Currently some storage technologies like Ceph already have the support of several SCSI interfaces like WRITE SAME and COMPARE AND WRITE, which can be called by QEMU block driver directly. However, QEMU still emulates them at the moment. We work on this by introducing SCSI support into QEMU block layer. This presentation will explain how this support is implemented and the problem it still has.
I'm a cloud software engineer focusing on virtualization and linux kernel in Chinamobile. Currently i'm working on high-performance distributed storage system basing on Ceph and spoke on Cephalocon 2020.
