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[Xen-users] limited number of tap:aio disks - only 64 devices

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Michael Borokhovich <michaelbor@xxxxxxxxx>
  • Date: Tue, 5 Oct 2010 22:54:22 +0200
  • Delivery-date: Tue, 05 Oct 2010 13:55:53 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>


I'm running Debian Lenny and xen. Is there any default limitation on creating tap:aio disks?
I have two tap:aio disks per VM and can run only 32 VMs, i.e., only 64 tap:aio devices. Creating the next device gives:

Error: Device 769 (tap) could not be connected. Setting up the backend failed. See the log files in /var/log/xen/ for details.

On other server we run Debian Etch and there are more than 120 VMs are running (240 tap:aio devices).

Thanks in advance,

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