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Fix SimpleWriteTimeoutTest 

Summary:
In column family's SanitizeOptions() [1], we make sure that min_write_buffer_number_to_merge is normal value. However, this test depended on the fact that setting min_write_buffer_number_to_merge to be bigger than max_write_buffer_number will cause a deadlock. I'm not sure how it worked before.

This diff fixes it by scheduling sleeping background task, which will actually block any attempts of flushing.

[1] https://github.com/facebook/rocksdb/blob/master/db/column_family.cc#L104

Test Plan: the test works now

Reviewers: yhchiang, sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23103
This commit is contained in:
Igor Canadi 2014-09-09 11:50:05 -07:00
parent 06d986252a
commit 0a42295a24
1 changed files with 16 additions and 2 deletions
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18
db/db_test.cc
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@ -7832,25 +7832,39 @@ TEST(DBTest, FIFOCompactionTest) {
}
TEST(DBTest, SimpleWriteTimeoutTest) {
// Block compaction thread, which will also block the flushes because
// max_background_flushes == 0, so flushes are getting executed by the
// compaction thread
env_->SetBackgroundThreads(1, Env::LOW);
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
Options options;
options.env = env_;
options.create_if_missing = true;
options.write_buffer_size = 100000;
options.max_background_flushes = 0;
options.max_write_buffer_number = 2;
options.min_write_buffer_number_to_merge = 3;
options.max_total_wal_size = std::numeric_limits<uint64_t>::max();
WriteOptions write_opt = WriteOptions();
write_opt.timeout_hint_us = 0;
DestroyAndReopen(&options);
// fill the two write buffer
// fill the two write buffers
ASSERT_OK(Put(Key(1), Key(1) + std::string(100000, 'v'), write_opt));
ASSERT_OK(Put(Key(2), Key(2) + std::string(100000, 'v'), write_opt));
// this will switch the previous memtable, but will not cause block because
// DelayWrite() is called before MakeRoomForWrite()
// TODO(icanadi) remove this as part of https://reviews.facebook.net/D23067
ASSERT_OK(Put(Key(3), Key(3), write_opt));
// As the only two write buffers are full in this moment, the third
// Put is expected to be timed-out.
write_opt.timeout_hint_us = 50;
ASSERT_TRUE(
Put(Key(3), Key(3) + std::string(100000, 'v'), write_opt).IsTimedOut());
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
}
// Multi-threaded Timeout Test