: In one embodiment a method of creating a clustered computing system, comprises storing license information for a computing cluster in a memory module associated with a computing node, wherein the licensing information includes a bundle-type parameter that identifies a characteristic of the cluster and one or more node license parameters that identifies a characteristic of a computing node, initializing the computing cluster in a first computing node, adding one or more available computing nodes to the computing cluster; and activating the computing cluster when the computing cluster includes a number of nodes that complies with the bundle-type parameter.

Abstract: A system and method are provided for allocating storage resources. An exemplary method comprises providing a storage service catalog that lists storage services available for use. The exemplary method also comprises allowing a user to select a subset of the storage services from among the storage services via a self-service software tool.

Abstract: A system includes a solid state persistent storage device, and a plurality of storage controllers to manage access of the solid state persistent storage device. An expander circuit is connected to the solid state persistent storage device and has a plurality of computer-based bus interfaces connected to the corresponding plurality of storage controllers.

Abstract: Embodiments include methods, apparatus, and systems for choosing nodes in a multi-network. One embodiment includes a method that receives demand characteristics for nodes to form a cluster in multi-network and collapses groups of nodes in the multi-network to form a node group. The method then selects nodes that satisfy the demand characteristics in order to form the cluster.

Abstract: In one embodiment a storage controller comprises a processor, a computer readable storage medium coupled to the processor, and logic instructions in the memory module which, when executed by the processor, configure the processor to receive, in a quality of service module, a first command request from a host initiator port, associate a time-out threshold with the first command request, determine, in the quality of service module, whether an available priority queue can release the first command request for execution by a scheduling module within the time-out threshold; and in response to a determination that an available priority queue can release the first command request for execution within the time-out threshold, assign the first command request to the available priority queue.

Abstract: In one embodiment a storage controller comprises a processor, a computer readable storage medium coupled to the processor, and logic instructions in the memory module which, when executed by the processor, configure the processor to receive, in a quality of service module, a first command request from a host initiator port, associate a time-out threshold with the first command request, determine, in the quality of service module, whether an available priority queue can release the first command request for execution by a scheduling module within the time-out threshold; and in response to a determination that an available priority queue can release the first command request for execution within the time-out threshold, assign the first command request to the available priority queue.

Abstract: A system includes a solid state persistent storage device, and a plurality of storage controllers to manage access of the solid state persistent storage device. An expander circuit is connected to the solid state persistent storage device and has a plurality of computer-based bus interfaces connected to the corresponding plurality of storage controllers.

Abstract: Embodiments of the present invention are directed to digitally encoded hierarchical timestamps that are stored in computer readable mediums. The hierarchical timestamps of the present invention include a first field that stores a timestamp value and a second field that stores a processing-level indication that indicates the scope of the timestamp within a hierarchical processing system.