mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-01 03:52:15 +00:00
232 lines
8.5 KiB
C++
232 lines
8.5 KiB
C++
#include <iostream>
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#include <optional>
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#include <boost/program_options.hpp>
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#include <boost/algorithm/string/join.hpp>
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#include <Common/Exception.h>
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#include <IO/WriteBufferFromFileDescriptor.h>
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#include <IO/ReadBufferFromFileDescriptor.h>
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#include <IO/WriteBufferFromFile.h>
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#include <IO/ReadBufferFromFile.h>
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#include <Compression/CompressedWriteBuffer.h>
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#include <Compression/ParallelCompressedWriteBuffer.h>
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#include <Compression/CompressedReadBuffer.h>
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#include <Compression/CompressedReadBufferFromFile.h>
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#include <IO/WriteHelpers.h>
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#include <IO/copyData.h>
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#include <Parsers/parseQuery.h>
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#include <Parsers/ExpressionElementParsers.h>
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#include <Compression/CompressionFactory.h>
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#include <Common/TerminalSize.h>
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#include <Common/ThreadPool.h>
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#include <Common/CurrentMetrics.h>
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#include <Core/Defines.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int TOO_LARGE_SIZE_COMPRESSED;
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extern const int BAD_ARGUMENTS;
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}
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}
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namespace CurrentMetrics
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{
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extern const Metric LocalThread;
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extern const Metric LocalThreadActive;
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extern const Metric LocalThreadScheduled;
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}
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namespace
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{
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/// Outputs sizes of uncompressed and compressed blocks for compressed file.
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void checkAndWriteHeader(DB::ReadBuffer & in, DB::WriteBuffer & out)
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{
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while (!in.eof())
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{
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in.ignore(16); /// checksum
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char header[COMPRESSED_BLOCK_HEADER_SIZE];
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in.readStrict(header, COMPRESSED_BLOCK_HEADER_SIZE);
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UInt32 size_compressed = unalignedLoad<UInt32>(&header[1]);
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if (size_compressed > DBMS_MAX_COMPRESSED_SIZE)
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throw DB::Exception(DB::ErrorCodes::TOO_LARGE_SIZE_COMPRESSED, "Too large size_compressed. Most likely corrupted data.");
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UInt32 size_decompressed = unalignedLoad<UInt32>(&header[5]);
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DB::writeText(size_decompressed, out);
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DB::writeChar('\t', out);
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DB::writeText(size_compressed, out);
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DB::writeChar('\n', out);
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in.ignore(size_compressed - COMPRESSED_BLOCK_HEADER_SIZE);
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}
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}
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}
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int mainEntryClickHouseCompressor(int argc, char ** argv)
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{
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using namespace DB;
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namespace po = boost::program_options;
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bool print_stacktrace = false;
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try
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{
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po::options_description desc = createOptionsDescription("Allowed options", getTerminalWidth());
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desc.add_options()
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("help,h", "produce help message")
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("input", po::value<std::string>()->value_name("INPUT"), "input file")
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("output", po::value<std::string>()->value_name("OUTPUT"), "output file")
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("decompress,d", "decompress")
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("offset-in-compressed-file", po::value<size_t>()->default_value(0ULL), "offset to the compressed block (i.e. physical file offset)")
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("offset-in-decompressed-block", po::value<size_t>()->default_value(0ULL), "offset to the decompressed block (i.e. virtual offset)")
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("block-size,b", po::value<size_t>()->default_value(DBMS_DEFAULT_BUFFER_SIZE), "compress in blocks of specified size")
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("hc", "use LZ4HC instead of LZ4")
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("zstd", "use ZSTD instead of LZ4")
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("codec", po::value<std::vector<std::string>>()->multitoken(), "use codecs combination instead of LZ4")
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("level", po::value<int>(), "compression level for codecs specified via flags")
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("threads", po::value<size_t>()->default_value(1), "number of threads for parallel compression")
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("none", "use no compression instead of LZ4")
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("stat", "print block statistics of compressed data")
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("stacktrace", "print stacktrace of exception")
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;
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po::positional_options_description positional_desc;
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positional_desc.add("input", 1);
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positional_desc.add("output", 1);
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po::variables_map options;
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po::store(po::command_line_parser(argc, argv).options(desc).positional(positional_desc).run(), options);
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if (options.count("help"))
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{
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std::cout << "Usage: " << argv[0] << " [options] < INPUT > OUTPUT" << std::endl;
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std::cout << "Usage: " << argv[0] << " [options] INPUT OUTPUT" << std::endl;
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std::cout << desc << std::endl;
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std::cout << "\nSee also: https://clickhouse.com/docs/en/operations/utilities/clickhouse-compressor/\n";
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return 0;
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}
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bool decompress = options.count("decompress");
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bool use_lz4hc = options.count("hc");
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bool use_zstd = options.count("zstd");
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bool stat_mode = options.count("stat");
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bool use_none = options.count("none");
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print_stacktrace = options.count("stacktrace");
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size_t block_size = options["block-size"].as<size_t>();
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size_t num_threads = options["threads"].as<size_t>();
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std::vector<std::string> codecs;
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if (options.count("codec"))
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codecs = options["codec"].as<std::vector<std::string>>();
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if ((use_lz4hc || use_zstd || use_none) && !codecs.empty())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Wrong options, codec flags like --zstd and --codec options are mutually exclusive");
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if (num_threads < 1)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Invalid value of `threads` parameter");
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if (num_threads > 1 && decompress)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Parallel mode is only implemented for compression (not for decompression)");
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if (!codecs.empty() && options.count("level"))
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Wrong options, --level is not compatible with --codec list");
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std::string method_family = "LZ4";
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if (use_lz4hc)
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method_family = "LZ4HC";
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else if (use_zstd)
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method_family = "ZSTD";
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else if (use_none)
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method_family = "NONE";
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std::optional<int> level = std::nullopt;
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if (options.count("level"))
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level = options["level"].as<int>();
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CompressionCodecPtr codec;
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if (!codecs.empty())
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{
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ParserCodec codec_parser;
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std::string codecs_line = boost::algorithm::join(codecs, ",");
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auto ast = parseQuery(codec_parser, "(" + codecs_line + ")", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS);
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codec = CompressionCodecFactory::instance().get(ast, nullptr);
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}
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else
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codec = CompressionCodecFactory::instance().get(method_family, level);
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std::unique_ptr<ReadBufferFromFileBase> rb;
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std::unique_ptr<WriteBufferFromFileBase> wb;
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if (options.count("input"))
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rb = std::make_unique<ReadBufferFromFile>(options["input"].as<std::string>());
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else
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rb = std::make_unique<ReadBufferFromFileDescriptor>(STDIN_FILENO);
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if (options.count("output"))
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wb = std::make_unique<WriteBufferFromFile>(options["output"].as<std::string>());
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else
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wb = std::make_unique<WriteBufferFromFileDescriptor>(STDOUT_FILENO);
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if (stat_mode)
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{
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/// Output statistic for compressed file.
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checkAndWriteHeader(*rb, *wb);
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}
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else if (decompress)
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{
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/// Decompression
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size_t offset_in_compressed_file = options["offset-in-compressed-file"].as<size_t>();
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size_t offset_in_decompressed_block = options["offset-in-decompressed-block"].as<size_t>();
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if (offset_in_compressed_file || offset_in_decompressed_block)
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{
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CompressedReadBufferFromFile compressed_file(std::move(rb));
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compressed_file.seek(offset_in_compressed_file, offset_in_decompressed_block);
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copyData(compressed_file, *wb);
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}
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else
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{
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CompressedReadBuffer from(*rb);
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copyData(from, *wb);
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}
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}
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else
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{
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/// Compression
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if (num_threads == 1)
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{
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CompressedWriteBuffer to(*wb, codec, block_size);
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copyData(*rb, to);
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to.finalize();
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}
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else
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{
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ThreadPool pool(CurrentMetrics::LocalThread, CurrentMetrics::LocalThreadActive, CurrentMetrics::LocalThreadScheduled, num_threads);
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ParallelCompressedWriteBuffer to(*wb, codec, block_size, num_threads, pool);
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copyData(*rb, to);
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to.finalize();
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}
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}
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wb->finalize();
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}
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catch (...)
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{
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std::cerr << getCurrentExceptionMessage(print_stacktrace) << '\n';
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return getCurrentExceptionCode();
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}
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return 0;
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}
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