[Openstack] [Swift] Object expiration vs DELETE

Morten Møller Riis mmr at gigahost.dk
Thu Oct 10 03:46:28 UTC 2013

Is the swift-object-expirer daemon running?

Mvh / Best regards
Morten Møller Riis
Gigahost ApS
mmr at gigahost.dk

On Oct 10, 2013, at 2:28 PM, Shrinand Javadekar <shrinand at maginatics.com> wrote:

> Hi,
> Objects in a swift container can be deleted by either explicitly deleting them or by setting a expiry timestamp on them. Is there a performance difference between the two? For example, when I want to delete an object, instead of deleting it, can I simply set the X-Delete-After attribute of that object to 0? Is one faster than the other? 
> My guess is that setting the object expiry timestamp may be faster since that would only involve changing the xattrs of the object inode. Delete will require creation of a new version of the object, truncating it to a 0 byte file and renaming it to change the extension to ".ts". Seems like less work is done when object expiration is set.
> To try this out, I tried setting the X-Delete-After attribute using the swift command line client:
> $ swift post -m X-Delete-After: 1 <container-name> <object-name>
> After I did this, when I stat the object, I see the attribute "Meta X-Delete-After: 1". However, the object never got deleted. Any idea what I'm doing wrong?
> -Shri
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