mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-03 05:54:17 +00:00
20d18a89a3
Summary: disable size compaction in ldb reduce_levels, this will avoid compactions rather than the manual comapction, added --compression=none|snappy|zlib|bzip2 and --file_size= per-file size to ldb reduce_levels command Test Plan: run ldb Reviewers: dhruba, MarkCallaghan Reviewed By: dhruba CC: sheki, emayanke Differential Revision: https://reviews.facebook.net/D6597
75 lines
2 KiB
C++
75 lines
2 KiB
C++
// Copyright (c) 2012 Facebook. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "db/version_set.h"
|
|
|
|
#include <algorithm>
|
|
#include <stdio.h>
|
|
#include "db/log_reader.h"
|
|
#include "db/log_writer.h"
|
|
#include "util/logging.h"
|
|
|
|
namespace leveldb {
|
|
|
|
Status VersionSet::ReduceNumberOfLevels(int new_levels, port::Mutex* mu) {
|
|
|
|
if(new_levels <= 1) {
|
|
return Status::InvalidArgument(
|
|
"Number of levels needs to be bigger than 1");
|
|
}
|
|
|
|
Version* current_version = current_;
|
|
int current_levels = NumberLevels();
|
|
|
|
if (current_levels <= new_levels) {
|
|
return Status::OK();
|
|
}
|
|
|
|
// Make sure there are file only on one level from
|
|
// (new_levels-1) to (current_levels-1)
|
|
int first_nonempty_level = -1;
|
|
int first_nonempty_level_filenum = 0;
|
|
for (int i = new_levels - 1; i < current_levels; i++) {
|
|
int file_num = NumLevelFiles(i);
|
|
if (file_num != 0) {
|
|
if (first_nonempty_level < 0) {
|
|
first_nonempty_level = i;
|
|
first_nonempty_level_filenum = file_num;
|
|
} else {
|
|
char msg[255];
|
|
sprintf(msg, "Found at least two levels containing files: "
|
|
"[%d:%d],[%d:%d].\n",
|
|
first_nonempty_level, first_nonempty_level_filenum, i, file_num);
|
|
return Status::InvalidArgument(msg);
|
|
}
|
|
}
|
|
}
|
|
|
|
Status st;
|
|
std::vector<FileMetaData*>* old_files_list = current_version->files_;
|
|
std::vector<FileMetaData*>* new_files_list =
|
|
new std::vector<FileMetaData*>[new_levels];
|
|
for (int i = 0; i < new_levels - 1; i++) {
|
|
new_files_list[i] = old_files_list[i];
|
|
}
|
|
|
|
if (first_nonempty_level > 0) {
|
|
new_files_list[new_levels - 1] = old_files_list[first_nonempty_level];
|
|
}
|
|
|
|
delete[] current_version->files_;
|
|
current_version->files_ = new_files_list;
|
|
|
|
delete[] compact_pointer_;
|
|
delete[] max_file_size_;
|
|
delete[] level_max_bytes_;
|
|
num_levels_ = new_levels;
|
|
compact_pointer_ = new std::string[new_levels];
|
|
Init(new_levels);
|
|
st = LogAndApply(new VersionEdit(new_levels), mu, true);
|
|
return st;
|
|
}
|
|
|
|
}
|