Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Cesar Peschiera
What services do you want to have in the server?, and At peak times, how many speed of write do you need? (If you don't need speed for write of blocks of disk and network, DRBD can be installed in the guest). Also you can search by Internet the benchmarks of virtio-block and virtio-net. for ex

Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Antonio Fernández Pérez
Hi list: ​​Firstly thanks for your replies. Supposed to be worse performance using VM but, is so dramatic? Now I have a physical architecture with HA and I plan migrate these to VM with another hosting provider. I think that with RAM, CPU and storage there will be no problem ... Do you need more

Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Cesar Peschiera
@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 datapl

Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Joel N. Burleson-Davis
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

Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Cesar Peschiera
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@lists.linbit.com Sent: Tuesday, February 17, 2015 11:39 AM Subject: Re: [DRBD-user] DRBD on virtual machine

Re: [DRBD-user] DRBD on virtual machine

2015-02-17 Thread Joel N. Burleson-Davis
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 To: drbd

[DRBD-user] DRBD on virtual machine

2015-02-17 Thread Antonio Fernández Pérez
​​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. Th