Emc IP Holding Company LLC

Emc Corporation

Excelero Storage Ltd.

Nvidia Corporation

Kirill Shoikhet

Assaf Natanzon

Yaniv Romem

Omri Mann

Ofer Oshri

Renen Hallak

Zvi Schneider

Tal Ben-Moshe

Saar Cohen

Niko Farhi

Vladimir Shveidel

Anton Kucherov

Amitai Alkalay

Shahar Frank

Erez Webman

Eldad Zinger

Boris Glimcher

Kobi Luz

Ido Halevi

David Krakov

Yaron Segev

Gilad Braunschvig

Eli Dorfman

Irit Yadin-Lempel

Daniel Herman Shmulyan

Alexandr Veprinsky

Anestis Panidis

James S Jackson

Vladimir Kleiner

Roman Vainbrand

Irit Yadin Lempel

Noa Cohen

Amir Miron

Phil Love

Example embodiments of the present invention relate and a method and an apparatus for double hashing. The method including receiving a hash signature, including a short hash handle, for a data block. The method then includes determining a bucket with which the hash signature should be associated and associating the hash signature with the bucket.

Using double hashing schema to reduce short hash handle collisions and improve memory allocation in content-addressable storage systems

A system and method for improving network storage accessibility, the method including: sending at least a first request for a data block to be sent from a storage device to a client device over a network connection; determining if the network is congested; initiating a client-specific buffer when it is determined that the network is congested, wherein the requested data block is stored in the client-specific buffer; and sending at least a second request for the data block stored within the client-specific buffer to be sent to the client device.

System and method for improving network storage accessibility

A method for performing host based read cache for storage area networks (SANs) supporting Non-Volatile Memory Express over Fabrics (NVMeF) with validation. The method includes upon a first read operation from a client system of a storage array, receiving metadata with a read response regarding location of data subject to the read operation. The method also includes performing, by the client system, direct NVMeF reads from a namespace offset from the metadata. The direct NVMeF reads bypass a software stack of the storage array. The method further includes upon receiving a data block at the client system, using a signature from the metadata to perform validation on the data.

Host based read cache for san supporting NVMEF with E2E validation

An aspect of performing dual splitting functions in a data replication system include receiving an I/O from a host computer. The host computer includes a first splitter configured to perform control path functions. An aspect also includes adding, via the first splitter, metadata for the I/O to a backlog at the host computer, and sending the I/O to a storage array. The storage array includes a second splitter configured to perform data path functions. An aspect further includes receiving, by the storage array, the I/O from the host computer, and sending, via the second splitter, the I/O to at least one storage device of the storage array and to a data protection appliance (DPA). The control path functions include tracking I/Os and maintaining backlogs including the backlog at the host computer, and the data path functions include mirroring operations in the storage array.

Dual-splitter for high performance replication

A system and method for improving multi-core processor access to storages, the method including: assigning a unique memory space within a memory to each of a plurality of processor cores; initiating a shared queue pair (QP), comprising a shared send queue and a shared receive queue, between the plurality of processor cores and at least a storage, wherein the shared queue is accessible by the plurality of processor cores; sending an instruction on the shared send queue from a first core of the plurality of processor cores to the storage, the instruction comprising an interrupt destination on a memory space assigned to the first core; and receiving an interrupt at the interrupt destination from the storage in response to the instruction, wherein the interrupt is generated for the first core.

System and method for improved storage access in multi core system

A system and method for improved remote direct memory access (RDMA) for multi-host network interface controllers (NIC), the method including: allocating a first key to a first host, the first key corresponding to a first address of a memory device of the first host; and allocating the first key to a second host, wherein the second host is an RDMA NIC (rNIC) configured to offload at least a portion of storage operations from the first host.

System and method for improved RDMA techniques for multi-host network interface controllers

A storage system comprising a plurality of storage devices and an associated storage controller. The plurality of storage devices are configured to store data blocks distributed across the plurality of storage devices in a plurality of data stripes. The plurality of data stripes comprise a first set of data stripes and a second set of data stripes. The storage controller is configured to receive data associated with at least one input-output request and to store the received data sequentially in at least one data stripe of the first set of data stripes. The controller is further configured to determine whether or not an amount of data stored in the first set of data stripes is greater than a threshold amount of data and in response to determining that the amount of data stored in the first set of data stripes is greater than the threshold amount of data, to destage the at least one data stripe of the first set of data stripes to the second set of data stripes.

Write folding mechanism using reusable shared striping in a storage system

A system and method for improved redundancy in storage devices are disclosed. The method includes receiving a first data block for writing to a storage device; writing the first block to a journal connected with the storage device; associating a first logical address of a group of logical addresses of the journal with a first physical address of the storage; associating the first physical address to an additional second logical address of the storage device, the second logical address not of the group of logical addresses of the journal; and disassociating the first physical address from the first logical address, in response to associating the first physical address with the additional second logical address.

Networked storage redundancy scheme

A system and method for comparing mirrored storage devices. The method includes: selecting, from a storage slice of a first storage device and at least a second storage device, corresponding storage blocks that are not trimmed blocks, wherein trimmed blocks are blocks within a storage device marked for erasure; comparing the corresponding storage blocks such that a non-trimmed block of the first storage device is compared to a corresponding non-trimmed block of the second storage device to determine which storage blocks do not match; and performing a recovery operation between the non-trimmed block of the first storage device and a non-matching corresponding first non-trimmed block of the second storage device.

System and method for efficient comparison of mirrored storage devices

Described herein are embodiments of a process for efficiently allocating RAID stripes across an array of disks (e.g., SSDs). In some embodiments, the process can be used to allocate RAID stripes across a 'heterogeneous' storage array (i.e., an array of different sized disks). Also described herein are embodiments of a storage system that utilize said processing.

Data protection in a heterogeneous random access storage array

A memory management system for a thinly provisioned memory volume in which a relatively larger virtual address range of virtual address blocks is mapped to a relatively smaller physical memory comprising physical memory blocks via a mapping table containing entries only for addresses of the physical memory blocks containing data. The memory management system comprises a snapshot provision unit to take a given snapshot of the memory volume at a given time, the snapshot comprising a mapping table and memory values of the volume, the mapping table and memory values comprising entries only for addresses of the physical memory containing data. The snapshot is managed on the same thin provisioning basis as the volume itself, and the system is particularly suitable for RAM type memory disks.

Snapshot mechanism

A computer program product, system, and method for receiving an I/O from a host; at a first splitter, adding metadata for the I/O to a backlog; and at a second splitter, sending the I/O to both a storage array and to a data protection appliance (DPA). In some embodiments, the first splitter is located at the host and both the DPA and the second splitter is located within the storage array.

A storage system comprises a storage array in operable communication with and responsive to instructions from a host. The storage array comprises a logical unit (LU), a privileged zone, a data protection appliance (DPA), and an intermediary device. The privileged zone is configured within the storage array and permits at least one predetermined process to have access to the LU. The DPA is configured to operate within the privileged zone. The intermediary device is in operable communication with the host, LU, and DPA and is configured to receive read and write instructions from the DPA and to ensure that I/O's passing through the intermediary device to at least one of the LU and the DPA, in response to the reads and writes, are formatted to a first predetermined standard, for at least one of the LU and the DPA.

Optimized data replication using special NVME protocol and running in a friendly zone of storage array

Described embodiments provide methods and systems for tracking performance of a storage system including one or more system resources. One or more threads may be generated to operate the storage system. Each of the one or more threads may be associated with one of a plurality of tasks of the storage system. When an operating state of one of the one or more threads is changed, one or more performance counters of the storage system may be updated. A performance snapshot may be generated by capturing a state of the tasks associated with the threads and the performance counters.

Growing community of inventors

Raanana, Israel

Kirill Shoikhet