On 13.10.2014 16:47, Marcus White wrote: > > 1. In what stack is the driver used in that case if QEMU communicates > directly with librados? The qemu process directly communicates with the Ceph cluster via network. It is a "normal" userland process when it comes to the host kernel. > 2. With QEMU-librados I would guess the new kernel targets/LIO would > not work? They give better performance and lower CPU.. There is no SCSI involved here. > 3. Where is the kernel driver used in that case?.. Nowhere. > 4. In QEMU, is it a SCSI device? It is any device type you configure for your guest to see. It can even be an IDE disk. Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin
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