Re: [Qemu-devel] [PATCHv2] block: add native support for NFS

[Peter Lieven]

> Am 18.12.2013 um 11:00 schrieb Orit Wasserman <address@hidden>:
> 
>> On 12/18/2013 01:03 AM, Peter Lieven wrote:
>> 
>> 
>>>> Am 17.12.2013 um 18:32 schrieb "Daniel P. Berrange" <address@hidden>:
>>>> 
>>>> On Tue, Dec 17, 2013 at 10:15:25AM +0100, Peter Lieven wrote:
>>>> This patch adds native support for accessing images on NFS shares without
>>>> the requirement to actually mount the entire NFS share on the host.
>>>> 
>>>> NFS Images can simply be specified by an url of the form:
>>>> nfs://<host>/<export>/<filename>
>>>> 
>>>> For example:
>>>> qemu-img create -f qcow2 nfs://10.0.0.1/qemu-images/test.qcow2
>>> 
>>> Does it support other config tunables, eg specifying which
>>> NFS version to use 2/3/4 ? If so will they be available as
>>> URI parameters in the obvious manner ?
>> 
>> currently only v3 is supported by libnfs. what other tunables would you like 
>> to see?
> 
> For live migration we need the sync option (async ignores O_SYNC and O_DIRECT 
> sadly),
> will it be supported? or will it be the default?

the async you see in the libnfs calls refer to the async API. bdrv_flush will 
not return before the nfs server completes the request.

Peter

> 
> Orit
> 
>>> 
>>> Daniel
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>