Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support

[Abhijit Dey]

+ Venky

Sent from my iPhone

> On Oct 25, 2016, at 7:07 AM, Ketan Nilangekar <address@hidden> wrote:
> 
> We are able to derive significant performance from the qemu block driver as 
> compared to nbd/iscsi/nfs. We have prototyped nfs and nbd based io tap in the 
> past and the performance of qemu block driver is significantly better. Hence 
> we would like to go with the vxhs driver for now.
> 
> Ketan
> 
> 
>> On Oct 24, 2016, at 4:24 PM, Paolo Bonzini <address@hidden> wrote:
>> 
>> 
>> 
>>> On 20/10/2016 03:31, Ketan Nilangekar wrote:
>>> This way the failover logic will be completely out of qemu address
>>> space. We are considering use of some of our proprietary
>>> clustering/monitoring services to implement service failover.
>> 
>> Are you implementing a different protocol just for the sake of QEMU, in
>> other words, and forwarding from that protocol to your proprietary code?
>> 
>> If that is what you are doing, you don't need at all a vxhs driver in
>> QEMU.  Just implement NBD or iSCSI on your side, QEMU already has
>> drivers for that.
>> 
>> Paolo