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Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Verita
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support |
Date: |
Tue, 25 Oct 2016 13:01:48 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 25/10/2016 07:07, Ketan Nilangekar 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.
Is this still true with failover implemented outside QEMU (which
requires I/O to be proxied, if I'm not mistaken)? What does the benefit
come from if so, is it the threaded backend and performing multiple
connections to the same server?
Paolo
> 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
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Stefan Hajnoczi, 2016/10/03
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Ketan Nilangekar, 2016/10/19
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Paolo Bonzini, 2016/10/24
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Ketan Nilangekar, 2016/10/25
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Abhijit Dey, 2016/10/25
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Ketan Nilangekar, 2016/10/25
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Paolo Bonzini, 2016/10/25
- Message not available
- Message not available
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Ketan Nilangekar, 2016/10/26
- Re: [Qemu-devel] [PATCH v7 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support, Abhijit Dey, 2016/10/25