Public bug reported: Using libvirt and Xen, nova is using "tap" (Xen 4.0) and "tap2" (Xen > 4.0) for the disk driver.
According to the Xen documentation and ML, the usage of qdisk is preferred against blktap2 [1]. [1] http://lists.xen.org/archives/html/xen-devel/2013-08/msg02633.html Moreover, libxenlight (xl, libxl) is the replacement of xend (xm) from Xen >= 4.2. According to the disk configuration documentation for xl [2], the device driver "(...) should not be specified, in which case libxl will automatically determine the most suitable backend." [2] http://xenbits.xen.org/docs/unstable/misc/xl-disk-configuration.txt ** Affects: nova Importance: Undecided Assignee: Alvaro Lopez (aloga) Status: In Progress ** Tags: libvirt xen ** Changed in: nova Status: New => In Progress ** Changed in: nova Assignee: (unassigned) => Alvaro Lopez (aloga) -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1326238 Title: libvirt: use qdisk instead of blktap for Xen Status in OpenStack Compute (Nova): In Progress Bug description: Using libvirt and Xen, nova is using "tap" (Xen 4.0) and "tap2" (Xen > 4.0) for the disk driver. According to the Xen documentation and ML, the usage of qdisk is preferred against blktap2 [1]. [1] http://lists.xen.org/archives/html/xen-devel/2013-08/msg02633.html Moreover, libxenlight (xl, libxl) is the replacement of xend (xm) from Xen >= 4.2. According to the disk configuration documentation for xl [2], the device driver "(...) should not be specified, in which case libxl will automatically determine the most suitable backend." [2] http://xenbits.xen.org/docs/unstable/misc/xl-disk- configuration.txt To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1326238/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp