Patent ID: 9189339
Filing Date: 2015-11-17
Classification: G06F

Abstract:
1. A method comprising: intercepting an I/O sent by a virtual machine at a first site; sending the I/O to a first data protection appliance (DPA) at the first site; sending I/O metadata to a first service layer at the first site; sending I/O data down the I/O stack after receiving acknowledgement that the I/O metadata arrived at the first service layer; intercepting the I/O at the first service layer; sending the I/O metadata from the first service layer to a second service layer at a second site; and sending I/O data to the second service layer at the second site by ensuring that I/O metadata mirroring between the first site and the second site is completed before I/O data mirroring occurs between the first site and the second site.