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 can improve performance when a number of VMs is not so
large.
Hitoshi Mitake (3):
sheep: change gateway_forward_request() for forwarding requests to
all other nodes
sheep: add new operation flush() to store_driver
sheep: add SD_OP_SYNC_VDI and SD_OP_FLUSH_PEER for writeback cache
semantics
configure.ac | 2 +-
include/internal_proto.h | 2 +
sheep/farm/farm.c | 1 +
sheep/gateway.c | 63 ++++++++++++++++++++---------
sheep/ops.c | 36 ++++++++++++++++-
sheep/plain_store.c | 34 ++++++++++++++++
sheep/sheep.c | 97 ++++++++++++++++++++++++++++++++++++---------
sheep/sheep_priv.h | 14 ++++++-
sheep/store.c | 5 +-
9 files changed, 206 insertions(+), 48 deletions(-)
--
1.7.5.1
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