mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
650 lines
21 KiB
C++
650 lines
21 KiB
C++
#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <map>
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#include <optional>
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#include <Common/escapeForFileName.h>
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#include <Common/Exception.h>
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#include <IO/WriteBufferFromFileBase.h>
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#include <Compression/CompressedReadBuffer.h>
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#include <Compression/CompressedReadBufferFromFile.h>
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#include <Compression/CompressedWriteBuffer.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <IO/copyData.h>
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#include <Formats/NativeReader.h>
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#include <Formats/NativeWriter.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <Columns/ColumnArray.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/evaluateConstantExpression.h>
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#include <Parsers/ASTLiteral.h>
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#include <Storages/StorageFactory.h>
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#include <Storages/StorageStripeLog.h>
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#include "StorageLogSettings.h"
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#include <Processors/Sources/SourceWithProgress.h>
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#include <Processors/Sources/NullSource.h>
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#include <Processors/Sinks/SinkToStorage.h>
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#include <QueryPipeline/Pipe.h>
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#include <Backups/BackupEntryFromImmutableFile.h>
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#include <Backups/BackupEntryFromSmallFile.h>
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#include <Backups/IBackup.h>
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#include <Disks/TemporaryFileOnDisk.h>
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#include <base/insertAtEnd.h>
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#include <cassert>
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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 NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int INCORRECT_FILE_NAME;
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extern const int TIMEOUT_EXCEEDED;
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extern const int NOT_IMPLEMENTED;
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}
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/// NOTE: The lock `StorageStripeLog::rwlock` is NOT kept locked while reading,
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/// because we read ranges of data that do not change.
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class StripeLogSource final : public SourceWithProgress
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{
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public:
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static Block getHeader(
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const StorageStripeLog & storage,
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const StorageMetadataPtr & metadata_snapshot,
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const Names & column_names,
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IndexForNativeFormat::Blocks::const_iterator index_begin,
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IndexForNativeFormat::Blocks::const_iterator index_end)
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{
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if (index_begin == index_end)
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return metadata_snapshot->getSampleBlockForColumns(column_names, storage.getVirtuals(), storage.getStorageID());
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/// TODO: check if possible to always return storage.getSampleBlock()
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Block header;
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for (const auto & column : index_begin->columns)
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{
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auto type = DataTypeFactory::instance().get(column.type);
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header.insert(ColumnWithTypeAndName{ type, column.name });
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}
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return header;
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}
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StripeLogSource(
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const StorageStripeLog & storage_,
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const StorageMetadataPtr & metadata_snapshot_,
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const Names & column_names,
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ReadSettings read_settings_,
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std::shared_ptr<const IndexForNativeFormat> indices_,
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IndexForNativeFormat::Blocks::const_iterator index_begin_,
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IndexForNativeFormat::Blocks::const_iterator index_end_,
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size_t file_size_)
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: SourceWithProgress(getHeader(storage_, metadata_snapshot_, column_names, index_begin_, index_end_))
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, storage(storage_)
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, metadata_snapshot(metadata_snapshot_)
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, read_settings(std::move(read_settings_))
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, indices(indices_)
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, index_begin(index_begin_)
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, index_end(index_end_)
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, file_size(file_size_)
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{
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}
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String getName() const override { return "StripeLog"; }
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protected:
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Chunk generate() override
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{
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Block res;
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start();
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if (block_in)
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{
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res = block_in->read();
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/// Freeing memory before destroying the object.
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if (!res)
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{
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block_in.reset();
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data_in.reset();
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indices.reset();
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}
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}
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return Chunk(res.getColumns(), res.rows());
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}
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private:
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const StorageStripeLog & storage;
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StorageMetadataPtr metadata_snapshot;
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ReadSettings read_settings;
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std::shared_ptr<const IndexForNativeFormat> indices;
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IndexForNativeFormat::Blocks::const_iterator index_begin;
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IndexForNativeFormat::Blocks::const_iterator index_end;
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size_t file_size;
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Block header;
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/** optional - to create objects only on first reading
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* and delete objects (release buffers) after the source is exhausted
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* - to save RAM when using a large number of sources.
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*/
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bool started = false;
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std::optional<CompressedReadBufferFromFile> data_in;
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std::optional<NativeReader> block_in;
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void start()
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{
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if (!started)
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{
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started = true;
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String data_file_path = storage.table_path + "data.bin";
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data_in.emplace(storage.disk->readFile(data_file_path, read_settings.adjustBufferSize(file_size)));
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block_in.emplace(*data_in, 0, index_begin, index_end);
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}
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}
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};
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/// NOTE: The lock `StorageStripeLog::rwlock` is kept locked in exclusive mode while writing.
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class StripeLogSink final : public SinkToStorage
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{
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public:
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using WriteLock = std::unique_lock<std::shared_timed_mutex>;
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explicit StripeLogSink(
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StorageStripeLog & storage_, const StorageMetadataPtr & metadata_snapshot_, WriteLock && lock_)
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: SinkToStorage(metadata_snapshot_->getSampleBlock())
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, storage(storage_)
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, metadata_snapshot(metadata_snapshot_)
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, lock(std::move(lock_))
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, data_out_compressed(storage.disk->writeFile(storage.data_file_path, DBMS_DEFAULT_BUFFER_SIZE, WriteMode::Append))
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, data_out(std::make_unique<CompressedWriteBuffer>(
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*data_out_compressed, CompressionCodecFactory::instance().getDefaultCodec(), storage.max_compress_block_size))
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{
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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/// Ensure that indices are loaded because we're going to update them.
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storage.loadIndices(lock);
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/// If there were no files, save zero file sizes to be able to rollback in case of error.
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storage.saveFileSizes(lock);
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size_t initial_data_size = storage.file_checker.getFileSize(storage.data_file_path);
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block_out = std::make_unique<NativeWriter>(*data_out, 0, metadata_snapshot->getSampleBlock(), false, &storage.indices, initial_data_size);
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}
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String getName() const override { return "StripeLogSink"; }
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~StripeLogSink() override
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{
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try
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{
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if (!done)
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{
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/// Rollback partial writes.
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/// No more writing.
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data_out.reset();
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data_out_compressed.reset();
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/// Truncate files to the older sizes.
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storage.file_checker.repair();
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/// Remove excessive indices.
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storage.removeUnsavedIndices(lock);
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}
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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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void consume(Chunk chunk) override
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{
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block_out->write(getHeader().cloneWithColumns(chunk.detachColumns()));
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}
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void onFinish() override
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{
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if (done)
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return;
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data_out->next();
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data_out_compressed->next();
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data_out_compressed->finalize();
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/// Save the new indices.
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storage.saveIndices(lock);
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/// Save the new file sizes.
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storage.saveFileSizes(lock);
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done = true;
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/// unlock should be done from the same thread as lock, and dtor may be
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/// called from different thread, so it should be done here (at least in
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/// case of no exceptions occurred)
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lock.unlock();
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}
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private:
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StorageStripeLog & storage;
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StorageMetadataPtr metadata_snapshot;
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WriteLock lock;
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std::unique_ptr<WriteBuffer> data_out_compressed;
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std::unique_ptr<CompressedWriteBuffer> data_out;
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std::unique_ptr<NativeWriter> block_out;
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bool done = false;
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};
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StorageStripeLog::StorageStripeLog(
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DiskPtr disk_,
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const String & relative_path_,
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const StorageID & table_id_,
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const ColumnsDescription & columns_,
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const ConstraintsDescription & constraints_,
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const String & comment,
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bool attach,
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size_t max_compress_block_size_)
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: IStorage(table_id_)
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, disk(std::move(disk_))
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, table_path(relative_path_)
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, data_file_path(table_path + "data.bin")
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, index_file_path(table_path + "index.mrk")
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, file_checker(disk, table_path + "sizes.json")
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, max_compress_block_size(max_compress_block_size_)
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, log(&Poco::Logger::get("StorageStripeLog"))
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{
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StorageInMemoryMetadata storage_metadata;
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storage_metadata.setColumns(columns_);
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storage_metadata.setConstraints(constraints_);
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storage_metadata.setComment(comment);
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setInMemoryMetadata(storage_metadata);
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if (relative_path_.empty())
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throw Exception("Storage " + getName() + " requires data path", ErrorCodes::INCORRECT_FILE_NAME);
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/// Ensure the file checker is initialized.
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if (file_checker.empty())
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{
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file_checker.setEmpty(data_file_path);
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file_checker.setEmpty(index_file_path);
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}
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if (!attach)
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{
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/// create directories if they do not exist
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disk->createDirectories(table_path);
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}
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else
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{
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try
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{
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file_checker.repair();
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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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}
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StorageStripeLog::~StorageStripeLog() = default;
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void StorageStripeLog::rename(const String & new_path_to_table_data, const StorageID & new_table_id)
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{
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assert(table_path != new_path_to_table_data);
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{
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disk->moveDirectory(table_path, new_path_to_table_data);
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table_path = new_path_to_table_data;
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data_file_path = table_path + "data.bin";
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index_file_path = table_path + "index.mrk";
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file_checker.setPath(table_path + "sizes.json");
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}
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renameInMemory(new_table_id);
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}
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static std::chrono::seconds getLockTimeout(ContextPtr context)
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{
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const Settings & settings = context->getSettingsRef();
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Int64 lock_timeout = settings.lock_acquire_timeout.totalSeconds();
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if (settings.max_execution_time.totalSeconds() != 0 && settings.max_execution_time.totalSeconds() < lock_timeout)
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lock_timeout = settings.max_execution_time.totalSeconds();
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return std::chrono::seconds{lock_timeout};
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}
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Pipe StorageStripeLog::read(
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const Names & column_names,
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const StorageMetadataPtr & metadata_snapshot,
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SelectQueryInfo & /*query_info*/,
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ContextPtr context,
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QueryProcessingStage::Enum /*processed_stage*/,
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const size_t /*max_block_size*/,
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unsigned num_streams)
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{
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metadata_snapshot->check(column_names, getVirtuals(), getStorageID());
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auto lock_timeout = getLockTimeout(context);
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loadIndices(lock_timeout);
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ReadLock lock{rwlock, lock_timeout};
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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size_t data_file_size = file_checker.getFileSize(data_file_path);
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if (!data_file_size)
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return Pipe(std::make_shared<NullSource>(metadata_snapshot->getSampleBlockForColumns(column_names, getVirtuals(), getStorageID())));
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auto indices_for_selected_columns
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= std::make_shared<IndexForNativeFormat>(indices.extractIndexForColumns(NameSet{column_names.begin(), column_names.end()}));
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size_t size = indices_for_selected_columns->blocks.size();
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if (num_streams > size)
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num_streams = size;
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ReadSettings read_settings = context->getReadSettings();
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Pipes pipes;
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for (size_t stream = 0; stream < num_streams; ++stream)
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{
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IndexForNativeFormat::Blocks::const_iterator begin = indices_for_selected_columns->blocks.begin();
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IndexForNativeFormat::Blocks::const_iterator end = indices_for_selected_columns->blocks.begin();
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std::advance(begin, stream * size / num_streams);
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std::advance(end, (stream + 1) * size / num_streams);
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pipes.emplace_back(std::make_shared<StripeLogSource>(
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*this, metadata_snapshot, column_names, read_settings, indices_for_selected_columns, begin, end, data_file_size));
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}
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/// We do not keep read lock directly at the time of reading, because we read ranges of data that do not change.
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return Pipe::unitePipes(std::move(pipes));
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}
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SinkToStoragePtr StorageStripeLog::write(const ASTPtr & /*query*/, const StorageMetadataPtr & metadata_snapshot, ContextPtr context)
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{
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WriteLock lock{rwlock, getLockTimeout(context)};
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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return std::make_shared<StripeLogSink>(*this, metadata_snapshot, std::move(lock));
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}
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CheckResults StorageStripeLog::checkData(const ASTPtr & /* query */, ContextPtr context)
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{
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ReadLock lock{rwlock, getLockTimeout(context)};
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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return file_checker.check();
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}
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void StorageStripeLog::truncate(const ASTPtr &, const StorageMetadataPtr &, ContextPtr, TableExclusiveLockHolder &)
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{
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disk->clearDirectory(table_path);
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indices.clear();
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file_checker.setEmpty(data_file_path);
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file_checker.setEmpty(index_file_path);
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indices_loaded = true;
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num_indices_saved = 0;
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}
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void StorageStripeLog::loadIndices(std::chrono::seconds lock_timeout)
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{
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if (indices_loaded)
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return;
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/// We load indices with an exclusive lock (i.e. the write lock) because we don't want
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/// a data race between two threads trying to load indices simultaneously.
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WriteLock lock{rwlock, lock_timeout};
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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loadIndices(lock);
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}
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void StorageStripeLog::loadIndices(const WriteLock & /* already locked exclusively */)
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{
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if (indices_loaded)
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return;
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if (disk->exists(index_file_path))
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{
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CompressedReadBufferFromFile index_in(disk->readFile(index_file_path, ReadSettings{}.adjustBufferSize(4096)));
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indices.read(index_in);
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}
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indices_loaded = true;
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num_indices_saved = indices.blocks.size();
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}
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void StorageStripeLog::saveIndices(const WriteLock & /* already locked for writing */)
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{
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size_t num_indices = indices.blocks.size();
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if (num_indices_saved == num_indices)
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return;
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size_t start = num_indices_saved;
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auto index_out_compressed = disk->writeFile(index_file_path, DBMS_DEFAULT_BUFFER_SIZE, WriteMode::Append);
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auto index_out = std::make_unique<CompressedWriteBuffer>(*index_out_compressed);
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for (size_t i = start; i != num_indices; ++i)
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indices.blocks[i].write(*index_out);
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index_out->next();
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index_out_compressed->next();
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index_out_compressed->finalize();
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num_indices_saved = num_indices;
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}
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void StorageStripeLog::removeUnsavedIndices(const WriteLock & /* already locked for writing */)
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{
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if (indices.blocks.size() > num_indices_saved)
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indices.blocks.resize(num_indices_saved);
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}
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void StorageStripeLog::saveFileSizes(const WriteLock & /* already locked for writing */)
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{
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file_checker.update(data_file_path);
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file_checker.update(index_file_path);
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file_checker.save();
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}
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BackupEntries StorageStripeLog::backup(const ASTs & partitions, ContextPtr context)
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{
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if (!partitions.empty())
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throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Table engine {} doesn't support partitions", getName());
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auto lock_timeout = getLockTimeout(context);
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loadIndices(lock_timeout);
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ReadLock lock{rwlock, lock_timeout};
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if (!lock)
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throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
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if (!file_checker.getFileSize(data_file_path))
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return {};
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auto temp_dir_owner = std::make_shared<TemporaryFileOnDisk>(disk, "tmp/backup_");
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auto temp_dir = temp_dir_owner->getPath();
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disk->createDirectories(temp_dir);
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BackupEntries backup_entries;
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/// data.bin
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{
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/// We make a copy of the data file because it can be changed later in write() or in truncate().
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String data_file_name = fileName(data_file_path);
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String temp_file_path = temp_dir + "/" + data_file_name;
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disk->copy(data_file_path, disk, temp_file_path);
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backup_entries.emplace_back(
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data_file_name,
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std::make_unique<BackupEntryFromImmutableFile>(
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disk, temp_file_path, file_checker.getFileSize(data_file_path), std::nullopt, temp_dir_owner));
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}
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/// index.mrk
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{
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/// We make a copy of the data file because it can be changed later in write() or in truncate().
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String index_file_name = fileName(index_file_path);
|
|
String temp_file_path = temp_dir + "/" + index_file_name;
|
|
disk->copy(index_file_path, disk, temp_file_path);
|
|
backup_entries.emplace_back(
|
|
index_file_name,
|
|
std::make_unique<BackupEntryFromImmutableFile>(
|
|
disk, temp_file_path, file_checker.getFileSize(index_file_path), std::nullopt, temp_dir_owner));
|
|
}
|
|
|
|
/// sizes.json
|
|
String files_info_path = file_checker.getPath();
|
|
backup_entries.emplace_back(fileName(files_info_path), std::make_unique<BackupEntryFromSmallFile>(disk, files_info_path));
|
|
|
|
/// columns.txt
|
|
backup_entries.emplace_back(
|
|
"columns.txt", std::make_unique<BackupEntryFromMemory>(getInMemoryMetadata().getColumns().getAllPhysical().toString()));
|
|
|
|
/// count.txt
|
|
size_t num_rows = 0;
|
|
for (const auto & block : indices.blocks)
|
|
num_rows += block.num_rows;
|
|
backup_entries.emplace_back("count.txt", std::make_unique<BackupEntryFromMemory>(toString(num_rows)));
|
|
|
|
return backup_entries;
|
|
}
|
|
|
|
RestoreDataTasks StorageStripeLog::restoreFromBackup(const BackupPtr & backup, const String & data_path_in_backup, const ASTs & partitions, ContextMutablePtr context)
|
|
{
|
|
if (!partitions.empty())
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Table engine {} doesn't support partitions", getName());
|
|
|
|
auto restore_task = [this, backup, data_path_in_backup, context]()
|
|
{
|
|
WriteLock lock{rwlock, getLockTimeout(context)};
|
|
if (!lock)
|
|
throw Exception("Lock timeout exceeded", ErrorCodes::TIMEOUT_EXCEEDED);
|
|
|
|
/// Load the indices if not loaded yet. We have to do that now because we're going to update these indices.
|
|
loadIndices(lock);
|
|
|
|
/// If there were no files, save zero file sizes to be able to rollback in case of error.
|
|
saveFileSizes(lock);
|
|
|
|
try
|
|
{
|
|
/// Append the data file.
|
|
auto old_data_size = file_checker.getFileSize(data_file_path);
|
|
{
|
|
String file_path_in_backup = data_path_in_backup + fileName(data_file_path);
|
|
auto backup_entry = backup->readFile(file_path_in_backup);
|
|
auto in = backup_entry->getReadBuffer();
|
|
auto out = disk->writeFile(data_file_path, max_compress_block_size, WriteMode::Append);
|
|
copyData(*in, *out);
|
|
}
|
|
|
|
/// Append the index.
|
|
{
|
|
String index_path_in_backup = data_path_in_backup + fileName(index_file_path);
|
|
IndexForNativeFormat extra_indices;
|
|
auto backup_entry = backup->readFile(index_path_in_backup);
|
|
auto index_in = backup_entry->getReadBuffer();
|
|
CompressedReadBuffer index_compressed_in{*index_in};
|
|
extra_indices.read(index_compressed_in);
|
|
|
|
/// Adjust the offsets.
|
|
for (auto & block : extra_indices.blocks)
|
|
{
|
|
for (auto & column : block.columns)
|
|
column.location.offset_in_compressed_file += old_data_size;
|
|
}
|
|
|
|
insertAtEnd(indices.blocks, std::move(extra_indices.blocks));
|
|
}
|
|
|
|
/// Finish writing.
|
|
saveIndices(lock);
|
|
saveFileSizes(lock);
|
|
}
|
|
catch (...)
|
|
{
|
|
/// Rollback partial writes.
|
|
file_checker.repair();
|
|
removeUnsavedIndices(lock);
|
|
throw;
|
|
}
|
|
|
|
};
|
|
return {restore_task};
|
|
}
|
|
|
|
|
|
void registerStorageStripeLog(StorageFactory & factory)
|
|
{
|
|
StorageFactory::StorageFeatures features{
|
|
.supports_settings = true
|
|
};
|
|
|
|
factory.registerStorage("StripeLog", [](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);
|
|
|
|
String disk_name = getDiskName(*args.storage_def);
|
|
DiskPtr disk = args.getContext()->getDisk(disk_name);
|
|
|
|
return StorageStripeLog::create(
|
|
disk,
|
|
args.relative_data_path,
|
|
args.table_id,
|
|
args.columns,
|
|
args.constraints,
|
|
args.comment,
|
|
args.attach,
|
|
args.getContext()->getSettings().max_compress_block_size);
|
|
}, features);
|
|
}
|
|
|
|
}
|