公开(公告)号：US20210382629A1

公开(公告)日：2021-12-09

申请号：US17411506

申请日：2021-08-25

Applicant: EMC IP Holding Company, LLC

Inventor： Adnan Sahin ,  Michael Scharland ,  Robert DeCrescenzo ,  Steven T. McClure ,  James Marriott Guyer ,  Jason J. Duquette

IPC: G06F3/06

Abstract: A method, computer program product, and computer system for receiving, by a computing device, an I/O request. It may be identified whether the I/O request is eligible for handling via a first path without also requiring handling via a second path. If the I/O request is eligible, the I/O request may be processed via the first path on a host I/O stack without processing the I/O request via the second path on a storage array I/O stack. If the I/O request is ineligible, the I/O request may be processed via the first path on the host

公开(公告)号：US10942821B1

公开(公告)日：2021-03-09

申请号：US16176136

申请日：2018-10-31

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Ajay Potnis ,  Kiran Halwai ,  Adnan Sahin

IPC: G06F16/30 ,  G06F11/14 ,  G06F3/06

Abstract: A method of dynamic binding and unbinding thin logical storage volumes to data volumes stored in a storage array includes creating a snapshot copy of a user file system, storing the snapshot copy of the user file system in a data volume in the storage array, and binding a logical storage volume to the data volume. The logical storage volume is then used, by a snapshot file system, to access the data volume. If the data volume is not accessed for a period of time, the logical storage volume is unbound from the data volume while maintaining the snapshot copy of the user file system in the data volume. If an access event later occurs on the data volume, a second logical storage volume is bound to the data volume and used by the snapshot file system to access the data volume in connection with the access event.

公开(公告)号：US20200210334A1

公开(公告)日：2020-07-02

申请号：US16816540

申请日：2020-03-12

Applicant: EMC IP Holding Company LLC

Inventor： Adnan Sahin ,  Amnon Naamad

IPC: G06F12/0802 ,  G06F12/0862

Abstract: A method of cache hit ratio simulation using a partial data set includes determining a set of sampled addresses, the set of sampled addresses being a subset of all addresses of a storage system of a storage environment. The method further includes using, by a simulation engine, a cache management algorithm to determine a cache hit ratio of the sampled addresses, the cache management algorithm being also used by a cache manager to place a portion of the addresses of the storage system into cache during a runtime operation. The method further includes determining a quantity of memory access operations to frequently accessed addresses in the set of sampled addresses, and correcting, by the simulation engine, the cache hit ratio of the sampled addresses based on the quantity of memory access operations to the frequently accessed addresses in the set of sampled addresses. The simulation also handles sequential operations accurately.

公开(公告)号：US11520486B2

公开(公告)日：2022-12-06

申请号：US16687791

申请日：2019-11-19

Applicant: EMC IP Holding Company LLC

Inventor： Adnan Sahin ,  Douglas E. LeCrone ,  Ian Wigmore

IPC: G06F3/06 ,  G06F11/14

Abstract: A backup data storage system includes non-volatile memory units, a disk interface coupled to at least some of the non-volatile memory units, a connection component that facilitates exchanging data with the backup data storage system, and a smart network interface controller, coupled to the disk interface and the connection component to provide tape emulation to a host coupled to the backup data storage system. The disk interface, the connection component, and the smart network interface controller may be coupled using a PCIe bus. Tape data written to the backup storage device may be stored on the non-volatile memory units. A processor coupled to the smart network interface controller and the disk interface may receive the data from the smart network interface controller and may provide the data to the disk interface to store the data on the non-volatile memory units. The connection component may be a FICON connection component.

公开(公告)号：US11347414B2

公开(公告)日：2022-05-31

申请号：US16662185

申请日：2019-10-24

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Paulo Ferreira ,  Adriana Prado ,  Pablo Da Silva ,  Ron Arnan ,  Hagay Dagan ,  Adnan Sahin

IPC: G06F3/06 ,  G06N5/04 ,  G06N20/00

Abstract: Telemetry data gathered from active deployed SAN nodes is used to create a machine learning model that predicts storage system performance, e.g. in terms of response time. The telemetry data may be filtered to remove outlier values and less relevant information before creating the training dataset. Engineered features may be created that include types of data that are not present in the telemetry data. For example, data types from the telemetry data may be combined to create engineered features that are more relevant than the individual data types. The engineered features are included in the training dataset. The machine learning model may be used to test possible configurations for a planned SAN node based on expected workload and performance requirements. Outputted data may include satisfactory configurations for a planned storage system.

公开(公告)号：US11086548B2

公开(公告)日：2021-08-10

申请号：US16263197

申请日：2019-01-31

Applicant: EMC IP Holding Company LLC

Inventor： Dustin Hunt Zentz ,  Owen Martin ,  Adnan Sahin

IPC: G06F3/06 ,  G06F12/02

Abstract: Moving data among a plurality of non-volatile storage devices of a storage device includes accumulating credits at each of a plurality of periodic intervals for separate portions of the devices, wherein the credits correspond to a wear rating for each of the devices, reducing credits for each of the portions at each of the periodic intervals based on an amount of data written to each of the portions during each of the intervals, on the wear rating for each of the devices, and on a percent life used for the devices, and moving data from a first one of the portions having a relatively low amount of credits to a second one of the portions having a relatively high amount of credits. The devices may be solid state drives. The wear rating may be a drive writes per day rating provided by a manufacture of the solid state drive.

公开(公告)号：US20210173586A1

公开(公告)日：2021-06-10

申请号：US16705307

申请日：2019-12-06

Applicant: EMC IP Holding Company LLC

Inventor： Matthew H. Fredette ,  Jonathan I. Krasner ,  Jean-Pierre Bono ,  Chakib Ouarraoui ,  Adnan Sahin

IPC: G06F3/06 ,  G06F12/10

Abstract: A method for managing data includes obtaining, by a hypervisor on a host computing device, a write request for storing first data, and in response to the write request: identifying a first set of memory segments associated with the first data using a memory mapper, wherein the first set of memory segments is associated with a memory device, making a first determination that the memory device is local to the host computing device, and in response to the first determination: storing the first data in the first set of memory segments.

公开(公告)号：US20210149567A1

公开(公告)日：2021-05-20

申请号：US16687791

申请日：2019-11-19

Applicant: EMC IP Holding Company LLC

Inventor： Adnan Sahin ,  Douglas E. LeCrone ,  Ian Wigmore

IPC: G06F3/06 ,  G06F11/14

Abstract: A backup data storage system includes non-volatile memory units, a disk interface coupled to at least some of the non-volatile memory units, a connection component that facilitates exchanging data with the backup data storage system, and a smart network interface controller, coupled to the disk interface and the connection component to provide tape emulation to a host coupled to the backup data storage system. The disk interface, the connection component, and the smart network interface controller may be coupled using a PCIe bus. Tape data written to the backup storage device may be stored on the non-volatile memory units. A processor coupled to the smart network interface controller and the disk interface may receive the data from the smart network interface controller and may provide the data to the disk interface to store the data on the non-volatile memory units. The connection component may be a FICON connection component.

公开(公告)号：US20210097032A1

公开(公告)日：2021-04-01

申请号：US16585100

申请日：2019-09-27

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Adnan Sahin ,  Ajay Potnis

IPC: G06F16/182 ,  G06F16/176 ,  G06F16/17

Abstract: A storage cluster includes a group of data nodes having concurrent access to a shared filesystem. The shared filesystem is assigned to a first TLU of a first storage group. Other filesystems of the data nodes associated with the shared filesystem, such as snapshot copies of the shared filesystems and the root/configuration filesystems of the data nodes are assigned to TLUs of a second set of storage groups. The first storage group and the second set of storage groups are all associated with a Remote Data Replication (RDR) group for the storage cluster. An RDR facility is created between a storage array storing the shared filesystem and a backup storage array. The concurrently accessed shared filesystem and the filesystems of all data nodes accessing shared filesystem are replicated on the RDR facility to the backup storage array to enable failover of the storage cluster between sites.

公开(公告)号：US10963165B2

公开(公告)日：2021-03-30

申请号：US16263050

申请日：2019-01-31

Applicant: EMC IP Holding Company LLC

Inventor： Adnan Sahin ,  Owen Martin ,  Sanjib Mallick ,  Arieh Don

IPC: G06F3/06 ,  G06F9/455

Abstract: Service level objectives (SLOs) defined for a storage system are associated with VMs 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.