Re: Set object mtime

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On 25 March 2013 19:38, Sage Weil <sage@xxxxxxxxxxx> wrote:
> On Mon, 25 Mar 2013, Damien Churchill wrote:
>> On 25 March 2013 19:18, Wido den Hollander <wido@xxxxxxxx> wrote:
>> > On 03/25/2013 12:27 PM, Damien Churchill wrote:
>> >>
>> >> Does anyone know if it's possible to set an objects mtime at all in RADOS?
>> >>
>> >
>> > You mean with a specific operation while not modifying the content of the
>> > object?
>> >
>> > I checked the rados API, but I couldn't find any method which allows you to
>> > do so.
>>
>> Neither could I. I guess the question should be changed to:
>>
>> How difficult would it be to allow the modification time to be set
>> (including setting it to a time in the past) without changing the
>> object?
>
> The CREATE operation just creates the object if it doesn't exist.  You can
> use that op and set the mtime to whatever you want.  You probably need to
> use the C++ bindings with the ObjectWriteOperation method; I don't think
> there is a standalone call for it (tho one is easily added).
>

Okay thanks! A call in the C API would be handy. I was wanting to look
at creating a tool to sync RADOS between clusters. Is that anything
that's in the development plan already? I noticed the email about the
rbd-diff tool yesterday.
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