Improving the SCSI subsystem lays the ground for a more flexible and scalable virtual storage architecture.
- Name: Paolo Bonzini
- Email: firstname.lastname@example.org
Shortcomings of virtio-blk include a small feature set (requiring frequent updates to both the host and the guests) and limited scalability. Both of these problems can be improved, while preserving virtio-blk's high performance, by basing a next-generation virtual storage architecture on the SCSI command set.
As a prerequisite for implementing the virtio SCSI HBA, several improvements were necessary in the SCSI subsystem of QEMU.
The following improvements were done to the SCSI subsystem:
- Improved (and less buggy) modeling of SCSI requests
- Flexible SCSI addressing (channel/target/LUN)
- Improved consistency with the SCSI specifications (SAM, SPC, SBC)
- Improved support for emulated SCSI CD-ROM drives (MMC)
- Migration support
- git tree (branch scsi-for-anthony)