[sheepdog] vdi object journaling and atomic write

[MORITA Kazutaka]

At Fri, 31 Aug 2012 15:24:21 +0800,
Liu Yuan wrote:
> 
> From the trace we can see that journaling is most time consuming process for
> VDI object write, account almost for 70% (with 3 copies, all 3 nodes on the same box).
> 
> Because we support all or nothing atomic write, do we still need to suppose VDI object
> journeling?

Do you mean store->atomic_put?  It doesn't support partial write.

But it seems that we need a more efficient journaling implementation.

Thanks,

Kazutaka