1f8b119ed6
Summary: Extend TransactionOptions to include max_write_batch_size which determines the maximum size of the writebatch representation. If memory limit is exceeded, the operation will abort with subcode kMemoryLimit. Closes https://github.com/facebook/rocksdb/pull/2124 Differential Revision: D4861842 Pulled By: lth fbshipit-source-id: 46fd172ea67cc90bbba829bf0d70cfab2261c161
228 lines
8.1 KiB
C++
228 lines
8.1 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include <vector>
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#include "db/write_thread.h"
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#include "rocksdb/types.h"
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#include "rocksdb/write_batch.h"
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#include "rocksdb/db.h"
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#include "rocksdb/options.h"
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#include "util/autovector.h"
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namespace rocksdb {
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class MemTable;
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class FlushScheduler;
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class ColumnFamilyData;
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class ColumnFamilyMemTables {
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public:
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virtual ~ColumnFamilyMemTables() {}
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virtual bool Seek(uint32_t column_family_id) = 0;
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// returns true if the update to memtable should be ignored
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// (useful when recovering from log whose updates have already
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// been processed)
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virtual uint64_t GetLogNumber() const = 0;
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virtual MemTable* GetMemTable() const = 0;
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virtual ColumnFamilyHandle* GetColumnFamilyHandle() = 0;
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virtual ColumnFamilyData* current() { return nullptr; }
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};
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class ColumnFamilyMemTablesDefault : public ColumnFamilyMemTables {
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public:
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explicit ColumnFamilyMemTablesDefault(MemTable* mem)
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: ok_(false), mem_(mem) {}
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bool Seek(uint32_t column_family_id) override {
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ok_ = (column_family_id == 0);
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return ok_;
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}
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uint64_t GetLogNumber() const override { return 0; }
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MemTable* GetMemTable() const override {
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assert(ok_);
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return mem_;
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}
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ColumnFamilyHandle* GetColumnFamilyHandle() override { return nullptr; }
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private:
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bool ok_;
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MemTable* mem_;
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};
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// WriteBatchInternal provides static methods for manipulating a
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// WriteBatch that we don't want in the public WriteBatch interface.
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class WriteBatchInternal {
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public:
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// WriteBatch header has an 8-byte sequence number followed by a 4-byte count.
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static const size_t kHeader = 12;
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// WriteBatch methods with column_family_id instead of ColumnFamilyHandle*
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static Status Put(WriteBatch* batch, uint32_t column_family_id,
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const Slice& key, const Slice& value);
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static Status Put(WriteBatch* batch, uint32_t column_family_id,
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const SliceParts& key, const SliceParts& value);
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static Status Delete(WriteBatch* batch, uint32_t column_family_id,
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const SliceParts& key);
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static Status Delete(WriteBatch* batch, uint32_t column_family_id,
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const Slice& key);
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static Status SingleDelete(WriteBatch* batch, uint32_t column_family_id,
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const SliceParts& key);
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static Status SingleDelete(WriteBatch* batch, uint32_t column_family_id,
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const Slice& key);
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static Status DeleteRange(WriteBatch* b, uint32_t column_family_id,
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const Slice& begin_key, const Slice& end_key);
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static Status DeleteRange(WriteBatch* b, uint32_t column_family_id,
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const SliceParts& begin_key,
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const SliceParts& end_key);
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static Status Merge(WriteBatch* batch, uint32_t column_family_id,
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const Slice& key, const Slice& value);
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static Status Merge(WriteBatch* batch, uint32_t column_family_id,
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const SliceParts& key, const SliceParts& value);
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static Status MarkEndPrepare(WriteBatch* batch, const Slice& xid);
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static Status MarkRollback(WriteBatch* batch, const Slice& xid);
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static Status MarkCommit(WriteBatch* batch, const Slice& xid);
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static Status InsertNoop(WriteBatch* batch);
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// Return the number of entries in the batch.
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static int Count(const WriteBatch* batch);
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// Set the count for the number of entries in the batch.
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static void SetCount(WriteBatch* batch, int n);
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// Return the seqeunce number for the start of this batch.
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static SequenceNumber Sequence(const WriteBatch* batch);
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// Store the specified number as the seqeunce number for the start of
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// this batch.
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static void SetSequence(WriteBatch* batch, SequenceNumber seq);
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// Returns the offset of the first entry in the batch.
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// This offset is only valid if the batch is not empty.
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static size_t GetFirstOffset(WriteBatch* batch);
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static Slice Contents(const WriteBatch* batch) {
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return Slice(batch->rep_);
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}
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static size_t ByteSize(const WriteBatch* batch) {
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return batch->rep_.size();
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}
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static Status SetContents(WriteBatch* batch, const Slice& contents);
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// Inserts batches[i] into memtable, for i in 0..num_batches-1 inclusive.
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//
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// If ignore_missing_column_families == true. WriteBatch
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// referencing non-existing column family will be ignored.
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// If ignore_missing_column_families == false, processing of the
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// batches will be stopped if a reference is found to a non-existing
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// column family and InvalidArgument() will be returned. The writes
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// in batches may be only partially applied at that point.
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//
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// If log_number is non-zero, the memtable will be updated only if
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// memtables->GetLogNumber() >= log_number.
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//
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// If flush_scheduler is non-null, it will be invoked if the memtable
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// should be flushed.
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//
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// Under concurrent use, the caller is responsible for making sure that
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// the memtables object itself is thread-local.
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static Status InsertInto(const autovector<WriteThread::Writer*>& batches,
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SequenceNumber sequence,
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ColumnFamilyMemTables* memtables,
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FlushScheduler* flush_scheduler,
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bool ignore_missing_column_families = false,
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uint64_t log_number = 0, DB* db = nullptr,
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bool concurrent_memtable_writes = false);
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// Convenience form of InsertInto when you have only one batch
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// last_seq_used returns the last sequnce number used in a MemTable insert
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static Status InsertInto(const WriteBatch* batch,
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ColumnFamilyMemTables* memtables,
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FlushScheduler* flush_scheduler,
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bool ignore_missing_column_families = false,
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uint64_t log_number = 0, DB* db = nullptr,
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bool concurrent_memtable_writes = false,
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SequenceNumber* last_seq_used = nullptr,
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bool* has_valid_writes = nullptr);
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static Status InsertInto(WriteThread::Writer* writer,
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ColumnFamilyMemTables* memtables,
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FlushScheduler* flush_scheduler,
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bool ignore_missing_column_families = false,
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uint64_t log_number = 0, DB* db = nullptr,
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bool concurrent_memtable_writes = false);
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static Status Append(WriteBatch* dst, const WriteBatch* src,
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const bool WAL_only = false);
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// Returns the byte size of appending a WriteBatch with ByteSize
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// leftByteSize and a WriteBatch with ByteSize rightByteSize
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static size_t AppendedByteSize(size_t leftByteSize, size_t rightByteSize);
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};
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// LocalSavePoint is similar to a scope guard
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class LocalSavePoint {
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public:
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explicit LocalSavePoint(WriteBatch* batch)
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: batch_(batch),
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savepoint_(batch->GetDataSize(), batch->Count(),
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batch->content_flags_.load(std::memory_order_relaxed))
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#ifndef NDEBUG
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,
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committed_(false)
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#endif
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{
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}
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#ifndef NDEBUG
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~LocalSavePoint() { assert(committed_); }
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#endif
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Status commit() {
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#ifndef NDEBUG
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committed_ = true;
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#endif
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if (batch_->max_bytes_ && batch_->rep_.size() > batch_->max_bytes_) {
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batch_->rep_.resize(savepoint_.size);
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WriteBatchInternal::SetCount(batch_, savepoint_.count);
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batch_->content_flags_.store(savepoint_.content_flags,
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std::memory_order_relaxed);
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return Status::MemoryLimit();
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}
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return Status::OK();
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}
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private:
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WriteBatch* batch_;
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SavePoint savepoint_;
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#ifndef NDEBUG
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bool committed_;
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#endif
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};
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} // namespace rocksdb
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