Hi is it possible to access a char device in xenU ? More precisly i have i tape device in a server and i want to share it across my different xenU domains. Any clues ? Matthieu ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> Hi > is it possible to access a char device in xenU ? > More precisly i have i tape device in a server and i want to > share it across > my different xenU domains.No, there''s no generic mechanism for sharing char devices. The way in which it makes sense to multiplex devices between domains is typically very device-secific: With a dvice like a tape you''d presumably only want to let one domain access it at a time, perhaps with a hard interlock as to which tape is in the drive. Fortunately, the bandwidth is pretty low, so it''s probably easiest to setup a network based soloution rather than doing something Xen specific. I presume such daemons already exist (?) Ian ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
Sorry for my late comment on this email ...> > Hi > > is it possible to access a char device in xenU ? > > More precisly i have i tape device in a server and i want to > > share it across > > my different xenU domains. > > No, there''s no generic mechanism for sharing char devices. The way in > which it makes sense to multiplex devices between domains is typically > very device-secific: >Is it possible to make a scsi device invisible from xen0 and visilbe in xenU (i''m not talking of a whole scsi card but just one device on the card) ?> With a dvice like a tape you''d presumably only want to let one domain > access it at a time, perhaps with a hard interlock as to which tape is > in the drive. Fortunately, the bandwidth is pretty low, so it''s probably > easiest to setup a network based soloution rather than doing something > Xen specific. I presume such daemons already exist (?)Sure something like amanda should work ... ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> Is it possible to make a scsi device invisible from xen0 and visilbe in > xenU (i''m not talking of a whole scsi card but just one device on the card) > ?You can''t make it invisible in dom0 but you can export it to a domU using the standard virtual block device configuration. i.e.: ''phy:/dev/sdb,sdb,w'' Cheers, Mark> > With a dvice like a tape you''d presumably only want to let one domain > > access it at a time, perhaps with a hard interlock as to which tape is > > in the drive. Fortunately, the bandwidth is pretty low, so it''s probably > > easiest to setup a network based soloution rather than doing something > > Xen specific. I presume such daemons already exist (?) > > Sure something like amanda should work ... > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xen-devel------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
On February 10, 11:38 pm Mark Williamson <maw48@cl.cam.ac.uk> wrote:> > Is it possible to make a scsi device invisible from xen0 and visilbe > > in xenU (i''m not talking of a whole scsi card but just one device on > > the card) ? > > You can''t make it invisible in dom0 but you can export it to a domU > using the standard virtual block device configuration. i.e.: > > ''phy:/dev/sdb,sdb,w''i was talking about a char device (a dat tape). So the only solution is to hide the whole card and export it into another xenU ... matthieu ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> > ''phy:/dev/sdb,sdb,w'' > > i was talking about a char device (a dat tape). > So the only solution is to hide the whole card and export it into another > xenU ...Ah, sorry. No, we don''t provide virtualisation at the SCSI command layer so you''ll have to either export the whole PCI card or use a network-based solution. My preference would be for the network-based solution unless you have a really strong reason to use PCI exporting. CHeers, Mark ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel