rocksdb/util/mutable_cf_options.cc
Lei Jin 5ec53f3edf make compaction related options changeable
Summary:
make compaction related options changeable. Most of changes are tedious,
following the same convention: grabs MutableCFOptions at the beginning
of compaction under mutex, then pass it throughout the job and register
it in SuperVersion at the end.

Test Plan: make all check

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23349
2014-10-01 16:19:16 -07:00

73 lines
2.5 KiB
C++

// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include <limits>
#include <cassert>
#include "rocksdb/options.h"
#include "rocksdb/immutable_options.h"
#include "util/mutable_cf_options.h"
namespace rocksdb {
namespace {
// Multiple two operands. If they overflow, return op1.
uint64_t MultiplyCheckOverflow(uint64_t op1, int op2) {
if (op1 == 0) {
return 0;
}
if (op2 <= 0) {
return op1;
}
uint64_t casted_op2 = (uint64_t) op2;
if (std::numeric_limits<uint64_t>::max() / op1 < casted_op2) {
return op1;
}
return op1 * casted_op2;
}
} // anonymous namespace
void MutableCFOptions::RefreshDerivedOptions(
const ImmutableCFOptions& ioptions) {
max_file_size.resize(ioptions.num_levels);
level_max_bytes.resize(ioptions.num_levels);
for (int i = 0; i < ioptions.num_levels; ++i) {
if (i == 0 && ioptions.compaction_style == kCompactionStyleUniversal) {
max_file_size[i] = ULLONG_MAX;
level_max_bytes[i] = max_bytes_for_level_base;
} else if (i > 1) {
max_file_size[i] = MultiplyCheckOverflow(max_file_size[i - 1],
target_file_size_multiplier);
level_max_bytes[i] = MultiplyCheckOverflow(
MultiplyCheckOverflow(level_max_bytes[i - 1],
max_bytes_for_level_multiplier),
max_bytes_for_level_multiplier_additional[i - 1]);
} else {
max_file_size[i] = target_file_size_base;
level_max_bytes[i] = max_bytes_for_level_base;
}
}
}
uint64_t MutableCFOptions::MaxFileSizeForLevel(int level) const {
assert(level >= 0);
assert(level < (int)max_file_size.size());
return max_file_size[level];
}
uint64_t MutableCFOptions::MaxBytesForLevel(int level) const {
// Note: the result for level zero is not really used since we set
// the level-0 compaction threshold based on number of files.
assert(level >= 0);
assert(level < (int)level_max_bytes.size());
return level_max_bytes[level];
}
uint64_t MutableCFOptions::MaxGrandParentOverlapBytes(int level) const {
return MaxFileSizeForLevel(level) * max_grandparent_overlap_factor;
}
uint64_t MutableCFOptions::ExpandedCompactionByteSizeLimit(int level) const {
return MaxFileSizeForLevel(level) * expanded_compaction_factor;
}
} // namespace rocksdb