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<DIV><FONT size=2 face=Arial>@Antonio:</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>The problem is that the VMs don't have the network
performance that have the host (virtio-net is for excellence the best), by a
great difference, virtio.net never will have the performance of a host. Now is
in development a new technology: " virtio-blk dataplane" and "virto-net
dataplane", ( <A
href="https://www.google.com/search?q=%22virtio-block-data-plane%22&ie=utf-8&oe=utf-8#q=%22virtio-net+dataplane%22">https://www.google.com/search?q=%22virtio-block-data-plane%22&ie=utf-8&oe=utf-8#q=%22virtio-net+dataplane%22</A>),
but it by now don't support "live migration", HA, and other
features.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>I have configured DRBD to level of Host, and i have
HA to level of VM with great results (database, several RAID 10 in SAS 15K,
etc.., and obviously with a lower yield compared to a Host), but if you not need
great speed for transfer of data with the network DRBD, i believe that will work
DRBD well for you in the VMs.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Best regards</FONT></DIV>
<DIV><FONT size=2 face=Arial>Cesar</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=joel@securelink.com href="mailto:joel@securelink.com">Joel N.
Burleson-Davis</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=brain@click.com.py
href="mailto:brain@click.com.py">Cesar Peschiera</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A
title=antoniofernandez@fabergroup.es
href="mailto:antoniofernandez@fabergroup.es">Antonio Fernández Pérez</A> ; <A
title=drbd-user@lists.linbit.com
href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 17, 2015 12:55
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [DRBD-user] DRBD on virtual
machine</DIV>
<DIV><BR></DIV>I've run DRBD inside virtual guests as well as on a virtual
hosts - both without issues. It depends on your use case. <BR><BR>It sounded
to me like Antonio was planning on running DRBD in two VMs that he has to do
P-to-V migrations on.<BR><BR>
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<TD>-- <BR>Cheers,<BR><BR>Joel Burleson-Davis<BR>tel:
512-637-8700<BR>mob: 503-707-2065<BR><A
href="http://www.securelink.com/people/joel">www.securelink.com/people/joel</A><BR><BR><IMG
border=0 align=bottom
src="https://ci3.googleusercontent.com/proxy/E9Zg7aEqpSaZ-KpKJe-9Q3WGmH3Y7AoDoQ0mEaHp6Ri9EKTiK5e8k7WGHOqaQaITPc9uJ-6iH7H9CGpraHJglpxBcr9YlEo7d8M1UTLo6Kc5sANF=s0-d-e1-ft#http://www.securelink.com/skins/_master/images/header-logo.png"><BR><B>secure
networks for remote support</B>
<BR><BR></TD></TR></TBODY></TABLE>-----Original Message-----<B>From</B>: Cesar
Peschiera <<A
href="mailto:brain@click.com.py">brain@click.com.py</A>><BR><B>To</B>: Joel
N. Burleson-Davis <<A
href="mailto:joel@securelink.com">joel@securelink.com</A>>, Antonio
Fernández Pérez <<A
href="mailto:Antonio%20%3d%3fISO-8859-1%3fQ%3fFern%3dE1ndez_P%3dE9rez%3f%3d%20%3cantoniofernandez@fabergroup.es%3e">antoniofernandez@fabergroup.es</A>><BR><B>Cc</B>:
<A
href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</A><BR><B>Subject</B>:
Re: [DRBD-user] DRBD on virtual machine<BR><B>Date</B>: Tue, 17 Feb 2015
12:21:38 -0300<BR><BR> <FONT size=2>But DRBD must be running in the host, not
in the guest (VM).</FONT> <FONT size=2>---</FONT> <FONT
size=2>Cesar</FONT>
<BLOCKQUOTE>----- Original Message ----- </BLOCKQUOTE>
<BLOCKQUOTE><B>From:</B> <A href="mailto:joel@securelink.com">Joel N.
Burleson-Davis</A> </BLOCKQUOTE>
<BLOCKQUOTE><B>To:</B> <A
href="mailto:antoniofernandez@fabergroup.es">Antonio Fernández Pérez</A>
</BLOCKQUOTE>
<BLOCKQUOTE><B>Cc:</B> <A
href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</A>
</BLOCKQUOTE>
<BLOCKQUOTE><B>Sent:</B> Tuesday, February 17, 2015 11:39 AM </BLOCKQUOTE>
<BLOCKQUOTE><B>Subject:</B> Re: [DRBD-user] DRBD on virtual machine
</BLOCKQUOTE>
<BLOCKQUOTE><BR><BR></BLOCKQUOTE>
<BLOCKQUOTE>I don't know of a reason you wouldn't want to run DRBD on a VM.
I've had no issues doing so.<BR><BR>
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<TD>-- <BR>Cheers,<BR><BR>Joel Burleson-Davis<BR>tel:
512-637-8700<BR>mob: 503-707-2065<BR><A
href="http://www.securelink.com/people/joel">www.securelink.com/people/joel</A><BR><BR><IMG
border=0 align=bottom
src="https://ci3.googleusercontent.com/proxy/E9Zg7aEqpSaZ-KpKJe-9Q3WGmH3Y7AoDoQ0mEaHp6Ri9EKTiK5e8k7WGHOqaQaITPc9uJ-6iH7H9CGpraHJglpxBcr9YlEo7d8M1UTLo6Kc5sANF=s0-d-e1-ft#http://www.securelink.com/skins/_master/images/header-logo.png"><BR><B>secure
networks for remote support</B>
<BR><BR><BR></TD></TR></TBODY></TABLE>-----Original Message-----<B>From</B>:
Antonio Fernández Pérez <<A
href="mailto:antoniofernandez@fabergroup.es">antoniofernandez@fabergroup.es</A>><BR><B>To</B>:
<A
href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</A><BR><B>Subject</B>:
[DRBD-user] DRBD on virtual machine<BR><B>Date</B>: Tue, 17 Feb 2015
14:55:02 +0100<BR><BR>Hi list:<BR><BR>I need your help ... I have to
migrate two physical servers with DRBD+Pacemaker+Corosync to virtual
machines. On the new set of virtual machines I will can manage more hardware
resources but, do you have any reason advise against using DRBD on virtual
machines?<BR><BR>I hope your answers.<BR><BR>Thanks in
advance.<BR><BR>Regards,<BR><BR>Antonio. <PRE>_______________________________________________
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