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[Xen-users] Reply-To: Re: Buffered IO?

  • To: "Fajar A. Nugraha" <list@xxxxxxxxx>, xen-users@xxxxxxxxxxxxx
  • From: inge85@xxxxxx
  • Date: Sun, 18 Mar 2012 23:08:22 +0100 (CET)
  • Delivery-date: Sun, 18 Mar 2012 22:09:33 +0000
  • Importance: normal
  • List-id: Xen user discussion <xen-users.lists.xen.org>
  • Sensitivity: Normal

Am 18.03.2012 22:41, schrieb Fajar A. Nugraha:
On Sun, Mar 18, 2012 at 10:49 PM, <inge85@xxxxxx> wrote:

i read something about buffered IO in some hypervisors. So most
hypervisors bufferes all disk operations and after a while take the cpu to
execute all operations as one block. Is this the standard behavior of xen

I didn't found any information about that. Is there any
possiblity to de-/activate it?
I don't think so.

If you use file:/ (which is not recommended), then you'd get buffered
I/O. For everything else (including phy:/ and tap:/), you should get
unbuffered I/O.

Thanks for your Reply, but I don't understand what you mean with file:/, phy:/ and tap:/. Can you explain please or give me some internet links?


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