QEMU-Storage-Daemon and libblkio: Exploring New Shores for the QE...
summary
qemu-storage-daemon moves the QEMU block layer into a separate process to provide qemu-storage-daemon exports (NBD, FUSE, vhost-user-blk, vhost-vdpa), enable background block jobs while VMs are down, share a single image or hardware device across multiple VMs, and consolidate polling on one IO thread. libblkio is a Rust library with a C API that exposes virtio-blk, vhost-user and vhost-vdpa transports, already driving a slow-path virtio flow; virtio queue passthrough is planned and a vdpa software-device proof-of-concept shows promising results.
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chapters (7)
- 0:00Intro
- 0:25Traditional QE setup
- 2:43QEMUStorageDaemon
- 10:57Block export types
- 14:19libblkio
- 17:22vdpa
- 22:05Summary
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