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From "Tomaz Muraus (JIRA)" <>
Subject [jira] [Commented] (LIBCLOUD-378) S3 uploads fail on small iterators
Date Tue, 03 Sep 2013 11:45:51 GMT


Tomaz Muraus commented on LIBCLOUD-378:

(Dunno if you have noticed, but the tests failed -
Build notifications go to
> S3 uploads fail on small iterators
> ----------------------------------
>                 Key: LIBCLOUD-378
>                 URL:
>             Project: Libcloud
>          Issue Type: Bug
>          Components: Storage
>            Reporter: John Carr
>            Assignee: Mahendra M
>         Attachments: LIBCLOUD-378.diff
> I wrote a small script that uploaded the output of a buildbot job and then updated an
XML file. The large binary blob worked fine. However the XML file failed.
> I was using the driver.upload_object_via_stream(iterator=StringIO.StringIO(somexml))
style as in the docs.
> Looking at the LIBCLOUD_DEBUG output the driver was using the S3 multi-part upload API
and making a new "part" for each line - so every 7 bytes or so - but the minimum size for
a part upload was 5mb.
> (I don't know if the first part is allowed to be less than 5mb if the entire upload is
less than 5mb).
> I am working around this by forcing multi-part uploads off.

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