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Hi Adrian ,

Thanks for your explanation ...

About Q2 , manifest question
Is there any audit mechanism to delete segments of failure uploading object?
What if the uploading procedure is been interrupted by user .
As you said , I think the segments still available for accessing .
On the other hand , it means that those segmented objects will keep on disk
in object-server , even though the uploading failure is caused by user him
self.

Is there any approach to remove those segmented objects? or it might waste
some disk space.

Thanks


2012/6/17 Adrian Smith <adrian at 17od.com>

> > Q1: Where's the metadata of an object ?
> It's stored in extended attributes on the filesystem itself. This is
> reason XFS (or other filesystem supporting extended attributes) is
> required.
>
> > Could I find the value?
> Sure. You just need some way of a) identifying the object on disk and,
> b) a means of querying the extended metadata (using for example the
> python xattrs package).
>
> > Q2: What if a large object be interrupted during upload , will the
> manifest objects be deleted?
> Large objects (i.e. those > 5Gb) must be split up client-side and the
> segments uploaded individually. When all the segments are uploaded the
> manifest must then be created by the client. What I'm trying to get at
> is that each segment and even the manifest are completely independent
> objects. A failure during the upload of any one segment has no impact
> on other segments or the manifest.
>
> Adrian
>
>
> On 16 June 2012 09:53, Kuo Hugo <tonytkdk at gmail.com> wrote:
> > Hi folks ,
> >
> > Q1:
> > Where's the metadata of an object ?
> > For example the "X-Object-Manifest". Does it store in inode ?
> > I did not see the matadata "X-Object=Manifest" in container's DB.
> >
> >  Could I find the value?
> >
> > Q2:
> > What if a large object be interrupted during upload , will the manifest
> > objects be deleted?
> > For example ,
> > OBJ1 :200MB
> > I execute $>swift upload con1 OBJ1 -S 1024000
> > I do a force interrupt while send segment 10.
> >
> > I believe that OBJ1 won't live in con1 , what will happen to the rest
> > manifest objects?
> >
> > Those objects seems still live in con1_segments container. Is there any
> > mechanism to audit OBJ1 and delete those manifest objects ?
> >
> >
> >
> > --
> > +Hugo Kuo+
> > tonytkdk at gmail.com
> > +886 935004793
> >
> >
> > _______________________________________________
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>



-- 
+Hugo Kuo+
tonytkdk at gmail.com
+ <tonytkdk at gmail.com>886 935004793
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