mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 19:32:07 +00:00
646 lines
20 KiB
C++
646 lines
20 KiB
C++
#include <Storages/StorageLog.h>
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#include <Storages/StorageFactory.h>
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#include <Common/Exception.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/WriteBufferFromFile.h>
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#include <IO/CompressedReadBuffer.h>
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#include <IO/CompressedWriteBuffer.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <DataTypes/NestedUtils.h>
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#include <DataStreams/IProfilingBlockInputStream.h>
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#include <DataStreams/IBlockOutputStream.h>
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#include <Columns/ColumnArray.h>
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#include <Common/typeid_cast.h>
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#include <Interpreters/Context.h>
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#include <Poco/Path.h>
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#include <Poco/DirectoryIterator.h>
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#define DBMS_STORAGE_LOG_DATA_FILE_EXTENSION ".bin"
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#define DBMS_STORAGE_LOG_MARKS_FILE_NAME "__marks.mrk"
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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 LOGICAL_ERROR;
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extern const int EMPTY_LIST_OF_COLUMNS_PASSED;
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extern const int NO_SUCH_COLUMN_IN_TABLE;
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extern const int DUPLICATE_COLUMN;
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extern const int SIZES_OF_MARKS_FILES_ARE_INCONSISTENT;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int INCORRECT_FILE_NAME;
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}
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class LogBlockInputStream final : public IProfilingBlockInputStream
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{
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public:
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LogBlockInputStream(
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size_t block_size_, const NamesAndTypesList & columns_, StorageLog & storage_,
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size_t mark_number_, size_t rows_limit_, size_t max_read_buffer_size_)
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: block_size(block_size_),
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columns(columns_),
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storage(storage_),
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mark_number(mark_number_),
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rows_limit(rows_limit_),
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max_read_buffer_size(max_read_buffer_size_)
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{
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}
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String getName() const override { return "Log"; }
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Block getHeader() const override
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{
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Block res;
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for (const auto & name_type : columns)
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res.insert({ name_type.type->createColumn(), name_type.type, name_type.name });
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return Nested::flatten(res);
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}
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protected:
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Block readImpl() override;
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private:
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size_t block_size;
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NamesAndTypesList columns;
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StorageLog & storage;
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size_t mark_number; /// from what mark to read data
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size_t rows_limit; /// The maximum number of rows that can be read
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size_t rows_read = 0;
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size_t max_read_buffer_size;
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struct Stream
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{
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Stream(const std::string & data_path, size_t offset, size_t max_read_buffer_size)
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: plain(data_path, std::min(static_cast<Poco::File::FileSize>(max_read_buffer_size), Poco::File(data_path).getSize())),
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compressed(plain)
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{
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if (offset)
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plain.seek(offset);
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}
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ReadBufferFromFile plain;
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CompressedReadBuffer compressed;
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};
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using FileStreams = std::map<std::string, Stream>;
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FileStreams streams;
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using DeserializeState = IDataType::DeserializeBinaryBulkStatePtr;
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using DeserializeStates = std::map<String, DeserializeState>;
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DeserializeStates deserialize_states;
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void readData(const String & name, const IDataType & type, IColumn & column, size_t max_rows_to_read);
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};
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class LogBlockOutputStream final : public IBlockOutputStream
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{
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public:
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explicit LogBlockOutputStream(StorageLog & storage_)
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: storage(storage_),
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lock(storage.rwlock),
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marks_stream(storage.marks_file.path(), 4096, O_APPEND | O_CREAT | O_WRONLY)
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{
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}
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~LogBlockOutputStream() override
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{
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try
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{
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writeSuffix();
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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Block getHeader() const override { return storage.getSampleBlock(); }
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void write(const Block & block) override;
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void writeSuffix() override;
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private:
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StorageLog & storage;
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std::unique_lock<std::shared_mutex> lock;
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bool done = false;
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struct Stream
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{
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Stream(const std::string & data_path, size_t max_compress_block_size) :
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plain(data_path, max_compress_block_size, O_APPEND | O_CREAT | O_WRONLY),
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compressed(plain, CompressionSettings(CompressionMethod::LZ4), max_compress_block_size)
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{
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plain_offset = Poco::File(data_path).getSize();
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}
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WriteBufferFromFile plain;
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CompressedWriteBuffer compressed;
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size_t plain_offset; /// How many bytes were in the file at the time the LogBlockOutputStream was created.
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void finalize()
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{
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compressed.next();
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plain.next();
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}
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};
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using Mark = StorageLog::Mark;
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using MarksForColumns = std::vector<std::pair<size_t, Mark>>;
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using FileStreams = std::map<std::string, Stream>;
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FileStreams streams;
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using WrittenStreams = std::set<std::string>;
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WriteBufferFromFile marks_stream; /// Declared below `lock` to make the file open when rwlock is captured.
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using SerializeState = IDataType::SerializeBinaryBulkStatePtr;
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using SerializeStates = std::map<String, SerializeState>;
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SerializeStates serialize_states;
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IDataType::OutputStreamGetter createStreamGetter(const String & name, WrittenStreams & written_streams);
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void writeData(const String & name, const IDataType & type, const IColumn & column,
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MarksForColumns & out_marks,
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WrittenStreams & written_streams);
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void writeMarks(MarksForColumns && marks);
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};
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Block LogBlockInputStream::readImpl()
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{
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Block res;
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if (rows_read == rows_limit)
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return res;
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/// If there are no files in the folder, the table is empty.
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if (Poco::DirectoryIterator(storage.getFullPath()) == Poco::DirectoryIterator())
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return res;
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/// How many rows to read for the next block.
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size_t max_rows_to_read = std::min(block_size, rows_limit - rows_read);
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for (const auto & name_type : columns)
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{
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MutableColumnPtr column = name_type.type->createColumn();
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try
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{
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readData(name_type.name, *name_type.type, *column, max_rows_to_read);
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}
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catch (Exception & e)
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{
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e.addMessage("while reading column " + name_type.name + " at " + storage.path + escapeForFileName(storage.name));
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throw;
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}
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if (column->size())
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res.insert(ColumnWithTypeAndName(std::move(column), name_type.type, name_type.name));
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}
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if (res)
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rows_read += res.rows();
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if (!res || rows_read == rows_limit)
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{
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/** Close the files (before destroying the object).
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* When many sources are created, but simultaneously reading only a few of them,
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* buffers don't waste memory.
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*/
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streams.clear();
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}
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return Nested::flatten(res);
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}
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void LogBlockInputStream::readData(const String & name, const IDataType & type, IColumn & column, size_t max_rows_to_read)
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{
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IDataType::DeserializeBinaryBulkSettings settings; /// TODO Use avg_value_size_hint.
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auto createStringGetter = [&](bool stream_for_prefix)
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{
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return [&, stream_for_prefix] (const IDataType::SubstreamPath & path) -> ReadBuffer *
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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const auto & file_it = storage.files.find(stream_name);
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if (storage.files.end() == file_it)
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throw Exception("Logical error: no information about file " + stream_name + " in StorageLog", ErrorCodes::LOGICAL_ERROR);
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UInt64 offset = 0;
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if (!stream_for_prefix && mark_number)
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offset = file_it->second.marks[mark_number].offset;
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auto & data_file_path = file_it->second.data_file.path();
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auto it = streams.try_emplace(stream_name, data_file_path, offset, max_read_buffer_size).first;
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return &it->second.compressed;
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};
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};
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if (deserialize_states.count(name) == 0)
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{
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settings.getter = createStringGetter(true);
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type.deserializeBinaryBulkStatePrefix(settings, deserialize_states[name]);
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}
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settings.getter = createStringGetter(false);
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type.deserializeBinaryBulkWithMultipleStreams(column, max_rows_to_read, settings, deserialize_states[name]);
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}
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void LogBlockOutputStream::write(const Block & block)
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{
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storage.check(block, true);
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/// The set of written offset columns so that you do not write shared offsets of columns for nested structures multiple times
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WrittenStreams written_streams;
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MarksForColumns marks;
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marks.reserve(storage.file_count);
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for (size_t i = 0; i < block.columns(); ++i)
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{
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const ColumnWithTypeAndName & column = block.safeGetByPosition(i);
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writeData(column.name, *column.type, *column.column, marks, written_streams);
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}
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writeMarks(std::move(marks));
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}
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void LogBlockOutputStream::writeSuffix()
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{
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if (done)
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return;
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done = true;
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WrittenStreams written_streams;
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IDataType::SerializeBinaryBulkSettings settings;
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for (const auto & column : getHeader())
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{
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auto it = serialize_states.find(column.name);
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if (it != serialize_states.end())
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{
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settings.getter = createStreamGetter(column.name, written_streams);
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column.type->serializeBinaryBulkStateSuffix(settings, it->second);
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}
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}
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/// Finish write.
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marks_stream.next();
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for (auto & name_stream : streams)
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name_stream.second.finalize();
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std::vector<Poco::File> column_files;
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for (const auto & name_stream : streams)
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column_files.push_back(storage.files[name_stream.first].data_file);
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column_files.push_back(storage.marks_file);
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storage.file_checker.update(column_files.begin(), column_files.end());
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streams.clear();
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}
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IDataType::OutputStreamGetter LogBlockOutputStream::createStreamGetter(const String & name,
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WrittenStreams & written_streams)
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{
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return [&] (const IDataType::SubstreamPath & path) -> WriteBuffer *
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return nullptr;
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auto it = streams.find(stream_name);
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if (streams.end() == it)
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throw Exception("Logical error: stream was not created when writing data in LogBlockOutputStream",
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ErrorCodes::LOGICAL_ERROR);
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return &it->second.compressed;
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};
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}
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void LogBlockOutputStream::writeData(const String & name, const IDataType & type, const IColumn & column,
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MarksForColumns & out_marks,
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WrittenStreams & written_streams)
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{
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IDataType::SerializeBinaryBulkSettings settings;
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return;
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streams.try_emplace(stream_name, storage.files[stream_name].data_file.path(), storage.max_compress_block_size);
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}, settings.path);
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settings.getter = createStreamGetter(name, written_streams);
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if (serialize_states.count(name) == 0)
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type.serializeBinaryBulkStatePrefix(settings, serialize_states[name]);
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return;
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const auto & file = storage.files[stream_name];
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const auto stream_it = streams.find(stream_name);
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Mark mark;
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mark.rows = (file.marks.empty() ? 0 : file.marks.back().rows) + column.size();
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mark.offset = stream_it->second.plain_offset + stream_it->second.plain.count();
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out_marks.emplace_back(file.column_index, mark);
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}, settings.path);
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type.serializeBinaryBulkWithMultipleStreams(column, 0, 0, settings, serialize_states[name]);
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (!written_streams.emplace(stream_name).second)
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return;
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auto it = streams.find(stream_name);
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if (streams.end() == it)
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throw Exception("Logical error: stream was not created when writing data in LogBlockOutputStream", ErrorCodes::LOGICAL_ERROR);
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it->second.compressed.next();
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}, settings.path);
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}
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void LogBlockOutputStream::writeMarks(MarksForColumns && marks)
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{
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if (marks.size() != storage.file_count)
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throw Exception("Wrong number of marks generated from block. Makes no sense.", ErrorCodes::LOGICAL_ERROR);
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std::sort(marks.begin(), marks.end(), [](const auto & a, const auto & b) { return a.first < b.first; });
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for (const auto & mark : marks)
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{
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writeIntBinary(mark.second.rows, marks_stream);
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writeIntBinary(mark.second.offset, marks_stream);
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size_t column_index = mark.first;
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storage.files[storage.column_names[column_index]].marks.push_back(mark.second);
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}
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}
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StorageLog::StorageLog(
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const std::string & path_,
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const std::string & name_,
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const ColumnsDescription & columns_,
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size_t max_compress_block_size_)
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: IStorage{columns_},
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path(path_), name(name_),
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max_compress_block_size(max_compress_block_size_),
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file_checker(path + escapeForFileName(name) + '/' + "sizes.json")
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{
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if (path.empty())
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throw Exception("Storage " + getName() + " requires data path", ErrorCodes::INCORRECT_FILE_NAME);
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/// create files if they do not exist
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Poco::File(path + escapeForFileName(name) + '/').createDirectories();
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for (const auto & column : getColumns().getAllPhysical())
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addFiles(column.name, *column.type);
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marks_file = Poco::File(path + escapeForFileName(name) + '/' + DBMS_STORAGE_LOG_MARKS_FILE_NAME);
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}
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void StorageLog::addFiles(const String & column_name, const IDataType & type)
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{
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if (files.end() != files.find(column_name))
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throw Exception("Duplicate column with name " + column_name + " in constructor of StorageLog.",
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ErrorCodes::DUPLICATE_COLUMN);
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IDataType::StreamCallback stream_callback = [&] (const IDataType::SubstreamPath & substream_path)
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{
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String stream_name = IDataType::getFileNameForStream(column_name, substream_path);
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if (!files.count(stream_name))
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{
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ColumnData & column_data = files[stream_name];
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column_data.column_index = file_count;
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column_data.data_file = Poco::File{
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path + escapeForFileName(name) + '/' + stream_name + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION};
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column_names.push_back(stream_name);
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++file_count;
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}
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};
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IDataType::SubstreamPath path;
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type.enumerateStreams(stream_callback, path);
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}
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void StorageLog::loadMarks()
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{
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std::unique_lock<std::shared_mutex> lock(rwlock);
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if (loaded_marks)
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return;
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using FilesByIndex = std::vector<Files_t::iterator>;
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FilesByIndex files_by_index(file_count);
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for (Files_t::iterator it = files.begin(); it != files.end(); ++it)
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files_by_index[it->second.column_index] = it;
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if (marks_file.exists())
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{
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size_t file_size = marks_file.getSize();
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if (file_size % (file_count * sizeof(Mark)) != 0)
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throw Exception("Size of marks file is inconsistent", ErrorCodes::SIZES_OF_MARKS_FILES_ARE_INCONSISTENT);
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size_t marks_count = file_size / (file_count * sizeof(Mark));
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for (auto & file : files_by_index)
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file->second.marks.reserve(marks_count);
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ReadBufferFromFile marks_rb(marks_file.path(), 32768);
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while (!marks_rb.eof())
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{
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for (size_t i = 0; i < files_by_index.size(); ++i)
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{
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Mark mark;
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readIntBinary(mark.rows, marks_rb);
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readIntBinary(mark.offset, marks_rb);
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files_by_index[i]->second.marks.push_back(mark);
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}
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}
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}
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loaded_marks = true;
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}
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void StorageLog::rename(const String & new_path_to_db, const String & /*new_database_name*/, const String & new_table_name)
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{
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std::unique_lock<std::shared_mutex> lock(rwlock);
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/// Rename directory with data.
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Poco::File(path + escapeForFileName(name)).renameTo(new_path_to_db + escapeForFileName(new_table_name));
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path = new_path_to_db;
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name = new_table_name;
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file_checker.setPath(path + escapeForFileName(name) + '/' + "sizes.json");
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for (auto & file : files)
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file.second.data_file = Poco::File(path + escapeForFileName(name) + '/' + Poco::Path(file.second.data_file.path()).getFileName());
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marks_file = Poco::File(path + escapeForFileName(name) + '/' + DBMS_STORAGE_LOG_MARKS_FILE_NAME);
|
|
}
|
|
|
|
void StorageLog::truncate(const ASTPtr &)
|
|
{
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
|
|
String table_dir = path + escapeForFileName(name);
|
|
|
|
files.clear();
|
|
file_count = 0;
|
|
loaded_marks = false;
|
|
|
|
std::vector<Poco::File> data_files;
|
|
Poco::File(table_dir).list(data_files);
|
|
|
|
for (auto & file : data_files)
|
|
file.remove(false);
|
|
|
|
for (const auto & column : getColumns().getAllPhysical())
|
|
addFiles(column.name, *column.type);
|
|
|
|
file_checker = FileChecker{table_dir + "/" + "sizes.json"};
|
|
marks_file = Poco::File(table_dir + "/" + DBMS_STORAGE_LOG_MARKS_FILE_NAME);
|
|
}
|
|
|
|
|
|
const StorageLog::Marks & StorageLog::getMarksWithRealRowCount() const
|
|
{
|
|
const String & column_name = getColumns().ordinary.front().name;
|
|
const IDataType & column_type = *getColumns().ordinary.front().type;
|
|
String filename;
|
|
|
|
/** We take marks from first column.
|
|
* If this is a data type with multiple stream, get the first stream, that we assume have real row count.
|
|
* (Example: for Array data type, first stream is array sizes; and number of array sizes is the number of arrays).
|
|
*/
|
|
IDataType::SubstreamPath path;
|
|
column_type.enumerateStreams([&](const IDataType::SubstreamPath & substream_path)
|
|
{
|
|
if (filename.empty())
|
|
filename = IDataType::getFileNameForStream(column_name, substream_path);
|
|
}, path);
|
|
|
|
Files_t::const_iterator it = files.find(filename);
|
|
if (files.end() == it)
|
|
throw Exception("Cannot find file " + filename, ErrorCodes::LOGICAL_ERROR);
|
|
|
|
return it->second.marks;
|
|
}
|
|
|
|
BlockInputStreams StorageLog::read(
|
|
const Names & column_names,
|
|
const SelectQueryInfo & /*query_info*/,
|
|
const Context & context,
|
|
QueryProcessingStage::Enum /*processed_stage*/,
|
|
size_t max_block_size,
|
|
unsigned num_streams)
|
|
{
|
|
check(column_names);
|
|
loadMarks();
|
|
|
|
NamesAndTypesList all_columns = Nested::collect(getColumns().getAllPhysical().addTypes(column_names));
|
|
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
|
|
BlockInputStreams res;
|
|
|
|
const Marks & marks = getMarksWithRealRowCount();
|
|
size_t marks_size = marks.size();
|
|
|
|
if (num_streams > marks_size)
|
|
num_streams = marks_size;
|
|
|
|
size_t max_read_buffer_size = context.getSettingsRef().max_read_buffer_size;
|
|
|
|
for (size_t stream = 0; stream < num_streams; ++stream)
|
|
{
|
|
size_t mark_begin = stream * marks_size / num_streams;
|
|
size_t mark_end = (stream + 1) * marks_size / num_streams;
|
|
|
|
size_t rows_begin = mark_begin ? marks[mark_begin - 1].rows : 0;
|
|
size_t rows_end = mark_end ? marks[mark_end - 1].rows : 0;
|
|
|
|
res.emplace_back(std::make_shared<LogBlockInputStream>(
|
|
max_block_size,
|
|
all_columns,
|
|
*this,
|
|
mark_begin,
|
|
rows_end - rows_begin,
|
|
max_read_buffer_size));
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
BlockOutputStreamPtr StorageLog::write(
|
|
const ASTPtr & /*query*/, const Settings & /*settings*/)
|
|
{
|
|
loadMarks();
|
|
return std::make_shared<LogBlockOutputStream>(*this);
|
|
}
|
|
|
|
bool StorageLog::checkData() const
|
|
{
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
return file_checker.check();
|
|
}
|
|
|
|
|
|
void registerStorageLog(StorageFactory & factory)
|
|
{
|
|
factory.registerStorage("Log", [](const StorageFactory::Arguments & args)
|
|
{
|
|
if (!args.engine_args.empty())
|
|
throw Exception(
|
|
"Engine " + args.engine_name + " doesn't support any arguments (" + toString(args.engine_args.size()) + " given)",
|
|
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
|
|
|
return StorageLog::create(
|
|
args.data_path, args.table_name, args.columns,
|
|
args.context.getSettings().max_compress_block_size);
|
|
});
|
|
}
|
|
|
|
}
|