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Compression: fix zstd compression level be negative number #9323

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merged 2 commits into from
Aug 14, 2024
Merged

Compression: fix zstd compression level be negative number #9323

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Compression: fix zstd compression level be negative number
Lloyd-Pottiger Aug 14, 2024
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add ut
Lloyd-Pottiger Aug 14, 2024
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32 changes: 17 additions & 15 deletions dbms/src/IO/Compression/CompressionCodecFactory.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ CompressionCodecPtr CompressionCodecFactory::getStaticCodec<CompressionCodecLZ4>
if (lz4_map.size() >= MAX_LZ4_MAP_SIZE)
lz4_map.clear();
auto [it, inserted] = lz4_map.emplace(setting.level, std::make_shared<CompressionCodecLZ4>(setting.level));
assert(inserted);
return it->second;
}

Expand All @@ -113,27 +114,28 @@ CompressionCodecPtr CompressionCodecFactory::getStaticCodec<CompressionCodecLZ4H
if (lz4hc_map.size() >= MAX_LZ4HC_MAP_SIZE)
lz4hc_map.clear();
auto [it, inserted] = lz4hc_map.emplace(setting.level, std::make_shared<CompressionCodecLZ4HC>(setting.level));
assert(inserted);
return it->second;
}

template <>
CompressionCodecPtr CompressionCodecFactory::getStaticCodec<CompressionCodecZSTD>(const CompressionSetting & setting)
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{
// ZSTD level is in the range [1, 22], the maximum size of the map is 22.
static std::vector<CompressionCodecPtr> zstd_map = {
std::make_shared<CompressionCodecZSTD>(1), std::make_shared<CompressionCodecZSTD>(2),
std::make_shared<CompressionCodecZSTD>(3), std::make_shared<CompressionCodecZSTD>(4),
std::make_shared<CompressionCodecZSTD>(5), std::make_shared<CompressionCodecZSTD>(6),
std::make_shared<CompressionCodecZSTD>(7), std::make_shared<CompressionCodecZSTD>(8),
std::make_shared<CompressionCodecZSTD>(9), std::make_shared<CompressionCodecZSTD>(10),
std::make_shared<CompressionCodecZSTD>(11), std::make_shared<CompressionCodecZSTD>(12),
std::make_shared<CompressionCodecZSTD>(13), std::make_shared<CompressionCodecZSTD>(14),
std::make_shared<CompressionCodecZSTD>(15), std::make_shared<CompressionCodecZSTD>(16),
std::make_shared<CompressionCodecZSTD>(17), std::make_shared<CompressionCodecZSTD>(18),
std::make_shared<CompressionCodecZSTD>(19), std::make_shared<CompressionCodecZSTD>(20),
std::make_shared<CompressionCodecZSTD>(21), std::make_shared<CompressionCodecZSTD>(22),
};
return zstd_map[setting.level - 1];
static constexpr auto MAX_ZSTD_MAP_SIZE = 10;
static std::shared_mutex zstd_mutex;
static std::unordered_map<int, CompressionCodecPtr> zstd_map;
{
std::shared_lock lock(zstd_mutex);
auto it = zstd_map.find(setting.level);
if (it != zstd_map.end())
return it->second;
}
std::unique_lock lock(zstd_mutex);
if (zstd_map.size() >= MAX_ZSTD_MAP_SIZE)
zstd_map.clear();
auto [it, inserted] = zstd_map.emplace(setting.level, std::make_shared<CompressionCodecZSTD>(setting.level));
assert(inserted);
return it->second;
}

template <>
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