rocksdb/db/db_tailing_iter_test.cc
Gunnar Kudrjavets 97265f5f14 Fix minor bugs in delete operator, snprintf, and size_t usage
Summary:
List of changes:

1) Fix the snprintf() usage in cases where wrong variable was used to determine the output buffer size.

2) Remove unnecessary checks before calling delete operator.

3) Increase code correctness by using size_t type when getting vector's size.

4) Unify the coding style by removing namespace::std usage at the top of the file to confirm to the majority usage.

5) Fix various lint errors pointed out by 'arc lint'.

Test Plan:
Code review and build:

git diff
make clean
make -j 32 commit-prereq
arc lint

Reviewers: kradhakrishnan, sdong, rven, anthony, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D51849
2015-12-15 15:26:20 -08:00

670 lines
20 KiB
C++

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
// Introduction of SyncPoint effectively disabled building and running this test
// in Release build.
// which is a pity, it is a good test
#if !defined(ROCKSDB_LITE)
#include "db/db_test_util.h"
#include "db/forward_iterator.h"
#include "port/stack_trace.h"
namespace rocksdb {
class DBTestTailingIterator : public DBTestBase {
public:
DBTestTailingIterator() : DBTestBase("/db_tailing_iterator_test") {}
};
TEST_F(DBTestTailingIterator, TailingIteratorSingle) {
ReadOptions read_options;
read_options.tailing = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
iter->SeekToFirst();
ASSERT_TRUE(!iter->Valid());
// add a record and check that iter can see it
ASSERT_OK(db_->Put(WriteOptions(), "mirko", "fodor"));
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "mirko");
iter->Next();
ASSERT_TRUE(!iter->Valid());
}
TEST_F(DBTestTailingIterator, TailingIteratorKeepAdding) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
std::string value(1024, 'a');
const int num_records = 10000;
for (int i = 0; i < num_records; ++i) {
char buf[32];
snprintf(buf, sizeof(buf), "%016d", i);
Slice key(buf, 16);
ASSERT_OK(Put(1, key, value));
iter->Seek(key);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
}
TEST_F(DBTestTailingIterator, TailingIteratorSeekToNext) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
std::unique_ptr<Iterator> itern(db_->NewIterator(read_options, handles_[1]));
std::string value(1024, 'a');
const int num_records = 1000;
for (int i = 1; i < num_records; ++i) {
char buf1[32];
char buf2[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
}
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
if (i == 1) {
itern->SeekToFirst();
} else {
itern->Next();
}
ASSERT_TRUE(itern->Valid());
ASSERT_EQ(itern->key().compare(key), 0);
}
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
for (int i = 2 * num_records; i > 0; --i) {
char buf1[32];
char buf2[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
}
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
}
TEST_F(DBTestTailingIterator, TailingIteratorTrimSeekToNext) {
const uint64_t k150KB = 150 * 1024;
Options options;
options.write_buffer_size = k150KB;
options.max_write_buffer_number = 3;
options.min_write_buffer_number_to_merge = 2;
CreateAndReopenWithCF({"pikachu"}, options);
ReadOptions read_options;
read_options.tailing = true;
int num_iters, deleted_iters;
char bufe[32];
snprintf(bufe, sizeof(bufe), "00b0%016d", 0);
Slice keyu(bufe, 20);
read_options.iterate_upper_bound = &keyu;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
std::unique_ptr<Iterator> itern(db_->NewIterator(read_options, handles_[1]));
std::unique_ptr<Iterator> iterh(db_->NewIterator(read_options, handles_[1]));
std::string value(1024, 'a');
bool file_iters_deleted = false;
bool file_iters_renewed_null = false;
bool file_iters_renewed_copy = false;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"ForwardIterator::SeekInternal:Return", [&](void* arg) {
ForwardIterator* fiter = reinterpret_cast<ForwardIterator*>(arg);
ASSERT_TRUE(!file_iters_deleted ||
fiter->TEST_CheckDeletedIters(&deleted_iters, &num_iters));
});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"ForwardIterator::Next:Return", [&](void* arg) {
ForwardIterator* fiter = reinterpret_cast<ForwardIterator*>(arg);
ASSERT_TRUE(!file_iters_deleted ||
fiter->TEST_CheckDeletedIters(&deleted_iters, &num_iters));
});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"ForwardIterator::RenewIterators:Null",
[&](void* arg) { file_iters_renewed_null = true; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"ForwardIterator::RenewIterators:Copy",
[&](void* arg) { file_iters_renewed_copy = true; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
const int num_records = 1000;
for (int i = 1; i < num_records; ++i) {
char buf1[32];
char buf2[32];
char buf3[32];
char buf4[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
snprintf(buf3, sizeof(buf3), "00b0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
Slice keyn(buf3, 20);
ASSERT_OK(Put(1, keyn, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
if (i == 299) {
file_iters_deleted = true;
}
snprintf(buf4, sizeof(buf4), "00a0%016d", i * 5 / 2);
Slice target(buf4, 20);
iterh->Seek(target);
ASSERT_TRUE(iter->Valid());
for (int j = (i + 1) * 5 / 2; j < i * 5; j += 5) {
iterh->Next();
ASSERT_TRUE(iterh->Valid());
}
if (i == 299) {
file_iters_deleted = false;
}
}
file_iters_deleted = true;
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
ASSERT_LE(num_iters, 1);
if (i == 1) {
itern->SeekToFirst();
} else {
itern->Next();
}
ASSERT_TRUE(itern->Valid());
ASSERT_EQ(itern->key().compare(key), 0);
ASSERT_LE(num_iters, 1);
file_iters_deleted = false;
}
ASSERT_TRUE(file_iters_renewed_null);
ASSERT_TRUE(file_iters_renewed_copy);
iter = 0;
itern = 0;
iterh = 0;
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
table_options.block_cache_compressed = nullptr;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
read_options.read_tier = kBlockCacheTier;
std::unique_ptr<Iterator> iteri(db_->NewIterator(read_options, handles_[1]));
char buf5[32];
snprintf(buf5, sizeof(buf5), "00a0%016d", (num_records / 2) * 5 - 2);
Slice target1(buf5, 20);
iteri->Seek(target1);
ASSERT_TRUE(iteri->status().IsIncomplete());
iteri = 0;
read_options.read_tier = kReadAllTier;
options.table_factory.reset(NewBlockBasedTableFactory());
ReopenWithColumnFamilies({"default", "pikachu"}, options);
iter.reset(db_->NewIterator(read_options, handles_[1]));
for (int i = 2 * num_records; i > 0; --i) {
char buf1[32];
char buf2[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
}
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
}
TEST_F(DBTestTailingIterator, TailingIteratorDeletes) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
// write a single record, read it using the iterator, then delete it
ASSERT_OK(Put(1, "0test", "test"));
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "0test");
ASSERT_OK(Delete(1, "0test"));
// write many more records
const int num_records = 10000;
std::string value(1024, 'A');
for (int i = 0; i < num_records; ++i) {
char buf[32];
snprintf(buf, sizeof(buf), "1%015d", i);
Slice key(buf, 16);
ASSERT_OK(Put(1, key, value));
}
// force a flush to make sure that no records are read from memtable
ASSERT_OK(Flush(1));
// skip "0test"
iter->Next();
// make sure we can read all new records using the existing iterator
int count = 0;
for (; iter->Valid(); iter->Next(), ++count) ;
ASSERT_EQ(count, num_records);
}
TEST_F(DBTestTailingIterator, TailingIteratorPrefixSeek) {
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip,
kSkipNoPrefix);
ReadOptions read_options;
read_options.tailing = true;
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.disable_auto_compactions = true;
options.prefix_extractor.reset(NewFixedPrefixTransform(2));
options.memtable_factory.reset(NewHashSkipListRepFactory(16));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
ASSERT_OK(Put(1, "0101", "test"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "0202", "test"));
// Seek(0102) shouldn't find any records since 0202 has a different prefix
iter->Seek("0102");
ASSERT_TRUE(!iter->Valid());
iter->Seek("0202");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "0202");
iter->Next();
ASSERT_TRUE(!iter->Valid());
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip, 0);
}
TEST_F(DBTestTailingIterator, TailingIteratorIncomplete) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
read_options.read_tier = kBlockCacheTier;
std::string key("key");
std::string value("value");
ASSERT_OK(db_->Put(WriteOptions(), key, value));
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
iter->SeekToFirst();
// we either see the entry or it's not in cache
ASSERT_TRUE(iter->Valid() || iter->status().IsIncomplete());
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
iter->SeekToFirst();
// should still be true after compaction
ASSERT_TRUE(iter->Valid() || iter->status().IsIncomplete());
}
TEST_F(DBTestTailingIterator, TailingIteratorSeekToSame) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.write_buffer_size = 1000;
CreateAndReopenWithCF({"pikachu"}, options);
ReadOptions read_options;
read_options.tailing = true;
const int NROWS = 10000;
// Write rows with keys 00000, 00002, 00004 etc.
for (int i = 0; i < NROWS; ++i) {
char buf[100];
snprintf(buf, sizeof(buf), "%05d", 2*i);
std::string key(buf);
std::string value("value");
ASSERT_OK(db_->Put(WriteOptions(), key, value));
}
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
// Seek to 00001. We expect to find 00002.
std::string start_key = "00001";
iter->Seek(start_key);
ASSERT_TRUE(iter->Valid());
std::string found = iter->key().ToString();
ASSERT_EQ("00002", found);
// Now seek to the same key. The iterator should remain in the same
// position.
iter->Seek(found);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(found, iter->key().ToString());
}
// Sets iterate_upper_bound and verifies that ForwardIterator doesn't call
// Seek() on immutable iterators when target key is >= prev_key and all
// iterators, including the memtable iterator, are over the upper bound.
TEST_F(DBTestTailingIterator, TailingIteratorUpperBound) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
const Slice upper_bound("20", 3);
ReadOptions read_options;
read_options.tailing = true;
read_options.iterate_upper_bound = &upper_bound;
ASSERT_OK(Put(1, "11", "11"));
ASSERT_OK(Put(1, "12", "12"));
ASSERT_OK(Put(1, "22", "22"));
ASSERT_OK(Flush(1)); // flush all those keys to an immutable SST file
// Add another key to the memtable.
ASSERT_OK(Put(1, "21", "21"));
std::unique_ptr<Iterator> it(db_->NewIterator(read_options, handles_[1]));
it->Seek("12");
ASSERT_TRUE(it->Valid());
ASSERT_EQ("12", it->key().ToString());
it->Next();
// Not valid since "21" is over the upper bound.
ASSERT_FALSE(it->Valid());
// This keeps track of the number of times NeedToSeekImmutable() was true.
int immutable_seeks = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"ForwardIterator::SeekInternal:Immutable",
[&](void* arg) { ++immutable_seeks; });
// Seek to 13. This should not require any immutable seeks.
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
it->Seek("13");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_FALSE(it->Valid());
ASSERT_EQ(0, immutable_seeks);
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorSingle) {
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
iter->SeekToFirst();
ASSERT_TRUE(!iter->Valid());
// add a record and check that iter can see it
ASSERT_OK(db_->Put(WriteOptions(), "mirko", "fodor"));
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "mirko");
iter->Next();
ASSERT_TRUE(!iter->Valid());
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorKeepAdding) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
std::string value(1024, 'a');
const int num_records = 10000;
for (int i = 0; i < num_records; ++i) {
char buf[32];
snprintf(buf, sizeof(buf), "%016d", i);
Slice key(buf, 16);
ASSERT_OK(Put(1, key, value));
iter->Seek(key);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorSeekToNext) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
std::string value(1024, 'a');
const int num_records = 1000;
for (int i = 1; i < num_records; ++i) {
char buf1[32];
char buf2[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
}
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
for (int i = 2 * num_records; i > 0; --i) {
char buf1[32];
char buf2[32];
snprintf(buf1, sizeof(buf1), "00a0%016d", i * 5);
Slice key(buf1, 20);
ASSERT_OK(Put(1, key, value));
if (i % 100 == 99) {
ASSERT_OK(Flush(1));
}
snprintf(buf2, sizeof(buf2), "00a0%016d", i * 5 - 2);
Slice target(buf2, 20);
iter->Seek(target);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(key), 0);
}
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorDeletes) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
// write a single record, read it using the iterator, then delete it
ASSERT_OK(Put(1, "0test", "test"));
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "0test");
ASSERT_OK(Delete(1, "0test"));
// write many more records
const int num_records = 10000;
std::string value(1024, 'A');
for (int i = 0; i < num_records; ++i) {
char buf[32];
snprintf(buf, sizeof(buf), "1%015d", i);
Slice key(buf, 16);
ASSERT_OK(Put(1, key, value));
}
// force a flush to make sure that no records are read from memtable
ASSERT_OK(Flush(1));
// skip "0test"
iter->Next();
// make sure we can read all new records using the existing iterator
int count = 0;
for (; iter->Valid(); iter->Next(), ++count) {
}
ASSERT_EQ(count, num_records);
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorPrefixSeek) {
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip,
kSkipNoPrefix);
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.disable_auto_compactions = true;
options.prefix_extractor.reset(NewFixedPrefixTransform(2));
options.memtable_factory.reset(NewHashSkipListRepFactory(16));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options, handles_[1]));
ASSERT_OK(Put(1, "0101", "test"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "0202", "test"));
// Seek(0102) shouldn't find any records since 0202 has a different prefix
iter->Seek("0102");
ASSERT_TRUE(!iter->Valid());
iter->Seek("0202");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().ToString(), "0202");
iter->Next();
ASSERT_TRUE(!iter->Valid());
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip, 0);
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorIncomplete) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
read_options.read_tier = kBlockCacheTier;
std::string key = "key";
std::string value = "value";
ASSERT_OK(db_->Put(WriteOptions(), key, value));
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
iter->SeekToFirst();
// we either see the entry or it's not in cache
ASSERT_TRUE(iter->Valid() || iter->status().IsIncomplete());
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
iter->SeekToFirst();
// should still be true after compaction
ASSERT_TRUE(iter->Valid() || iter->status().IsIncomplete());
}
TEST_F(DBTestTailingIterator, ManagedTailingIteratorSeekToSame) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.write_buffer_size = 1000;
CreateAndReopenWithCF({"pikachu"}, options);
ReadOptions read_options;
read_options.tailing = true;
read_options.managed = true;
const int NROWS = 10000;
// Write rows with keys 00000, 00002, 00004 etc.
for (int i = 0; i < NROWS; ++i) {
char buf[100];
snprintf(buf, sizeof(buf), "%05d", 2 * i);
std::string key(buf);
std::string value("value");
ASSERT_OK(db_->Put(WriteOptions(), key, value));
}
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
// Seek to 00001. We expect to find 00002.
std::string start_key = "00001";
iter->Seek(start_key);
ASSERT_TRUE(iter->Valid());
std::string found = iter->key().ToString();
ASSERT_EQ("00002", found);
// Now seek to the same key. The iterator should remain in the same
// position.
iter->Seek(found);
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(found, iter->key().ToString());
}
} // namespace rocksdb
#endif // !defined(ROCKSDB_LITE)
int main(int argc, char** argv) {
#if !defined(ROCKSDB_LITE)
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
#else
return 0;
#endif
}