A memory system includes a memory device suitable for storing data and a controller suitable for determining an operation state of the memory device and carrying out garbage collection to the memory device in response to the operation state. The controller can ignore a first command entered from a host while performing the garbage collection.

A controller for controlling a nonvolatile memory device comprising: a read count table including a plurality of read count data, wherein each of the read count data includes a read count value for one data storage region; a read count address table including a read count address indicating an address of a memory region where the read count data is stored; a flash translation layer (FTL) configured to control an operation of the nonvolatile memory device, and manage the read count table and the read count address table; and a flash interface layer (FIL) configured to control data communication between the FTL and the nonvolatile memory device, and update the read count value based on the read count address when read operation is performed on the data storage region.

A method, a device, and a computer program product for resource scheduling is disclosed. The method includes determining a job initiated by a virtual machine. The job requests to invoke at least one virtual function in a set of virtual functions associated with the virtual machine and each virtual function in the set of virtual functions is configured to utilize an accelerator resource to provide a single type of acceleration service. The method further includes determining, based on a job type of the job, a first accelerator resource allocated to the at least one virtual function. The accelerator resources required by the virtual functions invoked by the job may then be guaranteed, improving the execution efficiency of the job.

A data storage device includes a memory device and a controller coupled to the memory device. The data storage device supports zoned namespace. The controller is configured to maintain a zone timestamp table that includes a corresponding timestamp for each zone and add a timestamp to each garbage collection block of the memory device. The controller is further configured to scan a garbage collection block from a last physical block address (PBA) entry to a first PBA entry, determine a zone timestamp for the scanned PBA entry, and compare the zone timestamp to a timestamp of the garbage collection block. The controller is further configured to create and maintain a zone timestamp table and create and maintain a zone based defragmentation table.

According to one embodiment, a controller writes a first data associated with a write request and a first logical address specified by the write request to a first block. The controller updates a logical-to-physical address translation table such that a first physical address indicating a first storage location in the first block in which the first data is written is associated with the first logical address. In response to receiving an invalidation request for invalidating the first data corresponding to the first logical address, the controller acquires, from the logical-to-physical address translation table, the first physical address, and updates a valid data identifier corresponding to a storage location indicated by the first physical address to a value indicating invalidation.

A storage device includes a nonvolatile semiconductor memory device including a plurality of physical blocks and a memory controller. The memory controller is configured to associate one or more physical blocks to each of a plurality of stream IDs, execute a first command containing a first stream ID received from a host, by storing write data included in the write IO in the one or more physical blocks associated with the first stream ID, and execute a second command containing a second stream ID received from the host, by selecting a first physical block that includes valid data and invalid data, transfer the valid data stored in the first physical block to a second physical block, and associate the first physical block from which the valid data has been transferred, with the second stream ID.

A memory management method includes determining a memory page that needs to be swapped out of a memory, for each memory page that needs to be swapped out, generating, based on the memory page, a work task reclaiming the memory page, and allocating each work task to a dedicated worker thread for execution.

According to one embodiment, a memory system includes a controller which controls garbage collection for preparing one or more free blocks by writing valid data read from N blocks to one or more blocks of less than the N. The controller calculates a performance ratio between writing of data in response to a request from a host device and writing of data for the garbage collection in accordance with a data writable capacity remaining in a nonvolatile memory, calculates an average performance ratio from calculated performance ratios of M generations including a calculated latest performance ratio, and adjusts a performance cycle of the garbage collection by applying one of the calculated latest performance ratio and the calculated average performance ratio.

A storage system and method for automatic data phasing are disclosed. In one embodiment, a storage system is configured to receive, from a host, data to be written in the memory and an indication of an expected lifespan of the data; and determine whether to perform a garbage collection operation on the data based on the expected lifespan of the data. Other embodiments are provided.

A method for heap space management includes, in response to a determination that consumption of a first heap space of an application exceeds a first threshold, determining whether a second heap space of the application after garbage collection is sufficient to accommodate data stored in the first heap space. The method further includes, in response to a determination that the second heap space after the garbage collection is sufficient to accommodate the data, performing the garbage collection on the second heap space. The method further includes storing the data into the second heap space.