[PATCH 0/3] support appending AIO writes

[Sergey Meirovich]

Hi Christoph,

Thanks a lot! Applied your patches on top of 3.13.1 and they indeed
make a huge difference.


Append AIO

chunk size           w/o patches                               with patches
===================================================
4k               6.8834 Mb/sec 1762.15 IOps      31.542 Mb/sec 8074.75 IOps
8k               15.321 Mb/sec 1961.12 IOps      62.873 Mb/sec 8047.71 IOps
16k             28.257 Mb/sec 1808.46 IOps      139.35 Mb/sec 8918.45 IOps


On 4 February 2014 19:24, Christoph Hellwig <hch at infradead.org> wrote:
> At least XFS can support appending AIO writes easily, and Sergey has
> demonstrated a use case for them.
>
> I've not done any performance testing myself, but ensured that xfstests
> already exercises the code path.