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rocksdb/include/rocksdb/experimental.h

56 lines
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include "rocksdb/db.h"
#include "rocksdb/status.h"
namespace ROCKSDB_NAMESPACE {
namespace experimental {
// Supported only for Leveled compaction
Status SuggestCompactRange(DB* db, ColumnFamilyHandle* column_family,
const Slice* begin, const Slice* end);
Status SuggestCompactRange(DB* db, const Slice* begin, const Slice* end);
// Move all L0 files to target_level skipping compaction.
// This operation succeeds only if the files in L0 have disjoint ranges; this
// is guaranteed to happen, for instance, if keys are inserted in sorted
// order. Furthermore, all levels between 1 and target_level must be empty.
// If any of the above condition is violated, InvalidArgument will be
// returned.
Status PromoteL0(DB* db, ColumnFamilyHandle* column_family,
int target_level = 1);
struct UpdateManifestForFilesStateOptions {
// When true, read current file temperatures from FileSystem and update in
// DB manifest when a temperature other than Unknown is reported and
// inconsistent with manifest.
bool update_temperatures = true;
// TODO: new_checksums: to update files to latest file checksum algorithm
};
// Utility for updating manifest of DB directory (not open) for current state
// of files on filesystem. See UpdateManifestForFilesStateOptions.
//
// To minimize interference with ongoing DB operations, only the following
// guarantee is provided, assuming no IO error encountered:
// * Only files live in DB at start AND end of call to
// UpdateManifestForFilesState() are guaranteed to be updated (as needed) in
// manifest.
// * For example, new files after start of call to
// UpdateManifestForFilesState() might not be updated, but that is not
// typically required to achieve goal of manifest consistency/completeness
// (because current DB configuration would ensure new files get the desired
// consistent metadata).
Status UpdateManifestForFilesState(
const DBOptions& db_opts, const std::string& db_name,
const std::vector<ColumnFamilyDescriptor>& column_families,
const UpdateManifestForFilesStateOptions& opts = {});
} // namespace experimental
} // namespace ROCKSDB_NAMESPACE