Western Digital Technologies, Inc.

Hgst Netherlands, B.v.

S-tec Corporation

Kanishk Rastogi

Anand Mitra

Sanoj Kizhakkekara Unnikrishnan

Anurag Agarwal

Prasad Joshi

Embodiments of the present disclosure provide a memory-efficient mechanism for identifying memory blocks with a low wear count. More particularly, embodiments of the present disclosure provide a mechanism for identifying a memory block whose wear count is within the bottom p % of all wear counts associated with memory blocks in a storage system. If a memory controller performs the garbage collection operation on a memory block whose wear count is within the bottom p % of all wear counts, then the memory controller is expected to utilize the remaining memory blocks (e.g., memory blocks whose wear count is within the upper (100-p) % of all wear counts) efficiently and level the wear count of at least the remaining memory blocks.

Wear leveling in solid state devices

Embodiments of the present disclosure provide a memory-efficient mechanism for identifying memory blocks with a low wear count. More particularly, embodiments of the present disclosure provide a mechanism for identifying a memory block whose wear count is within the bottom p % of all wear counts associated with memory blocks in a storage system. If a memory controller performs the garbage collection operation on a memory block whose wear count is within the bottom p % of all wear counts, then the memory controller is expected to utilize the remaining memory blocks (e.g., memory blocks whose wear count is within the upper (100&#x2212;p) % of all wear counts) efficiently and level the wear count of at least the remaining memory blocks.

Systems and methods for caching data from a plurality of virtual machines may comprise detecting, using a computer processor executing cache management software, initiation of migration of a cached virtual machine from a first virtualization platform to a second virtualization platform, disabling caching for the virtual machine on the first virtualization platform, detecting completion of the migration of the virtual machine to the second virtualization platform, and enabling caching for the virtual machine on the second virtualization platform.

System and method for caching virtual machine data

Embodiments of the present disclosure provide a memory-efficient mechanism for identifying memory blocks with a low wear count. More particularly, embodiments of the present disclosure provide a mechanism for identifying a memory block whose wear count is within the bottom p % of all wear counts associated with memory blocks in a storage system. If a memory controller always performs the garbage collection operation on a memory block whose wear count is within the bottom p % of all wear counts, then the memory controller is expected to utilize the remaining memory blocks (e.g., memory blocks whose wear count is within the upper (100-p) % of all wear counts) efficiently and level the wear count of at least the remaining memory blocks.

The present disclosure relates to apparatus, systems, and methods that implement a less-recently-used data eviction mechanism for identifying a memory block of a cache for eviction. The less-recently-used mechanism can achieve a similar functionality as the least-recently-used data eviction mechanism, but at a lower memory requirement. A memory controller can implement the less-recently-used data eviction mechanism by selecting a memory block and determining whether the memory block is one of the less-recently-used memory blocks. If so, the memory controller can evict data in the selected memory block; if not, the memory controller can continue to select other memory blocks until the memory controller selects one of the less-recently-used memory blocks.

Apparatus, systems, and methods for providing a memory efficient cache

Embodiments of the present disclosure provides a memory-efficient mechanism for identifying memory blocks with a low wear count. More particularly, embodiments of the present disclosure provides a mechanism for identifying a memory block whose wear count is within the bottom p % of all wear counts associated with memory blocks in a storage system. If a memory controller always performs the garbage collection operation on a memory block whose wear count is within the bottom p % of all wear counts, then the memory controller is expected to utilize the remaining memory blocks (e.g., memory blocks whose wear count is within the upper (100&#x2212;p) % of all wear counts) efficiently and level the wear count of at least the remaining memory blocks.

Apparatus, systems, and methods for providing wear leveling in solid state devices

Systems and methods for caching data from a plurality of virtual machines are disclosed. In one particular exemplary embodiment, the systems and methods may be realized as a method for caching data from a plurality of virtual machines. The method may comprise detecting, using a computer processor executing cache management software, initiation of migration of a cached virtual machine from a first virtualization platform to a second virtualization platform, disabling caching for the virtual machine on the first virtualization platform, detecting completion of the migration of the virtual machine to the second virtualization platform, and enabling caching for the virtual machine on the second virtualization platform.

Growing community of inventors

Maharashtra, India

Kanishk Rastogi