公开(公告)号：US20190278524A1

公开(公告)日：2019-09-12

申请号：US15955760

申请日：2018-04-18

Applicant: VMWARE, INC.

Inventor： RAHUL DEV ,  GAUTHAM SWAMY ,  PRASANNA AITHAL

IPC: G06F3/06 ,  G06F9/50 ,  G06F9/455

Abstract: Example methods are provided to perform persistent reservation emulation in a shared virtual storage environment that includes a first host supporting a first node and a second host supporting a second node. One example method may comprise detecting a command issued by a first node to command issued by a first node to update information relating to a reservation or registration associated with a virtual disk, and updating persistent reservation information associated with the virtual disk to indicate that the command has been issued by the first node. The method may also comprise determining that the second node either has acknowledged the updated persistent reservation information, or has not acknowledged the updated persistent reservation information within a time interval. The method may further comprise updating the persistent reservation information based on the command.

公开(公告)号：US20190278494A1

公开(公告)日：2019-09-12

申请号：US15955694

申请日：2018-04-18

Applicant: VMWARE, INC.

Inventor： RAHUL DEV ,  Gautham Swamy

IPC: G06F3/06 ,  G06F13/16

Abstract: Example methods are provided for a first host to perform Input Output (I/O) fencing in a shared virtual storage environment. One example method may comprise determining that is required to fence off a second node from a first virtual disk, and obtaining persistent reservation information associated with the first virtual disk. The persistent reservation information may include a first key associated with a first path between a first node and the first virtual disk, and a second key associated with a second path between the second node and the first virtual disk. The method may also comprise identifying the second key associated with the second path; and blocking I/O access by the second node to the first virtual disk using the second key associated with the second path, thereby fencing off the second node from the first virtual disk.