// Special Env used to delay background operations
class SpecialEnv : public EnvWrapper {
public:
- // sstable Sync() calls are blocked while this pointer is non-NULL.
- port::AtomicPointer delay_sstable_sync_;
+ // sstable/log Sync() calls are blocked while this pointer is non-NULL.
+ port::AtomicPointer delay_data_sync_;
+
+ // sstable/log Sync() calls return an error.
+ port::AtomicPointer data_sync_error_;
// Simulate no-space errors while this pointer is non-NULL.
port::AtomicPointer no_space_;
bool count_random_reads_;
AtomicCounter random_read_counter_;
- AtomicCounter sleep_counter_;
- AtomicCounter sleep_time_counter_;
-
explicit SpecialEnv(Env* base) : EnvWrapper(base) {
- delay_sstable_sync_.Release_Store(NULL);
+ delay_data_sync_.Release_Store(NULL);
+ data_sync_error_.Release_Store(NULL);
no_space_.Release_Store(NULL);
non_writable_.Release_Store(NULL);
count_random_reads_ = false;
}
Status NewWritableFile(const std::string& f, WritableFile** r) {
- class SSTableFile : public WritableFile {
+ class DataFile : public WritableFile {
private:
SpecialEnv* env_;
WritableFile* base_;
public:
- SSTableFile(SpecialEnv* env, WritableFile* base)
+ DataFile(SpecialEnv* env, WritableFile* base)
: env_(env),
base_(base) {
}
- ~SSTableFile() { delete base_; }
+ ~DataFile() { delete base_; }
Status Append(const Slice& data) {
if (env_->no_space_.Acquire_Load() != NULL) {
// Drop writes on the floor
Status Close() { return base_->Close(); }
Status Flush() { return base_->Flush(); }
Status Sync() {
- while (env_->delay_sstable_sync_.Acquire_Load() != NULL) {
+ if (env_->data_sync_error_.Acquire_Load() != NULL) {
+ return Status::IOError("simulated data sync error");
+ }
+ while (env_->delay_data_sync_.Acquire_Load() != NULL) {
DelayMilliseconds(100);
}
return base_->Sync();
Status s = target()->NewWritableFile(f, r);
if (s.ok()) {
- if (strstr(f.c_str(), ".sst") != NULL) {
- *r = new SSTableFile(this, *r);
+ if (strstr(f.c_str(), ".ldb") != NULL ||
+ strstr(f.c_str(), ".log") != NULL) {
+ *r = new DataFile(this, *r);
} else if (strstr(f.c_str(), "MANIFEST") != NULL) {
*r = new ManifestFile(this, *r);
}
}
return s;
}
-
- virtual void SleepForMicroseconds(int micros) {
- sleep_counter_.Increment();
- sleep_time_counter_.IncrementBy(micros);
- }
-
};
class DBTest {
}
// Check reverse iteration results are the reverse of forward results
- int matched = 0;
+ size_t matched = 0;
for (iter->SeekToLast(); iter->Valid(); iter->Prev()) {
ASSERT_LT(matched, forward.size());
ASSERT_EQ(IterStatus(iter), forward[forward.size() - matched - 1]);
}
return false;
}
+
+ // Returns number of files renamed.
+ int RenameLDBToSST() {
+ std::vector<std::string> filenames;
+ ASSERT_OK(env_->GetChildren(dbname_, &filenames));
+ uint64_t number;
+ FileType type;
+ int files_renamed = 0;
+ for (size_t i = 0; i < filenames.size(); i++) {
+ if (ParseFileName(filenames[i], &number, &type) && type == kTableFile) {
+ const std::string from = TableFileName(dbname_, number);
+ const std::string to = SSTTableFileName(dbname_, number);
+ ASSERT_OK(env_->RenameFile(from, to));
+ files_renamed++;
+ }
+ }
+ return files_renamed;
+ }
};
TEST(DBTest, Empty) {
ASSERT_OK(Put("foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
- env_->delay_sstable_sync_.Release_Store(env_); // Block sync calls
+ env_->delay_data_sync_.Release_Store(env_); // Block sync calls
Put("k1", std::string(100000, 'x')); // Fill memtable
Put("k2", std::string(100000, 'y')); // Trigger compaction
ASSERT_EQ("v1", Get("foo"));
- env_->delay_sstable_sync_.Release_Store(NULL); // Release sync calls
+ env_->delay_data_sync_.Release_Store(NULL); // Release sync calls
} while (ChangeOptions());
}
// * sstable B in level 2
// Then do enough Get() calls to arrange for an automatic compaction
// of sstable A. A bug would cause the compaction to be marked as
- // occuring at level 1 (instead of the correct level 0).
+ // occurring at level 1 (instead of the correct level 0).
// Step 1: First place sstables in levels 0 and 2
int compaction_count = 0;
Compact("a", "z");
const int num_files = CountFiles();
env_->no_space_.Release_Store(env_); // Force out-of-space errors
- env_->sleep_counter_.Reset();
- for (int i = 0; i < 5; i++) {
+ for (int i = 0; i < 10; i++) {
for (int level = 0; level < config::kNumLevels-1; level++) {
dbfull()->TEST_CompactRange(level, NULL, NULL);
}
}
env_->no_space_.Release_Store(NULL);
ASSERT_LT(CountFiles(), num_files + 3);
-
- // Check that compaction attempts slept after errors
- ASSERT_GE(env_->sleep_counter_.Read(), 5);
-}
-
-TEST(DBTest, ExponentialBackoff) {
- Options options = CurrentOptions();
- options.env = env_;
- Reopen(&options);
-
- ASSERT_OK(Put("foo", "v1"));
- ASSERT_EQ("v1", Get("foo"));
- Compact("a", "z");
- env_->non_writable_.Release_Store(env_); // Force errors for new files
- env_->sleep_counter_.Reset();
- env_->sleep_time_counter_.Reset();
- for (int i = 0; i < 5; i++) {
- dbfull()->TEST_CompactRange(2, NULL, NULL);
- }
- env_->non_writable_.Release_Store(NULL);
-
- // Wait for compaction to finish
- DelayMilliseconds(1000);
-
- ASSERT_GE(env_->sleep_counter_.Read(), 5);
- ASSERT_LT(env_->sleep_counter_.Read(), 10);
- ASSERT_GE(env_->sleep_time_counter_.Read(), 10e6);
}
TEST(DBTest, NonWritableFileSystem) {
env_->non_writable_.Release_Store(NULL);
}
+TEST(DBTest, WriteSyncError) {
+ // Check that log sync errors cause the DB to disallow future writes.
+
+ // (a) Cause log sync calls to fail
+ Options options = CurrentOptions();
+ options.env = env_;
+ Reopen(&options);
+ env_->data_sync_error_.Release_Store(env_);
+
+ // (b) Normal write should succeed
+ WriteOptions w;
+ ASSERT_OK(db_->Put(w, "k1", "v1"));
+ ASSERT_EQ("v1", Get("k1"));
+
+ // (c) Do a sync write; should fail
+ w.sync = true;
+ ASSERT_TRUE(!db_->Put(w, "k2", "v2").ok());
+ ASSERT_EQ("v1", Get("k1"));
+ ASSERT_EQ("NOT_FOUND", Get("k2"));
+
+ // (d) make sync behave normally
+ env_->data_sync_error_.Release_Store(NULL);
+
+ // (e) Do a non-sync write; should fail
+ w.sync = false;
+ ASSERT_TRUE(!db_->Put(w, "k3", "v3").ok());
+ ASSERT_EQ("v1", Get("k1"));
+ ASSERT_EQ("NOT_FOUND", Get("k2"));
+ ASSERT_EQ("NOT_FOUND", Get("k3"));
+}
+
TEST(DBTest, ManifestWriteError) {
// Test for the following problem:
// (a) Compaction produces file F
<< s.ToString();
}
+TEST(DBTest, StillReadSST) {
+ ASSERT_OK(Put("foo", "bar"));
+ ASSERT_EQ("bar", Get("foo"));
+
+ // Dump the memtable to disk.
+ dbfull()->TEST_CompactMemTable();
+ ASSERT_EQ("bar", Get("foo"));
+ Close();
+ ASSERT_GT(RenameLDBToSST(), 0);
+ Options options = CurrentOptions();
+ options.paranoid_checks = true;
+ Status s = TryReopen(&options);
+ ASSERT_TRUE(s.ok());
+ ASSERT_EQ("bar", Get("foo"));
+}
+
TEST(DBTest, FilesDeletedAfterCompaction) {
ASSERT_OK(Put("foo", "v2"));
Compact("a", "z");
dbfull()->TEST_CompactMemTable();
// Prevent auto compactions triggered by seeks
- env_->delay_sstable_sync_.Release_Store(env_);
+ env_->delay_data_sync_.Release_Store(env_);
// Lookup present keys. Should rarely read from small sstable.
env_->random_read_counter_.Reset();
fprintf(stderr, "%d missing => %d reads\n", N, reads);
ASSERT_LE(reads, 3*N/100);
- env_->delay_sstable_sync_.Release_Store(NULL);
+ env_->delay_data_sync_.Release_Store(NULL);
Close();
delete options.block_cache;
delete options.filter_policy;
ASSERT_EQ(k, key);
ASSERT_GE(w, 0);
ASSERT_LT(w, kNumThreads);
- ASSERT_LE(c, reinterpret_cast<uintptr_t>(
+ ASSERT_LE(static_cast<uintptr_t>(c), reinterpret_cast<uintptr_t>(
t->state->counter[w].Acquire_Load()));
}
}
git://git.novaco.in / novacoin.git / blobdiff