Patents by Inventor Zvi Schneider

Zvi Schneider has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240053920
    Abstract: A memory controller stores data comprising a plurality of data blocks in a first memory tier by data striping data on data drives of a first drive type. The memory controller determines a first parity for at least one data stripe of a plurality of data stripes, stores the first parity in one of data drives of the first drive type, determines a plurality of second parities for the at least one data stripe of the plurality of data stripes, and stores the second parities in a second memory tier.
    Type: Application
    Filed: October 25, 2023
    Publication date: February 15, 2024
    Inventors: Zvi Schneider, Dor Shmoish, Assaf Natanzon
  • Publication number: 20230153005
    Abstract: A block storage device, for data compression is configured to, in a first operating phase, if it is determined, by the block storage device, that a data block is to be written to a large block storage area of the block storage device, determine if the data block can be de-duplicated. If the data block cannot be de-duplicated, the block storage device stores the data block using large block compression.
    Type: Application
    Filed: January 19, 2023
    Publication date: May 18, 2023
    Inventors: Zvi Schneider, Assaf Natanzon
  • Patent number: 11392551
    Abstract: A storage system in one embodiment comprises a plurality of storage devices and a storage controller. The storage controller is configured to receive information indicating whether target data is one of a non-deduplicatable type of data and a deduplicatable type of data. Responsive to the information indicating that the target data is of the deduplicatable type, the storage controller is configured to utilize a content-based mapping generated based on a content of the target data to identify a corresponding physical address for storing the target data. Responsive to the information indicating that the target data is of the non-deduplicatable type, the storage controller is configured to utilize an address-based mapping generated based on a logical address associated with the target data to identify a corresponding physical address for storing the target data.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: July 19, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Assaf Natanzon, Zvi Schneider, Amitai Alkalay
  • Patent number: 11381400
    Abstract: 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.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: July 5, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Kirill Shoikhet, Gilad Braunschvig, Eldad Zinger, Kobi Luz, Zvi Schneider
  • Patent number: 11327834
    Abstract: In an information processing system including a set of data storage devices for storing data blocks arranged in respective columns on each data storage device and rows across the set of data storage devices to form at least one data stripe, and a set of parity storage devices for storing parity blocks computed via one or more parity operations based on the data blocks of the at least one data stripe, at least one of the data storage devices includes a processing device configured to: receive from the information processing system an instruction to perform at least a portion of a parity operation; perform the portion of the parity operation; and send a result of the performed portion of the parity operation to the information processing system, wherein the result is useable by the information processing system for performing another portion of the parity operation.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 10, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Zvi Schneider, Amitai Alkalay, Assaf Natanzon
  • Patent number: 11204716
    Abstract: A storage system comprises a plurality of enclosures and a storage controller. Each enclosure comprises at least one processing device and a plurality of drives configured in accordance with a redundant array of independent disks (RAID) arrangement. The storage controller obtains data pages associated with an input-output request, provides the data pages to a processing device of a given enclosure, and issues a command to the processing device to perform at least one operation based at least in part on the data pages. The processing device of the given enclosure receives the data pages from the storage controller, generates compressed data pages based at least in part on the received data pages, stores one or more of the compressed data pages on the plurality of drives according to the RAID arrangement and returns information associated with the storage of the compressed data pages to the storage controller.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: December 21, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Boris Glimcher, Amitai Alkalay, Zvi Schneider
  • Patent number: 11144247
    Abstract: An aspect includes reading a first page and a corresponding second page from a storage device. The first page specifies a metadata page stored in persistent storage and having logical addresses of metadata, and the second page associates logical block addresses (LBAs) with corresponding physical locations for the metadata. An aspect also includes reading data for a RAID stripe according to an associated physical offset in the second page, accessing a stripe counter from the second page, and comparing the stripe counter from the second page to a stripe counter held in memory. Upon determining the stripe counter from the second page is not the same, a third page is loaded, and a physical location of the data is read from the third page that provides a hash value of the data and corresponding physical location. The physical location of the data is accessed, and the second page is updated.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: October 12, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Zvi Schneider, Amitai Alkalay, Assaf Natanzon
  • Patent number: 11115490
    Abstract: 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.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: September 7, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Boris Glimcher, Zvi Schneider, Amitai Alkalay, Kirill Shoikhet
  • Patent number: 11106810
    Abstract: An apparatus, in one example, comprises a storage system configured to perform one or more deduplication operations on encrypted datasets received for a plurality of tenants and store at least a portion of the encrypted datasets, the datasets having been encrypted for respective ones of the plurality of tenants using a common encryption key. The apparatus further comprises a cryptographic module associated with the storage system, the cryptographic module configured to, in response to a request to access an encrypted dataset stored by the storage system corresponding to a given one of the plurality of tenants, further encrypt the encrypted dataset using a tenant encryption key associated with the given one of the plurality of tenants. The storage system is further configured to send the further encrypted dataset to the given one of the plurality of tenants that requested access.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: August 31, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Assaf Natanzon, Udi Shemer, Zvi Schneider, Amitai Alkalay
  • Patent number: 11100135
    Abstract: In one aspect, data replication processes include setting a minimum snap set creation interval, a maximum snap set creation interval, and a recovery time threshold (RTT). An aspect further includes creating snap sets during a synchronous replication process based on the snap set creation intervals and the RTT. The snap set creation further includes monitoring an amount of data changes since the last snap set creation, monitoring throughput statistics between a source and target system, and estimating an amount of time to replicate the data changes to the target system based on the data changes and throughput statistics. Upon determining the time to replicate the data changes reaches the RTT and the time since the last snap set creation passes the minimum interval, the snap set creation includes creating a next snap set, storing the next snap set at the source, and replicating the next snap set at the target.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: August 24, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Xiangping Chen, Zvi Schneider
  • Patent number: 11093158
    Abstract: A method is disclosed for storing data in a storage system, comprising: receiving a write request at the storage system; detecting whether the write request is associated with one of a deduplication tier or a non-deduplication tier of the storage system; when the write request is associated with the deduplication tier of the storage system, storing data associated with the write request in the first portion of the volume and updating a first mapping structure to map the first LBA to at least one first hash digest that is generated based on the data; and when the write request is associated with the non-deduplication tier of the storage system, storing data associated with the write request in the second portion of the volume and updating the first mapping structure to map the first LBA to a second hash digest that is generated based on a second LBA.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: August 17, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Assaf Natanzon, Zvi Schneider, Amitai Alkalay
  • Patent number: 11055188
    Abstract: A storage system comprises a plurality of enclosures and a storage controller. Each enclosure comprises at least one processing device and a plurality of drives configured in accordance with a redundant array of independent disks (RAID) arrangement. The storage controller obtains an input-output request to read a target data page and issues a command to the at least one processing device of a given enclosure. Responsive to receiving the command, the at least one processing device of the given enclosure obtains data pages associated with a given stripe from the plurality of drives of the given enclosure. The at least one processing device rebuilds the given stripe based at least in part on the obtained data pages, obtains the target data page from the rebuilt given stripe and provides the obtained target data page to the storage controller.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: July 6, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Amitai Alkalay, Boris Glimcher, Zvi Schneider, Aric Hadav
  • Patent number: 11048722
    Abstract: In one aspect, performance optimization for data persistency in asynchronous replication setups includes creating at a source site of a data replication system, a snapshot (snapshot N) of input/output (IO) requests as part of a replication cycle, computing a delta of snapshot N and a previously created snapshot (snapshot N?1), and transmitting the delta to a target site of the data replication storage system. An aspect further includes storing, at the target site, snapshot N?1 during transmission of the delta, and caching the delta to a non-persistent storage device. Upon determining an occurrence of a loss event at the target site, a further aspect includes transmitting, by the target site, a request to retransmit the delta, retransmitting, by the source site, the delta to the target site, caching the delta to the non-persistent storage device until successful transmission of the delta, and committing the transmitted delta to permanent storage.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: June 29, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Zvi Schneider, David Meiri
  • Patent number: 11003542
    Abstract: Described embodiments provide systems and methods for operating a storage system wherein an online consistent system checkpoint is generated. The checkpoint contains a point in time image of a system and is used for providing recovery of the system to a known good state. In one embodiment the checkpoint includes volume configuration data, logical volume space, a plurality of layers of metadata, and physical data storage.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: May 11, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Anton Kucherov, Zvi Schneider, Xiangping Chen, Ying Hu, Felix Shvaiger
  • Patent number: 11003629
    Abstract: An apparatus in one embodiment comprises at least one processing device comprising a processor coupled to a memory. The at least one processing device is configured to obtain a file and to determine a type of the file. A structure of the file may be determined based at least in part on the determined type of the file and at least one location in the file may be identified based at least in part on the determined structure. The file may be divided at the identified at least one location into a plurality of chunks and the plurality of chunks may be provided to a block deduplication module of a storage system where the block deduplication module is configured to perform a deduplication process based at least in part on the plurality of chunks.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 11, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Amitai Alkalay, Zvi Schneider, Assaf Natanzon
  • Patent number: 10990297
    Abstract: An apparatus comprises a storage system having storage devices and an associated storage controller. In conjunction with initiation of a checkpoint, the storage controller sets a checkpoint started flag for the checkpoint, marks user data pages and metadata pages for write operations already entered in a write journal of the storage system as of the setting of the checkpoint started flag as checkpoint pages, and marks user data pages and metadata pages for new write operations entered in the write journal after the setting of the checkpoint started flag as non-checkpoint pages by altering information used to generate signatures for respective ones of the metadata pages. Metadata pages characterizing the same user data pages subject to write operations at different times thereby have different signatures depending on whether or not the checkpoint started flag was set when its corresponding write operation was entered in the write journal.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: April 27, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Ying Hu, Anton Kucherov, Zvi Schneider, Vladimir Shveidel, Xiangping Chen, Felix Shvaiger
  • Patent number: 10990479
    Abstract: An apparatus comprises at least one processing device comprising a processor coupled to a memory. The processing device is configured to select a stripe column size for stripes of a data storage system, to determine a first compress block size for a first one of the stripes based on compressibility of data to be stored, to select a first prime number for computing parity blocks for the first stripe and a first number of sub-stripes for splitting stripe columns of the first stripe, to generate metadata specifying the first compress block size, the first prime number and the first number of sub-stripes for the first stripe, and to store data compressed using the first compress block size in the first stripe. The first prime number and first number of sub-stripes for the first stripe is different than a second prime number and second number of sub-stripes for a second stripe.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: April 27, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Zvi Schneider, Marcelo Taube, Lior Kamran, Alex Soukhman, David Krakov
  • Patent number: 10956366
    Abstract: An aspect of dynamic physical capacity allocation in an unbalanced content-addressable storage system includes initiating a scale up for a storage cluster. An aspect further includes determining a target number of hash-to-physical-location-on-disk (h2d) slices to be assigned to each data module (D module), and reassigning h2d slices assigned to D modules having greater than the target number of h2d slices to D modules having less h2d slices than the target number.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: March 23, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Svetlana Kronrod, Zvi Schneider, Anton Kucherov
  • Patent number: 10942654
    Abstract: An apparatus in one embodiment comprises at least one processing device comprising a processor coupled to a memory. The processing device is configured to detect an error relating to storage of a given data page in a first storage system, and to send a message to at least one additional storage system, the message containing a hash digest of the given data page. The processing device is further configured to receive from the additional storage system responsive to the message a recovery data page identified by the additional storage system as having the same hash digest as the given data page. The recovery data page received from the additional storage system is verified by computing a hash digest of the recovery data page and comparing the computed hash digest to the hash digest of the given data page. Separate instances of the message containing the hash digest of the given data page may be sent to each of a plurality of additional storage systems.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: March 9, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: David Meiri, Zvi Schneider, Anton Kucherov
  • Patent number: 10922135
    Abstract: A method is disclosed for dynamic multitasking in a storage system, the storage system including a first storage server configured to execute a first I/O service process and one or more second storage servers, the method comprising: detecting a first event for triggering a context switch; transmitting to each of the second storage servers an instruction to stop transmitting internal I/O requests to the first I/O service process, the instruction including an identifier corresponding to the first I/O service process, the identifier being arranged to distinguish the first I/O service process from other first I/O service processes that are executed by the first storage server concurrently with the first I/O service process; deactivating the first I/O service process by pausing a frontend of the first I/O service process, and pausing one or more I/O providers of the first I/O service process; and executing a first context switch between the first I/O service process and a second process.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: February 16, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Lior Kamran, Amitai Alkalay, Zvi Schneider