Hi! I'm the author of Vitastor SDS (https://vitastor.io/). My project is an opensource SDS with an architecture similar to Ceph, but simpler and faster - in the terms of latency, it's ~10x faster, it easily reaches 0.1ms T1Q1 latency with NVMe disks.
I have a custom block driver for qemu (block/vitastor.c), currently I package it manually and provide my own QEMU packages. I wanted to ask if I can submit this driver to you to package it upstream? It requires libvitastor_client library to build which is also currently available either in source form or from my repositories, is it fine? And actually, if that's a problem, another option for me would be to use a hypothetical QAPI plugin system if QEMU had one - because, in fact, the only thing which is forcing me to rebuild QEMU is qapi/block-core.json. I have to patch it because, otherwise, the JSON options of my block driver aren't accepted by QEMU. So if there was a way to dynamically load these qapi definitions it would allow me to make compatible *.so block driver builds easily, even though there's no "stable" API as I understand. I'd just need a separate build for every qemu version, but that's not a problem for me :-). Or maybe such thing already exists and I just miss it? What do you think? -- Thanks in advance, Vitaliy Filippov
