Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
@Antonio:
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", ( https://www.google.com/search?q=%22virtio-block-data-plane%22&ie=utf-8&oe=utf-8#q=%22virtio-net+dataplane%22), but it by now don't support "live migration", HA, and other features.
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.
Best regards
Cesar
----- Original Message -----
From: Joel N. Burleson-Davis
To: Cesar Peschiera
Cc: Antonio Fernández Pérez ; drbd-user at lists.linbit.com
Sent: Tuesday, February 17, 2015 12:55 PM
Subject: Re: [DRBD-user] DRBD on virtual machine
I've run DRBD inside virtual guests as well as on a virtual hosts - both without issues. It depends on your use case.
It sounded to me like Antonio was planning on running DRBD in two VMs that he has to do P-to-V migrations on.
--
Cheers,
Joel Burleson-Davis
tel: 512-637-8700
mob: 503-707-2065
www.securelink.com/people/joel
secure networks for remote support
-----Original Message-----From: Cesar Peschiera <brain at click.com.py>
To: Joel N. Burleson-Davis <joel at securelink.com>, Antonio Fernández Pérez <antoniofernandez at fabergroup.es>
Cc: drbd-user at lists.linbit.com
Subject: Re: [DRBD-user] DRBD on virtual machine
Date: Tue, 17 Feb 2015 12:21:38 -0300
But DRBD must be running in the host, not in the guest (VM). --- Cesar
----- Original Message -----
From: Joel N. Burleson-Davis
To: Antonio Fernández Pérez
Cc: drbd-user at lists.linbit.com
Sent: Tuesday, February 17, 2015 11:39 AM
Subject: Re: [DRBD-user] DRBD on virtual machine
I don't know of a reason you wouldn't want to run DRBD on a VM. I've had no issues doing so.
--
Cheers,
Joel Burleson-Davis
tel: 512-637-8700
mob: 503-707-2065
www.securelink.com/people/joel
secure networks for remote support
-----Original Message-----From: Antonio Fernández Pérez <antoniofernandez at fabergroup.es>
To: drbd-user at lists.linbit.com
Subject: [DRBD-user] DRBD on virtual machine
Date: Tue, 17 Feb 2015 14:55:02 +0100
Hi list:
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?
I hope your answers.
Thanks in advance.
Regards,
Antonio.
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