Abstract: In at least embodiment, processing can include: receiving virtual utilizations (VUs) for resources consumed in connection with recording entries in a log for commands or operations, wherein each resource has a corresponding VU which denotes a number of allocated units of the resource associated with entries of the log which have not been flushed from the log; determining a first resource having a maximum VU with respect to VUs of consumed resources; determining whether the maximum VU is within an acceptable VU range, wherein the acceptable VU range has bounds determined in accordance with a maximum deviation threshold associated with the first resource; and responsive to determining the maximum VU is not within the acceptable VU range of the first resource, performing one of a plurality of regulation actions that varies an amount of a system resource to accordingly vary a flush rate of entries from the log.

Abstract: Implementations of the present disclosure relate to method and device for managing a storage system. The method comprises in response to receiving a write request at a storage system, determining whether storage units allocated to a logic storage unit of the storage system are sufficient for data associated with the write request. The method also comprises in response to determining that the allocated storage units are insufficient, allocating a new storage unit to the logic storage unit. The method further comprises updating metadata associated with allocation of the storage units of the storage system, the metadata indicating a mapping between the logic storage unit and the storage units. The method also comprises encrypting the updated metadata. Other implementations of the present disclosure also involve corresponding method, device and computer-readable medium for decryption metadata and recovering the logic storage unit using the decrypted metadata.

Abstract: Nodes in a storage system can autonomously ingest I/O requests and flush data to storage. First and second nodes determine a sequence separator, the sequence separator corresponding to an entry in a page descriptor ring that separates two flushing work sets (FWS). The first node receives an input/output (I/O) request and allocates a sequence identification (ID) number to the I/O request. The first node determines a FWS for the I/O request based on the sequence separator and the sequence ID number, and commits the I/O request using the sequence ID number. The I/O request and the sequence ID number are sent to the second node.

Abstract: A protocol for processing write operations can include recording each write operation in a log using a PDESC (page descriptor)-PB (page block) pair. The log entry for the write operation can be included in a container of logged writes. In a dual node system, the protocol when processing the write operation, that writes first data, can include incrementing a corresponding one of two counters of the container, where the corresponding counter is associated with one of the system's nodes which received the write operation and and caches the first data. Each container can be associated with an logical block address (LBA) range of a logical device, where logged writes that write to target addresses in the particular LBA range are included in the container. Nodes can independently determine flush ownership using the container's counters and can flush containers based on the flush ownership.

Abstract: A protocol for processing write operations can include recording each write operation in a log using a PDESC (page descriptor)-PB (page block) pair. The log entry for the write operation can be included in a container of logged writes. In a dual node system, the protocol when processing the write operation, that writes first data, can include incrementing a corresponding one of two counters of the container, where the corresponding counter is associated with one of the system's nodes which received the write operation and and caches the first data. Each container can be associated with an logical block address (LBA) range of a logical device, where logged writes that write to target addresses in the particular LBA range are included in the container. Nodes can independently determine flush ownership using the container's counters and can flush containers based on the flush ownership.

Abstract: Embodiments of the present disclosure relate to a method, an electronic device, and a computer program product for managing a storage system. The method includes: determining, at a first device of the storage system, whether a load of a first accelerator resource of the first device exceeds a load threshold; sending, if it is determined that the load exceeds the load threshold, a job processing request to a second device in a candidate device list to cause the second device to process a target job of the first device using a second accelerator resource of the second device, the candidate device list indicating devices in the storage system that can be used to assist the first device in job processing; receiving, from the second device, latency information related to remote processing latency of processing the target job using the second accelerator resource; and updating the candidate device list based on the latency information. The embodiments of the present disclosure can optimize the system performance.

Abstract: An integrated circuit product includes a first layer of insulating material above a device layer of a semiconductor substrate and with a lowermost surface above an uppermost surface of a gate of a transistor in a device layer of the semiconductor substrate. A metallization blocking structure is in an opening in the first layer of insulating material and has a lowermost surface above the uppermost surface of the gate and includes a second insulating material that is different from the first insulating material. A metallization trench is in the first layer of insulating material on opposite sides of the metallization blocking structure. A contact structure is in the second insulating material and entirely below the metallization trench. A conductive metallization line includes first and second portions positioned in the metallization trench on opposite sides of the metallization blocking structure and a long axis extending along the first and second portions.

Abstract: Nodes in a storage system can autonomously ingest I/O requests and flush data to storage. First and second nodes determine a sequence separator, the sequence separator corresponding to an entry in a page descriptor ring that separates two flushing work sets (FWS). The first node receives an input/output (I/O) request and allocates a sequence identification (ID) number to the I/O request. The first node determines a FWS for the I/O request based on the sequence separator and the sequence ID number, and commits the I/O request using the sequence ID number. The I/O request and the sequence ID number are sent to the second node.

Abstract: Techniques for storage management involve determining, in response to a detection that a disk changes from an unavailable state to an available state, at least one candidate storage unit associated with the disk; acquiring historical access information about the at least one candidate storage unit, the historical information comprising information related to a write request directed to the at least one candidate storage unit when the disk is in the unavailable state; determining a target storage unit from the at least one candidate storage unit based on the historical access information; and rebuilding the target storage unit. Such techniques may, in a low-cost manner, improve rebuilding efficiency and reliability of a storage system.

Abstract: Techniques for managing data blocks involve: generating, based on a first hash algorithm, a first fingerprint for a first block. The techniques further involve: if it is determined that there is a second fingerprint, in a fingerprint database, that is generated for a second block based on the first hash algorithm and matches the first fingerprint, determining whether there is a third fingerprint, in the fingerprint database, that is generated for the second block based on a second hash algorithm. The techniques further involve: if it is determined that the third fingerprint exists in the fingerprint database, generating a fourth fingerprint for the first block based on the second hash algorithm; and determining whether the first block and the second block are duplicate by comparing the third fingerprint and the fourth fingerprint. Such techniques can effectively reduce the overhead of identifying duplicate data blocks in data deduplication.

Abstract: A method, computer program product, and computing system for processing, using a storage node, one or more updates to one or more metadata pages of a multi-node storage system. The one or more updates may be stored in one or more data containers in a cache memory system of the storage node, thus defining an active working set of data containers. Flushing ownership for each data container of the active working set may be assigned to one of the storage nodes based upon an assigned flushing ownership for each data container of a frozen working set and a number of updates within the frozen working set processed by each storage node, thus defining an assigned flushing storage node for each data container of the active working set. The one or more updates may be flushed, using the assigned flushing storage node, to a storage array.

Abstract: A method, computer program product, and computing system for defining one or more user data portions and at least two reserved portions of a solid-state drive (SSD). An operating mode of the SSD may be determined. One or more of the at least two reserved portions of the SSD may be utilized based upon, at least in part, the operating mode of the SSD.

Abstract: Techniques lock a storage area in a storage system including a first storage node and a second storage node. Such techniques involve adjusting a value of at least one of a first counter at the first node and a second counter at the second node in response to receiving a data access request for the storage area at at least one of the first node and the second node. Such techniques further involve allocating a lock flag to the first node in response to a ratio of the value of the first counter to the value of the second counter being greater than a first threshold, the lock flag indicating that the storage area is locked by the first node. Accordingly, storage resources required by nodes that are accessed more frequently in statistics are effectively reduced, and the efficiency of applying stripe lock reduction are improved.

Abstract: Techniques for accessing data involve reading data from at least one disk among a plurality of disks. Such techniques further involve detecting whether a lookup table stored on a memory is empty, where the lookup table stores information indicating data loss. Such techniques further involve comparing, in response to the lookup table not being empty, data read information associated with the read data with table items in the lookup table to determine whether there is a table item in the lookup table that matches the data read information. Such techniques further involve sending, in response to determining that there is a table item that matches the data read information, the information indicating data loss. Such a technique improve the efficiency of data access, reduces the complexity of the system and the power consumption of the system, and improves the performance of the system.

Abstract: An integrated circuit product includes a first layer of insulating material including a first insulating material. The first layer of insulating material is positioned above a device layer of a semiconductor substrate. The first layer of insulating material has a lowermost surface positioned above an uppermost surface of a gate of a transistor in a device layer of a semiconductor substrate. The device layer includes transistors. A metallization blocking structure is positioned in an opening in the first layer of insulating material. The metallization blocking structure has a lowermost surface above the uppermost surface of the gate and includes a second insulating material that is different from the first insulating material. The metallization blocking structure includes a second insulating material that is different from the first insulating material. A metallization trench is defined in the first layer of insulating material on opposite sides of the metallization blocking structure.

Abstract: A method, computer program product, and computing system for executing a plurality of IO traces on a storage system. At least one vertical flow and at least one horizontal flow associated with the at least one vertical flow may be defined for the plurality of IO traces. A hierarchical representation of the plurality of IO traces may be generated with the at least one vertical flow and the at least one horizontal flow associated with the at least one vertical flow defined for the plurality of IO traces.

Abstract: Method and apparatus for improved and efficient spacer assisted lithography-etch-lithography etch (SALELE) processes that utilize a spin-on-material layer, where the spin-on-material layer fills gaps between spacers to protect line-end to line-end spaces created by a cut shape. The method and structures also include a final resist layer with varying critical dimensions (CDs). The use of the spin-on-material enables back end of line (BEOL) metal designs with continuous line-end to line-end spacing above a minimum that can be patterned with a cut mask and spacer only process.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product for data processing.

Abstract: A method, computer program product, and computing system for defining a normal IO write mode for writing data to a storage system, the normal IO writing mode including: writing the data to a cache memory system, writing the data to a journal, in response to writing the data to the journal, sending an acknowledgment signal to a host device, and writing the data from the cache memory system to a storage array. A request may be received to enter a testing IO write mode. In response to receiving the request, the data may be written to the cache memory system. The writing of the data to the journal may be bypassed. The acknowledgment signal may be sent to the host device in response to writing the data to the cache memory system. The data may be written from the cache memory system to the storage array.

Abstract: A method, computer program product, and computing system for defining a normal IO write mode for writing data to a storage system including: writing the data to a cache memory system of a first storage node, writing the data to a journal of the first storage node, sending a notification concerning the data to a second storage node, writing one or more metadata entries concerning the data to a journal of the second storage node, sending an acknowledgment signal to the host device, and writing the data to the storage array. A request may be received to enter a testing IO write mode. In response to receiving the request, the data may be written to the cache memory system. The writing of the data to the journal may be bypassed. The acknowledgment signal may be sent to the host device. The data may be written to the storage array.