公开(公告)号：US11010351B1

公开(公告)日：2021-05-18

申请号：US16176164

申请日：2018-10-31

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Ajay Potnis ,  Amit Dharmadhikari ,  Kiran Halwai ,  Adnan Sahin

IPC: G06F16/00 ,  G06F16/182 ,  G06F9/455 ,  G06F16/27 ,  G06F16/11 ,  G06F16/188

Abstract: A first Software Defined Network Attached Storage (SDNAS) process on a first storage system forwards snapshots of a file system provided by the first storage system to a second SDNAS process on a second storage system. The snapshots are forwarded by the first SDNAS process on an Internet Protocol (IP) network, to enable the first and second SDNAS processes to maintain redundant access to data of the file system without requiring the first storage system and second storage system to be interoperable. The initial snapshot includes a full version of the file system and subsequent snapshots include changed portions of the file system. Where the snapshot identifies changed portions at the extent level of granularity, the first SDNAS process subdivides the extents into sub-blocks, and only transmits changed sub-blocks of the extents on the IP network.

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：US10831618B1

公开(公告)日：2020-11-10

申请号：US16263230

申请日：2019-01-31

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Ajay Potnis ,  Kiran Halwai ,  Amit Dharmadhikari ,  Rashmi Shashidhar ,  Pavan YM

IPC: G06F11/14 ,  H04L29/08 ,  G06F9/455 ,  G06F16/11

Abstract: A storage system includes a storage array having physical storage resources, a Software Defined Network Attached Storage (SDNAS) process running in an emulation on the storage system, a user file system having user file system data stored in the storage array that is accessed by the SDNAS process via a first Thin Logical Unit (TLU) storage volume mounted on an emulation operating system, a snapshot copy of the user file system stored in the storage array, and control logic. In some embodiments, the control logic is configured to associate a logical view of the snapshot copy of the user file system to a second TLU, mount the second TLU on the emulation operating system as a snapshot copy file system, and replay pending transactions and sub-transactions of the user file system on the snapshot copy file system to bring the snapshot copy file system to a stable state.