Patents by Inventor Arieh Don

Arieh Don 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).

  • Patent number: 11032373
    Abstract: An apparatus comprises at least one processing device that is configured to control delivery of input-output operations from a host device to a storage system over selected ones of a plurality of paths through a network, wherein the paths are associated with respective initiator-target pairs, the initiators being implemented on the host device and the targets being implemented on the storage system. The at least one processing device is further configured to identify a particular one of the initiators that comprises multiple virtual initiators having respective virtual identifiers, to determine a negotiated rate of the particular initiator, to determine a negotiated rate of a corresponding one of the targets, and to limit amounts of bandwidth utilized by the multiple virtual initiators in communicating with the corresponding target based at least in part on the negotiated rate of the particular initiator and the negotiated rate of the corresponding target.
    Type: Grant
    Filed: October 12, 2020
    Date of Patent: June 8, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Sanjib Mallick, Vinay G. Rao, Krishna Deepak Nuthakki, Arieh Don
  • Publication number: 20210157744
    Abstract: Techniques for processing I/O operations may include: issuing, by a process of an application on a host, an I/O operation; determining, by a driver on the host, that the I/O operation is a read operation directed to a logical device used as a log to log writes performed by the application, wherein the read operation reads first data stored at one or more logical addresses of the logical device; storing, by the driver, an I/O flag in the I/O operation, wherein the I/O flag has a first flag value denoting an expected read frequency associated with the read operation; sending the I/O operation from the host to the data storage system; and performing first processing of the I/O operation on the data storage system, wherein said first processing includes using the first flag value in connection with caching the first data in a cache of the data storage system.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 27, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: GABRIEL BENHANOKH, Sanjib Mallick, Arieh Don
  • Publication number: 20210157740
    Abstract: A distributed cache is managed. In some embodiments, only a subset of a plurality of processing nodes may be designated as cache managers that manage the cache access history of a logical area, including having an exclusive right to control the eviction of data from cache objects of the logical area. In such embodiments, all of the processing nodes may collect cache access information, and communicate the cache access information to the cache managers. Some of the processing nodes that are not cache managers may collect cache access information from a plurality of the other non-cache managers. Each such processing node may combine this communicated cache access information with the cache access information of the processing node itself, sort the combined information per cache manager, and send the resulting sorted cache access information to the respective cache managers. The processing nodes may be arranged in a cache management hierarchy.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 27, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Gabriel Benhanokh, Arieh Don
  • Publication number: 20210157660
    Abstract: Techniques for memory management may include: allocating, from an allocation pool, buffers for logs used by processing cores; recording messages in the logs for the processing cores; responsive to filling a first buffer included in a first log used to record messages for a first of the plurality of processing cores, allocating a second buffer of the allocation pool for the first log; adding the second buffer to the first list of buffers for the first log; and adding the first buffer, that is included in the first list for the first log, to the allocation pool, wherein after adding the first buffer to the allocation pool, the first buffer is included in the first list of buffers for the first log and also included in the allocation pool. The buffers may be included in a distributed global memory portion of the same computing module as the processing cores.
    Type: Application
    Filed: November 21, 2019
    Publication date: May 27, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Gabriel HERSHKOVITZ, Arieh Don, Michael R. Barber
  • Publication number: 20210157502
    Abstract: An apparatus comprises a host device configured to communicate over a network with first and second storage systems. The host device detects an association in at least one of the first and second storage systems between a source logical storage device of the first storage system and a target logical storage device of the second storage system, and responsive to the detected association, establishes a migration session in the host device for migration of the source logical storage device to the target logical storage device. The host device also obtains an indication from at least one of the first and second storage systems that a corresponding migration session has been activated in the first and second storage systems, and activates the previously-established migration session in the host device based at least in part on the obtained indication for migration of the source logical storage device to the target logical storage device.
    Type: Application
    Filed: November 27, 2019
    Publication date: May 27, 2021
    Inventors: Vinay G. Rao, Sanjib Mallick, Arieh Don
  • Patent number: 11016783
    Abstract: An apparatus comprises a host device configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device is further configured to execute multiple processes that generate input-output (IO) operations for delivery to the storage system. The host device comprises a multi-path input-output (MPIO) driver configured to store for each of one or more of the storage devices information specifying one or more of the processes executing on the host device that are permitted to access that storage device, and for each of at least a subset of the IO operations, to determine the particular storage device to which the IO operation is directed, to identify the process that generated the IO operation, and to control delivery of the IO operation based at least in part on whether or not the stored information indicates that the identified process is permitted to access the particular storage device.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: May 25, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Vinay G. Rao, Sanjib Mallick, Stephen D. Smaldone, Arieh Don
  • Patent number: 11012512
    Abstract: A host device comprises a processor coupled to a memory. The host device is configured, for each of a plurality of initiators of the host device from which write operations are sent to a storage system for processing, to repeatedly send to the storage system a command to obtain from the storage system write pressure information maintained by the storage system for that initiator, and responsive to the write pressure information obtained from the storage system for a corresponding one of the initiators indicating that the corresponding initiator is associated with a write pressure condition, to at least temporarily reduce a rate at which the write operations are sent from the corresponding initiator to the storage system. The operations of repeatedly sending the command, and at least temporarily reducing the rate, are illustratively performed by at least one multi-path input-output driver of a multi-path layer of the host device.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: May 18, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Sanjib Mallick, Krishna Deepak Nuthakki, Arieh Don
  • Patent number: 11003357
    Abstract: Communications between a host system and a storage system may be restricted to a single I/O path, at least temporarily, without manually manipulating physical connections to the host system and/or storage system or manually data structures defining I/O connectivity. In response to a communication to maintain only a first permitted I/O path between a host system and a storage system, I/O communications may be prevented on any I/O paths between the host system and the storage system, except for the first permitted I/O system, without modifying the definition of any permitted I/O paths on the storage system. One or more fields may be included in entries of a data structure that defines permitted I/O paths, the fields specifying whether an I/O path should be allowed to, or prevented from, carry communications between a host system and the storage system, at least temporarily.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 11, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Owen Crowley, Scott Rowlands, Vinay G. Rao, Arieh Don
  • Patent number: 10996864
    Abstract: In response to a target port group state query from a host, the storage arrays that present a replicated volume to the host aggregate port group state of the storage arrays into a single logical target port group state that is provided to the host. The storage array that receives the query from the host may prompt other storage arrays to provide target port group state and combine the responses from all storage arrays. Port IDs may be translated into unique port IDs so that the logical target port group state does not include repeated port IDs.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: May 4, 2021
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Subin George, Shwetha Handral Sridhara, Arieh Don, Mavvureddypatty Senguden Manickavasaham
  • Patent number: 10990567
    Abstract: Techniques for processing I/O operations may include: receiving, an I/O operation including a tag value denoting a process of a database application that issued the I/O operation; determining, in accordance with the tag value, whether the I/O operation is directed to a data file storing content of a database or a log file of recorded operations of the database; and responsive to determining the I/O operation is directed to a data file storing content of the database, performing processing including: determining a current configuration setting of the database that indicates whether the database is configured for use with the database application as an in-memory database; and determining, in accordance with current configuration setting of the database, a first service level objective for the I/O operation, wherein the first service level objective for the I/O operation is a default service level objective or a revised service level objective.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: April 27, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Drew P. Tonnesen, Yaron Dar, Felix Shvaiger, Arieh Don
  • Patent number: 10992532
    Abstract: Techniques for determining connectivity may include: defining predetermined configurations, each including a predetermined zoning configuration of a network and selection criteria indicating when to transition into and activate the predetermined configuration; loading the predetermined configurations; activating a first of the predetermined configurations that includes a first predetermined zoning configuration and first selection criteria; receiving current I/O workload and/or performance information for the network; determining whether the current I/O workload and/or performance information for the network matches second selection criteria associated with a second of the predetermined configurations that is different from the first predetermined configuration currently activated; and responsive to determining the current I/O workload and/or performance information matches the second selection criteria, activating the second predetermined configuration that is different from the first predetermined configura
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: April 27, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Erik P. Smith, Arieh Don
  • Publication number: 20210117095
    Abstract: Systems and methods for replicating data from storage. Snapshots are taken of the volumes in physical storage. The snapshot volumes are exposed to a virtual replication system. Using the snapshots, differential or changed data can be identified. The identified data is then replicated by the virtual replication system to a remove virtual replication system.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 22, 2021
    Inventors: Jehuda Shemer, Arieh Don, Meir Pinhasov, Saar Cohen
  • Publication number: 20210117440
    Abstract: Systems and methods for replicating data from storage. Snapshots are taken on a consistency group of volumes and are stored in snapshot volumes. Changes to the data stored in the volumes are identified from the snapshots and the changes are written to a journal. The journal allows the changes to be replicated to a virtual replication system and a physical replication system. The journal can be replicated to different systems, including physical and virtual systems, by exposing the same journal in different manners.
    Type: Application
    Filed: October 17, 2019
    Publication date: April 22, 2021
    Inventors: Jehuda Shemer, Arieh Don, Saar Cohen
  • Publication number: 20210109658
    Abstract: A host device is configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device comprises a multi-path input-output (MPIO) driver configured to control delivery of input-output (IO) operations from the host device to the storage system over selected ones of a plurality of paths through the network. The MPIO driver is further configured to determine IO processing performance for each of at least a subset of the paths, and to dynamically adjust a path selection algorithm utilized in selecting particular ones of the paths for delivery of the IO operations from the host device to the storage system based at least in part on the determined performance. For example, dynamically adjusting a path selection algorithm illustratively comprises activating a particular one of a plurality of distinct path selection algorithms available to the MPIO driver and/or adjusting one or more parameters of a given path selection algorithm.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 15, 2021
    Inventors: Sanjib Mallick, Vinay G. Rao, Arieh Don
  • Publication number: 20210103530
    Abstract: Techniques for protecting information may include: exposing a logical device of a data storage system to a host, wherein the logical device has an attribute identifying the logical device as a stealth device having accessibility controlled by the data storage system based on commands issued over a control path, wherein the logical device has a mode indicating whether the logical device is accessible to the host; sending, from the host to the data storage system, a write command that writes first data on the logical device when the mode indicates the logical device is accessible to the host; and subsequent to said sending, issuing a command over the control path to the data storage system, wherein the command sets the mode of the logical device to inaccessible indicating the logical device is not accessible to the host.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 8, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Arieh Don, George F. Johnson
  • Patent number: 10970210
    Abstract: Physical storage devices may be managed for spontaneous de-staging from a cache, for example, by determining a background task threshold (UBTT), and controlling one or more physical storage devices to use the UBTT instead of the VBTT in determining when to enter background task mode. The determined UBTT may be less than the VBTT, which may cause the physical storage device to enter into background task mode earlier, which means that background tasks like garbage collection and write leveling may be performed more frequently. An ability to turn on and turn off management of physical storage devices for spontaneous de-staging of a cache may be provided. It may be desirable to turn off physical storage device management for spontaneous de-staging, for example, during peak workload hours, to prevent physical storage devices from entering into background task mode more frequently during certain times.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: April 6, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Gabi Benhanokh, Andrew L. Chanler, Arieh Don
  • Patent number: 10970219
    Abstract: A storage system may maintain a purge counter for one or more logical storage units. When an instruction is received to perform an operation that will modify data across the one or more logical storage units, the purge counter may be incremented. One or more host systems implementing host caching may periodically poll the storage system to determine the purge counter value. When the current value of the purge counter value is different than a previously polled purge counter value recorded on a host system, the host system may purge from its host cache any entries for logical storage units associated with the purge counter. The data storage system may not execute the data modification instruction until it receives acknowledgement from all host systems caching data affected by the modification instruction that the host system has purged any host cache entries corresponding to the LSUs affected by the modification operation.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: April 6, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Michael J. Scharland, Ian Wigmore, Arieh Don
  • Patent number: 10970233
    Abstract: Multiple virtual host ports corresponding to a same physical host port may be determined by or on behalf of a storage system, for example, in response to logging the one or more virtual host ports into the storage system. For one or more virtual host ports, it may be determined whether the virtual host port is connected to a same fabric port as another virtual host port, where a fabric port is a port of a fabric configured to connect to a virtual host port. If two virtual host ports are determined to be connected to a same fabric port, it may be concluded that the two virtual host ports correspond to (e.g., share) a same physical host port. One or more actions may be taken on a storage network based at least in part on a determination that two virtual host ports are sharing a same physical host port.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: April 6, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Owen Crowley, Erik P. Smith, Scott Rowlands, Arieh Don
  • Publication number: 20210096749
    Abstract: Embodiments of the present disclosure relate to traffic class management of NVMe (non-volatile memory express) traffic. One or more input/output (I/O) operations are received at a device interface coupled to one or more storage devices of a storage array. A service level (SL) corresponding to each of the one or more I/O operations is determined. Each of the one or more I/O operations is transmitted to the one or storage devices over a virtual channel of a set of virtual channels based on the determined SL corresponding to each of the one or more I/O operations.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 1, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Owen Martin, Arieh Don
  • Patent number: 10963284
    Abstract: Service level objectives (SLOs) defined for a storage system are associated with virtual machines running on hosts. For an I/O operation for a virtual machine (VM) running on a host system, storage processing is performed on the I/O operation in accordance with the SLO defined for the VM. The same storage system-defined SLOs may be applied to VMs running on multiple host systems. SLOs may be maintained by the storage array and shared with one or more host systems in I/O communication with the storage system. SLOs may be defined using a user interface of a storage system, host system, virtualizer control station or other component of a storage network, and communicated to the storage system, which may maintain the SLOs, and may disseminate them to one or more hosts. The SLOs then may be associated with VMs running on the hosts and tagged to I/O communications corresponding to the VMs.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: March 30, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Adnan Sahin, Owen Martin, Sanjib Mallick, Arieh Don