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Fix compression tests when snappy not available (#11396)

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Summary:
Tweak some bounds and things, and reduce risk of surprise results by running on all supported compressions (mostly).

Also improves the precise compressibility of CompressibleString by using RandomBinaryString.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11396

Test Plan: updated tests

Reviewed By: ltamasi

Differential Revision: D45211938

Pulled By: pdillinger

fbshipit-source-id: 9dc1dd8574a60a9364efe18558be66d31a35598b
oxigraph-8.3.2
Peter Dillinger 2 years ago committed by Facebook GitHub Bot
parent d79be3dca2
commit fb63d9b4ee
3 changed files with 145 additions and 175 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 226
      db/db_statistics_test.cc
  2. 92
      table/table_test.cc
  3. 2
      test_util/testutil.cc

226
db/db_statistics_test.cc
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@ -20,131 +20,115 @@ class DBStatisticsTest : public DBTestBase {
};
TEST_F(DBStatisticsTest, CompressionStatsTest) {
CompressionType type;
if (Snappy_Supported()) {
type = kSnappyCompression;
fprintf(stderr, "using snappy\n");
} else if (Zlib_Supported()) {
type = kZlibCompression;
fprintf(stderr, "using zlib\n");
} else if (BZip2_Supported()) {
type = kBZip2Compression;
fprintf(stderr, "using bzip2\n");
} else if (LZ4_Supported()) {
type = kLZ4Compression;
fprintf(stderr, "using lz4\n");
} else if (XPRESS_Supported()) {
type = kXpressCompression;
fprintf(stderr, "using xpress\n");
} else if (ZSTD_Supported()) {
type = kZSTD;
fprintf(stderr, "using ZSTD\n");
} else {
fprintf(stderr, "skipping test, compression disabled\n");
return;
}
Options options = CurrentOptions();
options.compression = type;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kExceptTimeForMutex);
BlockBasedTableOptions bbto;
bbto.enable_index_compression = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyAndReopen(options);
auto PopStat = [&](Tickers t) -> uint64_t {
return options.statistics->getAndResetTickerCount(t);
};
int kNumKeysWritten = 100;
double compress_to = 0.5;
// About three KVs per block
int len = static_cast<int>(BlockBasedTableOptions().block_size / 3);
int uncomp_est = kNumKeysWritten * (len + 20);
Random rnd(301);
std::string buf;
for (CompressionType type : GetSupportedCompressions()) {
if (type == kNoCompression) {
continue;
}
if (type == kBZip2Compression) {
// Weird behavior in this test
continue;
}
SCOPED_TRACE("Compression type: " + std::to_string(type));
Options options = CurrentOptions();
options.compression = type;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kExceptTimeForMutex);
BlockBasedTableOptions bbto;
bbto.enable_index_compression = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyAndReopen(options);
auto PopStat = [&](Tickers t) -> uint64_t {
return options.statistics->getAndResetTickerCount(t);
};
int kNumKeysWritten = 100;
double compress_to = 0.5;
// About three KVs per block
int len = static_cast<int>(BlockBasedTableOptions().block_size / 3);
int uncomp_est = kNumKeysWritten * (len + 20);
Random rnd(301);
std::string buf;
// Check that compressions occur and are counted when compression is turned
// on
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(
Put(Key(i), test::CompressibleString(&rnd, compress_to, len, &buf)));
}
ASSERT_OK(Flush());
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSED_FROM), uncomp_est / 10);
EXPECT_NEAR2(uncomp_est * compress_to, PopStat(BYTES_COMPRESSED_TO),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
// And decompressions
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_DECOMPRESSED_TO), uncomp_est / 10);
EXPECT_NEAR2(uncomp_est * compress_to, PopStat(BYTES_DECOMPRESSED_FROM),
uncomp_est / 10);
// Check that compressions occur and are counted when compression is turned on
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(
Put(Key(i), test::CompressibleString(&rnd, compress_to, len, &buf)));
}
ASSERT_OK(Flush());
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSED_FROM), uncomp_est / 10);
EXPECT_NEAR2(uncomp_est * compress_to, PopStat(BYTES_COMPRESSED_TO),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
// And decompressions
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_DECOMPRESSED_TO), uncomp_est / 10);
EXPECT_NEAR2(uncomp_est * compress_to, PopStat(BYTES_DECOMPRESSED_FROM),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
// Check when compression is rejected.
compress_to = 0.95;
DestroyAndReopen(options);
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(
Put(Key(i), test::CompressibleString(&rnd, compress_to, len, &buf)));
}
ASSERT_OK(Flush());
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSION_REJECTED),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_TO));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
// Check when compression is disabled.
options.compression = kNoCompression;
DestroyAndReopen(options);
// Check when compression is rejected.
DestroyAndReopen(options);
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(
Put(Key(i), test::CompressibleString(&rnd, compress_to, len, &buf)));
}
ASSERT_OK(Flush());
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(Put(Key(i), rnd.RandomBinaryString(len)));
}
ASSERT_OK(Flush());
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSION_REJECTED),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_TO));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_BYPASSED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
// Check when compression is disabled.
options.compression = kNoCompression;
DestroyAndReopen(options);
for (int i = 0; i < kNumKeysWritten; ++i) {
ASSERT_OK(Put(Key(i), rnd.RandomBinaryString(len)));
}
ASSERT_OK(Flush());
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSION_BYPASSED),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_TO));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
}
EXPECT_EQ(34, PopStat(NUMBER_BLOCK_COMPRESSION_BYPASSED));
EXPECT_NEAR2(uncomp_est, PopStat(BYTES_COMPRESSION_BYPASSED),
uncomp_est / 10);
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(NUMBER_BLOCK_DECOMPRESSED));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSED_TO));
EXPECT_EQ(0, PopStat(BYTES_COMPRESSION_REJECTED));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_FROM));
EXPECT_EQ(0, PopStat(BYTES_DECOMPRESSED_TO));
}
TEST_F(DBStatisticsTest, MutexWaitStatsDisabledByDefault) {

92
table/table_test.cc
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@ -5081,63 +5081,49 @@ TEST_P(BlockBasedTableTest, PropertiesBlockRestartPointTest) {
}
TEST_P(BlockBasedTableTest, CompressionRatioThreshold) {
Options options;
if (Snappy_Supported()) {
options.compression = kSnappyCompression;
fprintf(stderr, "using snappy\n");
} else if (Zlib_Supported()) {
options.compression = kZlibCompression;
fprintf(stderr, "using zlib\n");
} else if (BZip2_Supported()) {
options.compression = kBZip2Compression;
fprintf(stderr, "using bzip2\n");
} else if (LZ4_Supported()) {
options.compression = kLZ4Compression;
fprintf(stderr, "using lz4\n");
} else if (XPRESS_Supported()) {
options.compression = kXpressCompression;
fprintf(stderr, "using xpress\n");
} else if (ZSTD_Supported()) {
options.compression = kZSTD;
fprintf(stderr, "using ZSTD\n");
} else {
fprintf(stderr, "skipping test, compression disabled\n");
return;
}
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
int len = 10000;
Random rnd(301);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
for (CompressionType type : GetSupportedCompressions()) {
if (type == kNoCompression) {
continue;
}
SCOPED_TRACE("Compression type: " + std::to_string(type));
// Test the max_compressed_bytes_per_kb option
for (int threshold : {0, 1, 100, 400, 600, 900, 1024}) {
SCOPED_TRACE("threshold=" + std::to_string(threshold));
options.compression_opts.max_compressed_bytes_per_kb = threshold;
ImmutableOptions ioptions(options);
MutableCFOptions moptions(options);
Options options;
options.compression = type;
for (double compressible_to : {0.25, 0.75}) {
SCOPED_TRACE("compressible_to=" + std::to_string(compressible_to));
TableConstructor c(BytewiseComparator(),
true /* convert_to_internal_key_ */);
std::string buf;
c.Add("x", test::CompressibleString(&rnd, compressible_to, len, &buf));
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
int len = 10000;
Random rnd(301);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
// write an SST file
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
// Test the max_compressed_bytes_per_kb option
for (int threshold : {0, 1, 100, 400, 600, 900, 1024}) {
SCOPED_TRACE("threshold=" + std::to_string(threshold));
options.compression_opts.max_compressed_bytes_per_kb = threshold;
ImmutableOptions ioptions(options);
MutableCFOptions moptions(options);
size_t table_file_size = c.TEST_GetSink()->contents().size();
size_t approx_sst_overhead = 1000;
if (compressible_to < threshold / 1024.0) {
// Should be compressed
EXPECT_NEAR2(len * compressible_to + approx_sst_overhead,
table_file_size, len / 10);
} else {
// Should not be compressed
EXPECT_NEAR2(len + approx_sst_overhead, table_file_size, len / 10);
for (double compressible_to : {0.25, 0.75}) {
SCOPED_TRACE("compressible_to=" + std::to_string(compressible_to));
TableConstructor c(BytewiseComparator(),
true /* convert_to_internal_key_ */);
std::string buf;
c.Add("x", test::CompressibleString(&rnd, compressible_to, len, &buf));
// write an SST file
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
size_t table_file_size = c.TEST_GetSink()->contents().size();
size_t approx_sst_overhead = 1000;
if (compressible_to < threshold / 1024.0) {
// Should be compressed (substantial variance depending on algorithm)
EXPECT_NEAR2(len * compressible_to + approx_sst_overhead,
table_file_size, len / 8);
} else {
// Should not be compressed
EXPECT_NEAR2(len + approx_sst_overhead, table_file_size, len / 10);
}
}
}
}

2
test_util/testutil.cc
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@ -76,7 +76,7 @@ extern Slice CompressibleString(Random* rnd, double compressed_fraction,
int len, std::string* dst) {
int raw = static_cast<int>(len * compressed_fraction);
if (raw < 1) raw = 1;
std::string raw_data = rnd->RandomString(raw);
std::string raw_data = rnd->RandomBinaryString(raw);
// Duplicate the random data until we have filled "len" bytes
dst->clear();

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