[sheepdog] [PATCH v4 0/4] sheep: writeback cache semantics in backend store

[Hitoshi Mitake]

(2012/09/07 16:09), Hitoshi Mitake wrote:
> (2012/09/07 16:08), MORITA Kazutaka wrote:
>> At Fri,  7 Sep 2012 14:25:50 +0900,
>> Hitoshi Mitake wrote:
>>>
>>> This patch series implements writeback cache semantics in backend
>>> store of sheep. Current backend store farm and plain_store calls
>>> open() with O_DSYNC, so every object write causes slow disk
>>> access. This patch series try to reduce this overhead with flushing
>>> disk cache with the invocation of SD_OP_FLUSH_VDI instead of every
>>> object write. This strategy can improve performance when a number of
>>> VMs is not so large.
>>>
>>> Hitoshi Mitake (4):
>>>    sheep: change gateway_forward_request() for forwarding requests to
>>>      all other nodes
>>>    sheep: add new operation flush() to store_driver
>>>    sheep: add SD_OP_FLUSH_NODES and SD_OP_FLUSH_PEER for writeback cache
>>>      semantics
>>>    tests: modify usage of -w in 018, 019, 020 for new cache option
>>>
>>>   configure.ac             |    2 +-
>>>   include/internal_proto.h |    2 +
>>>   include/sheep.h          |   13 ++++
>>>   sheep/farm/farm.c        |    1 +
>>>   sheep/gateway.c          |   68 +++++++++++++-------
>>>   sheep/object_cache.c     |   10 ++--
>>>   sheep/ops.c              |   45 +++++++++++--
>>>   sheep/plain_store.c      |   31 +++++++++
>>>   sheep/request.c          |    2 +-
>>>   sheep/sheep.c            |  160
>>> ++++++++++++++++++++++++++++++++++++++--------
>>>   sheep/sheep_priv.h       |   33 ++++++++--
>>>   sheep/store.c            |    9 +--
>>>   tests/018                |    2 +-
>>>   tests/019                |    2 +-
>>>   tests/020                |    2 +-
>>>   15 files changed, 306 insertions(+), 76 deletions(-)
>>
>> Applied, thanks!
>>
>> Can you update a wiki page, too?
>>
>>
>> https://github.com/collie/sheepdog/wiki/Backend-Stores-and-Object-Cache
>>
>
> Sure, I'll update the wiki.
>

I updated the wiki:

https://github.com/collie/sheepdog/wiki/Backend-Stores,-Object-Cache-and-Disk-Cache

My English is so bad. If you have opinions on the change, I'd like to hear.

Thanks,
Hitoshi