| 主权项 |
1. A method for enabling end-to-end compression when performing host-based replication (HBR), the method comprising:
intercepting, by a hypervisor running on a first host system at a primary site, I/O write requests that originate from a virtual machine (VM) configured to be replicated via HBR, the I/O write requests being destined for a virtual disk (VMDK) of the VM; tracking, by the hypervisor, VMDK file blocks that are modified by the I/O write requests; retrieving, by the hypervisor from a storage tier at the primary site, hash values corresponding to VMDK file blocks that have been modified during a most recent recovery point objective (RPO) interval; comparing, by the hypervisor, the retrieved hash values with a list of hash values corresponding to VMDK file blocks already sent to a secondary site; for each retrieved hash value that is in the list of hash values, transmitting, by the hypervisor, the retrieved hash value to the secondary site without transmitting the VMDK file block corresponding to the retrieved hash value; and for each retrieved hash value that is not in the list of hash values:
retrieving, by the hypervisor, the VMDK file block corresponding to the retrieved hash value from the storage tier at the primary site;compressing, by the hypervisor, the retrieved VMDK file block; andtransmitting, by the hypervisor, the compressed VMDK file block to the secondary site. |
