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Yueh-Hsuan Chiang d4d338de33 Add timeout_hint_us to WriteOptions and introduce Status::TimeOut. 
Summary:
This diff adds timeout_hint_us to WriteOptions.  If it's non-zero, then
1) writes associated with this options MAY be aborted when it has been
  waiting for longer than the specified time.  If an abortion happens,
  associated writes will return Status::TimeOut.
2) the stall time of the associated write caused by flush or compaction
  will be limited by timeout_hint_us.

The default value of timeout_hint_us is 0 (i.e., OFF.)

The statistics of timeout writes will be recorded in WRITE_TIMEDOUT.

Test Plan:
export ROCKSDB_TESTS=WriteTimeoutAndDelayTest
make db_test
./db_test

Reviewers: igor, ljin, haobo, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D18837
 		2014-07-03 15:47:02 -07:00
..
win reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
README reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
atomic_pointer.h Move the compiler back to 4.8.1 + more small fixes 2013-11-18 11:40:16 -08:00
likely.h cache SuperVersion in thread local storage to avoid mutex lock 2014-02-27 11:38:55 -08:00
port.h Move the compiler back to 4.8.1 + more small fixes 2013-11-18 11:40:16 -08:00
port_example.h db_bench cleanup 2014-04-08 11:21:09 -07:00
port_posix.cc Add timeout_hint_us to WriteOptions and introduce Status::TimeOut. 2014-07-03 15:47:02 -07:00
port_posix.h Add TimedWait() API to CondVar. 2014-07-03 10:22:08 -07:00
stack_trace.cc Better stack trace in MAC 2014-04-25 09:50:51 -04:00
stack_trace.h Print out stack trace in mac, too 2014-04-23 09:11:35 -04:00

README 

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_posix.h for an example of what must be provided in a platform
specific header file.