Hi Yehuda and Sam,
Any suggestion on top of the below issue?

Thanks,
Guang

On Jul 12, 2014, at 12:43 AM, Guang Yang <yguan...@outlook.com> wrote:

> Hi Loic,
> I opened an issue in terms of a change brought along with EC pool plus 
> radosgw (http://tracker.ceph.com/issues/8625), in our test cluster, we 
> observed a large number of empty files in OSD and the root cause is that for 
> head object from radosgw, there are a couple of transactions coming together, 
> including create 0~0, setxattr, writefull, as EC bring the concept of the 
> object generation, the create transaction will first create an object and the 
> following write full transition will be taken as an update and rename the 
> original empty file to a generation and create/write a new file. As a result, 
> we observed quite some empty files.
> 
> There is an bug tracking the effort to remove those files with generation and 
> is pending to be back port to firefly, that could definitely help our use 
> case, however, I am also wondering if there is any room to improve for such 
> case so that those empty files would not be generated in the first place 
> (change might be at radosgw side).
> 
> Any suggestion is welcomed.
> 
> Thanks,
> Guang

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