Using LZ4 by default [#CONV-4594].

dbms/include/DB/IO/CompressedWriteBuffer.h

@@ -94,7 +94,7 @@ private:
 public:
 	CompressedWriteBuffer(
 		WriteBuffer & out_,
-		CompressionMethod::Enum method_ = CompressionMethod::QuickLZ,
+		CompressionMethod::Enum method_ = CompressionMethod::LZ4,
 		size_t buf_size = DBMS_DEFAULT_BUFFER_SIZE)
 		: BufferWithOwnMemory<WriteBuffer>(buf_size), out(out_), method(method_), qlz_state(new qlz_state_compress) {}
 

dbms/include/DB/Storages/StorageLog.h

@@ -75,7 +75,7 @@ private:
 	{
 		Stream(const std::string & data_path, const std::string & marks_path) :
 			plain(data_path, DBMS_DEFAULT_BUFFER_SIZE, O_APPEND | O_CREAT | O_WRONLY),
-			compressed(plain, CompressionMethod::LZ4),
+			compressed(plain),
 			marks(marks_path, DBMS_DEFAULT_BUFFER_SIZE, O_APPEND | O_CREAT | O_WRONLY) {}
 		
 		WriteBufferFromFile plain;

utils/compressor/main.cpp

@@ -14,21 +14,21 @@ int main(int argc, char ** argv)
 	try
 	{
 		bool decompress = false;
-		bool use_lz4 = false;
+		bool use_qlz = false;
 
 		if (argc == 2)
 		{
 			decompress = 0 == strcmp(argv[1], "-d");
-			use_lz4 = 0 == strcmp(argv[1], "--lz4");
+			use_qlz = 0 == strcmp(argv[1], "--qlz");
 		}
 		
-		if (argc > 2 || (argc == 2 && !decompress && !use_lz4))
+		if (argc > 2 || (argc == 2 && !decompress && !use_qlz))
 		{
-			std::cerr << "Usage: " << argv[0] << " [-d|--lz4] < in > out" << std::endl;
+			std::cerr << "Usage: " << argv[0] << " [-d|--qlz] < in > out" << std::endl;
 			return 1;
 		}
 
-		DB::CompressionMethod::Enum method = use_lz4 ? DB::CompressionMethod::LZ4 : DB::CompressionMethod::QuickLZ;
+		DB::CompressionMethod::Enum method = use_qlz ? DB::CompressionMethod::QuickLZ : DB::CompressionMethod::LZ4;
 
 		Poco::SharedPtr<DB::ReadBuffer> rb = new DB::ReadBufferFromFileDescriptor(STDIN_FILENO);
 		Poco::SharedPtr<DB::WriteBuffer> wb = new DB::WriteBufferFromFileDescriptor(STDOUT_FILENO);