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rocksdb/util/ldb_cmd.cc
Igor Canadi a2bb7c3c33 Push- instead of pull-model for managing Write stalls 
Summary:
Introducing WriteController, which is a source of truth about per-DB write delays. Let's define an DB epoch as a period where there are no flushes and compactions (i.e. new epoch is started when flush or compaction finishes). Each epoch can either:
* proceed with all writes without delay
* delay all writes by fixed time
* stop all writes

The three modes are recomputed at each epoch change (flush, compaction), rather than on every write (which is currently the case).

When we have a lot of column families, our current pull behavior adds a big overhead, since we need to loop over every column family for every write. With new push model, overhead on Write code-path is minimal.

This is just the start. Next step is to also take care of stalls introduced by slow memtable flushes. The final goal is to eliminate function MakeRoomForWrite(), which currently needs to be called for every column family by every write.

Test Plan: make check for now. I'll add some unit tests later. Also, perf test.

Reviewers: dhruba, yhchiang, MarkCallaghan, sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22791
2014-09-08 11:20:25 -07:00

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// Copyright (c) 2013, 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.
//
#ifndef ROCKSDB_LITE
#include "util/ldb_cmd.h"
#include "db/dbformat.h"
#include "db/db_impl.h"
#include "db/log_reader.h"
#include "db/filename.h"
#include "db/write_batch_internal.h"
#include "rocksdb/write_batch.h"
#include "rocksdb/cache.h"
#include "util/coding.h"
#include "util/scoped_arena_iterator.h"
#include "utilities/ttl/db_ttl_impl.h"
#include <ctime>
#include <dirent.h>
#include <limits>
#include <sstream>
#include <string>
#include <stdexcept>
namespace rocksdb {
using namespace std;
const string LDBCommand::ARG_DB = "db";
const string LDBCommand::ARG_HEX = "hex";
const string LDBCommand::ARG_KEY_HEX = "key_hex";
const string LDBCommand::ARG_VALUE_HEX = "value_hex";
const string LDBCommand::ARG_TTL = "ttl";
const string LDBCommand::ARG_TTL_START = "start_time";
const string LDBCommand::ARG_TTL_END = "end_time";
const string LDBCommand::ARG_TIMESTAMP = "timestamp";
const string LDBCommand::ARG_FROM = "from";
const string LDBCommand::ARG_TO = "to";
const string LDBCommand::ARG_MAX_KEYS = "max_keys";
const string LDBCommand::ARG_BLOOM_BITS = "bloom_bits";
const string LDBCommand::ARG_COMPRESSION_TYPE = "compression_type";
const string LDBCommand::ARG_BLOCK_SIZE = "block_size";
const string LDBCommand::ARG_AUTO_COMPACTION = "auto_compaction";
const string LDBCommand::ARG_WRITE_BUFFER_SIZE = "write_buffer_size";
const string LDBCommand::ARG_FILE_SIZE = "file_size";
const string LDBCommand::ARG_CREATE_IF_MISSING = "create_if_missing";
const char* LDBCommand::DELIM = " ==> ";
LDBCommand* LDBCommand::InitFromCmdLineArgs(
int argc,
char** argv,
const Options& options,
const LDBOptions& ldb_options
) {
vector<string> args;
for (int i = 1; i < argc; i++) {
args.push_back(argv[i]);
}
return InitFromCmdLineArgs(args, options, ldb_options);
}
/**
* Parse the command-line arguments and create the appropriate LDBCommand2
* instance.
* The command line arguments must be in the following format:
* ./ldb --db=PATH_TO_DB [--commonOpt1=commonOpt1Val] ..
* COMMAND <PARAM1> <PARAM2> ... [-cmdSpecificOpt1=cmdSpecificOpt1Val] ..
* This is similar to the command line format used by HBaseClientTool.
* Command name is not included in args.
* Returns nullptr if the command-line cannot be parsed.
*/
LDBCommand* LDBCommand::InitFromCmdLineArgs(
const vector<string>& args,
const Options& options,
const LDBOptions& ldb_options
) {
// --x=y command line arguments are added as x->y map entries.
map<string, string> option_map;
// Command-line arguments of the form --hex end up in this array as hex
vector<string> flags;
// Everything other than option_map and flags. Represents commands
// and their parameters. For eg: put key1 value1 go into this vector.
vector<string> cmdTokens;
const string OPTION_PREFIX = "--";
for (const auto& arg : args) {
if (arg[0] == '-' && arg[1] == '-'){
vector<string> splits = stringSplit(arg, '=');
if (splits.size() == 2) {
string optionKey = splits[0].substr(OPTION_PREFIX.size());
option_map[optionKey] = splits[1];
} else {
string optionKey = splits[0].substr(OPTION_PREFIX.size());
flags.push_back(optionKey);
}
} else {
cmdTokens.push_back(arg);
}
}
if (cmdTokens.size() < 1) {
fprintf(stderr, "Command not specified!");
return nullptr;
}
string cmd = cmdTokens[0];
vector<string> cmdParams(cmdTokens.begin()+1, cmdTokens.end());
LDBCommand* command = LDBCommand::SelectCommand(
cmd,
cmdParams,
option_map,
flags
);
if (command) {
command->SetDBOptions(options);
command->SetLDBOptions(ldb_options);
}
return command;
}
LDBCommand* LDBCommand::SelectCommand(
const std::string& cmd,
const vector<string>& cmdParams,
const map<string, string>& option_map,
const vector<string>& flags
) {
if (cmd == GetCommand::Name()) {
return new GetCommand(cmdParams, option_map, flags);
} else if (cmd == PutCommand::Name()) {
return new PutCommand(cmdParams, option_map, flags);
} else if (cmd == BatchPutCommand::Name()) {
return new BatchPutCommand(cmdParams, option_map, flags);
} else if (cmd == ScanCommand::Name()) {
return new ScanCommand(cmdParams, option_map, flags);
} else if (cmd == DeleteCommand::Name()) {
return new DeleteCommand(cmdParams, option_map, flags);
} else if (cmd == ApproxSizeCommand::Name()) {
return new ApproxSizeCommand(cmdParams, option_map, flags);
} else if (cmd == DBQuerierCommand::Name()) {
return new DBQuerierCommand(cmdParams, option_map, flags);
} else if (cmd == CompactorCommand::Name()) {
return new CompactorCommand(cmdParams, option_map, flags);
} else if (cmd == WALDumperCommand::Name()) {
return new WALDumperCommand(cmdParams, option_map, flags);
} else if (cmd == ReduceDBLevelsCommand::Name()) {
return new ReduceDBLevelsCommand(cmdParams, option_map, flags);
} else if (cmd == ChangeCompactionStyleCommand::Name()) {
return new ChangeCompactionStyleCommand(cmdParams, option_map, flags);
} else if (cmd == DBDumperCommand::Name()) {
return new DBDumperCommand(cmdParams, option_map, flags);
} else if (cmd == DBLoaderCommand::Name()) {
return new DBLoaderCommand(cmdParams, option_map, flags);
} else if (cmd == ManifestDumpCommand::Name()) {
return new ManifestDumpCommand(cmdParams, option_map, flags);
} else if (cmd == ListColumnFamiliesCommand::Name()) {
return new ListColumnFamiliesCommand(cmdParams, option_map, flags);
} else if (cmd == InternalDumpCommand::Name()) {
return new InternalDumpCommand(cmdParams, option_map, flags);
} else if (cmd == CheckConsistencyCommand::Name()) {
return new CheckConsistencyCommand(cmdParams, option_map, flags);
}
return nullptr;
}
/**
* Parses the specific integer option and fills in the value.
* Returns true if the option is found.
* Returns false if the option is not found or if there is an error parsing the
* value. If there is an error, the specified exec_state is also
* updated.
*/
bool LDBCommand::ParseIntOption(const map<string, string>& options,
const string& option, int& value,
LDBCommandExecuteResult& exec_state) {
map<string, string>::const_iterator itr = option_map_.find(option);
if (itr != option_map_.end()) {
try {
value = stoi(itr->second);
return true;
} catch(const invalid_argument&) {
exec_state = LDBCommandExecuteResult::FAILED(option +
" has an invalid value.");
} catch(const out_of_range&) {
exec_state = LDBCommandExecuteResult::FAILED(option +
" has a value out-of-range.");
}
}
return false;
}
/**
* Parses the specified option and fills in the value.
* Returns true if the option is found.
* Returns false otherwise.
*/
bool LDBCommand::ParseStringOption(const map<string, string>& options,
const string& option, string* value) {
auto itr = option_map_.find(option);
if (itr != option_map_.end()) {
*value = itr->second;
return true;
}
return false;
}
Options LDBCommand::PrepareOptionsForOpenDB() {
Options opt = options_;
opt.create_if_missing = false;
map<string, string>::const_iterator itr;
BlockBasedTableOptions table_options;
int bits;
if (ParseIntOption(option_map_, ARG_BLOOM_BITS, bits, exec_state_)) {
if (bits > 0) {
table_options.filter_policy.reset(NewBloomFilterPolicy(bits));
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_BLOOM_BITS +
" must be > 0.");
}
}
int block_size;
if (ParseIntOption(option_map_, ARG_BLOCK_SIZE, block_size, exec_state_)) {
if (block_size > 0) {
table_options.block_size = block_size;
opt.table_factory.reset(NewBlockBasedTableFactory(table_options));
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_BLOCK_SIZE +
" must be > 0.");
}
}
itr = option_map_.find(ARG_AUTO_COMPACTION);
if (itr != option_map_.end()) {
opt.disable_auto_compactions = ! StringToBool(itr->second);
}
itr = option_map_.find(ARG_COMPRESSION_TYPE);
if (itr != option_map_.end()) {
string comp = itr->second;
if (comp == "no") {
opt.compression = kNoCompression;
} else if (comp == "snappy") {
opt.compression = kSnappyCompression;
} else if (comp == "zlib") {
opt.compression = kZlibCompression;
} else if (comp == "bzip2") {
opt.compression = kBZip2Compression;
} else if (comp == "lz4") {
opt.compression = kLZ4Compression;
} else if (comp == "lz4hc") {
opt.compression = kLZ4HCCompression;
} else {
// Unknown compression.
exec_state_ = LDBCommandExecuteResult::FAILED(
"Unknown compression level: " + comp);
}
}
int write_buffer_size;
if (ParseIntOption(option_map_, ARG_WRITE_BUFFER_SIZE, write_buffer_size,
exec_state_)) {
if (write_buffer_size > 0) {
opt.write_buffer_size = write_buffer_size;
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_WRITE_BUFFER_SIZE +
" must be > 0.");
}
}
int file_size;
if (ParseIntOption(option_map_, ARG_FILE_SIZE, file_size, exec_state_)) {
if (file_size > 0) {
opt.target_file_size_base = file_size;
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_FILE_SIZE +
" must be > 0.");
}
}
if (opt.db_paths.size() == 0) {
opt.db_paths.emplace_back(db_path_, std::numeric_limits<uint64_t>::max());
}
return opt;
}
bool LDBCommand::ParseKeyValue(const string& line, string* key, string* value,
bool is_key_hex, bool is_value_hex) {
size_t pos = line.find(DELIM);
if (pos != string::npos) {
*key = line.substr(0, pos);
*value = line.substr(pos + strlen(DELIM));
if (is_key_hex) {
*key = HexToString(*key);
}
if (is_value_hex) {
*value = HexToString(*value);
}
return true;
} else {
return false;
}
}
/**
* Make sure that ONLY the command-line options and flags expected by this
* command are specified on the command-line. Extraneous options are usually
* the result of user error.
* Returns true if all checks pass. Else returns false, and prints an
* appropriate error msg to stderr.
*/
bool LDBCommand::ValidateCmdLineOptions() {
for (map<string, string>::const_iterator itr = option_map_.begin();
itr != option_map_.end(); itr++) {
if (find(valid_cmd_line_options_.begin(),
valid_cmd_line_options_.end(), itr->first) ==
valid_cmd_line_options_.end()) {
fprintf(stderr, "Invalid command-line option %s\n", itr->first.c_str());
return false;
}
}
for (vector<string>::const_iterator itr = flags_.begin();
itr != flags_.end(); itr++) {
if (find(valid_cmd_line_options_.begin(),
valid_cmd_line_options_.end(), *itr) ==
valid_cmd_line_options_.end()) {
fprintf(stderr, "Invalid command-line flag %s\n", itr->c_str());
return false;
}
}
if (!NoDBOpen() && option_map_.find(ARG_DB) == option_map_.end()) {
fprintf(stderr, "%s must be specified\n", ARG_DB.c_str());
return false;
}
return true;
}
CompactorCommand::CompactorCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_FROM, ARG_TO, ARG_HEX, ARG_KEY_HEX,
ARG_VALUE_HEX, ARG_TTL})),
null_from_(true), null_to_(true) {
map<string, string>::const_iterator itr = options.find(ARG_FROM);
if (itr != options.end()) {
null_from_ = false;
from_ = itr->second;
}
itr = options.find(ARG_TO);
if (itr != options.end()) {
null_to_ = false;
to_ = itr->second;
}
if (is_key_hex_) {
if (!null_from_) {
from_ = HexToString(from_);
}
if (!null_to_) {
to_ = HexToString(to_);
}
}
}
void CompactorCommand::Help(string& ret) {
ret.append(" ");
ret.append(CompactorCommand::Name());
ret.append(HelpRangeCmdArgs());
ret.append("\n");
}
void CompactorCommand::DoCommand() {
Slice* begin = nullptr;
Slice* end = nullptr;
if (!null_from_) {
begin = new Slice(from_);
}
if (!null_to_) {
end = new Slice(to_);
}
db_->CompactRange(begin, end);
exec_state_ = LDBCommandExecuteResult::SUCCEED("");
delete begin;
delete end;
}
const string DBLoaderCommand::ARG_DISABLE_WAL = "disable_wal";
const string DBLoaderCommand::ARG_BULK_LOAD = "bulk_load";
const string DBLoaderCommand::ARG_COMPACT = "compact";
DBLoaderCommand::DBLoaderCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX,
ARG_FROM, ARG_TO, ARG_CREATE_IF_MISSING,
ARG_DISABLE_WAL, ARG_BULK_LOAD,
ARG_COMPACT})),
create_if_missing_(false), disable_wal_(false), bulk_load_(false),
compact_(false) {
create_if_missing_ = IsFlagPresent(flags, ARG_CREATE_IF_MISSING);
disable_wal_ = IsFlagPresent(flags, ARG_DISABLE_WAL);
bulk_load_ = IsFlagPresent(flags, ARG_BULK_LOAD);
compact_ = IsFlagPresent(flags, ARG_COMPACT);
}
void DBLoaderCommand::Help(string& ret) {
ret.append(" ");
ret.append(DBLoaderCommand::Name());
ret.append(" [--" + ARG_CREATE_IF_MISSING + "]");
ret.append(" [--" + ARG_DISABLE_WAL + "]");
ret.append(" [--" + ARG_BULK_LOAD + "]");
ret.append(" [--" + ARG_COMPACT + "]");
ret.append("\n");
}
Options DBLoaderCommand::PrepareOptionsForOpenDB() {
Options opt = LDBCommand::PrepareOptionsForOpenDB();
opt.create_if_missing = create_if_missing_;
if (bulk_load_) {
opt.PrepareForBulkLoad();
}
return opt;
}
void DBLoaderCommand::DoCommand() {
if (!db_) {
return;
}
WriteOptions write_options;
if (disable_wal_) {
write_options.disableWAL = true;
}
int bad_lines = 0;
string line;
while (getline(cin, line, '\n')) {
string key;
string value;
if (ParseKeyValue(line, &key, &value, is_key_hex_, is_value_hex_)) {
db_->Put(write_options, Slice(key), Slice(value));
} else if (0 == line.find("Keys in range:")) {
// ignore this line
} else if (0 == line.find("Created bg thread 0x")) {
// ignore this line
} else {
bad_lines ++;
}
}
if (bad_lines > 0) {
cout << "Warning: " << bad_lines << " bad lines ignored." << endl;
}
if (compact_) {
db_->CompactRange(nullptr, nullptr);
}
}
// ----------------------------------------------------------------------------
const string ManifestDumpCommand::ARG_VERBOSE = "verbose";
const string ManifestDumpCommand::ARG_PATH = "path";
void ManifestDumpCommand::Help(string& ret) {
ret.append(" ");
ret.append(ManifestDumpCommand::Name());
ret.append(" [--" + ARG_VERBOSE + "]");
ret.append(" [--" + ARG_PATH + "=<path_to_manifest_file>]");
ret.append("\n");
}
ManifestDumpCommand::ManifestDumpCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_VERBOSE, ARG_PATH, ARG_HEX})),
verbose_(false),
path_("")
{
verbose_ = IsFlagPresent(flags, ARG_VERBOSE);
map<string, string>::const_iterator itr = options.find(ARG_PATH);
if (itr != options.end()) {
path_ = itr->second;
if (path_.empty()) {
exec_state_ = LDBCommandExecuteResult::FAILED("--path: missing pathname");
}
}
}
void ManifestDumpCommand::DoCommand() {
std::string manifestfile;
if (!path_.empty()) {
manifestfile = path_;
} else {
bool found = false;
// We need to find the manifest file by searching the directory
// containing the db for files of the form MANIFEST_[0-9]+
DIR* d = opendir(db_path_.c_str());
if (d == nullptr) {
exec_state_ = LDBCommandExecuteResult::FAILED(
db_path_ + " is not a directory");
return;
}
struct dirent* entry;
while ((entry = readdir(d)) != nullptr) {
unsigned int match;
unsigned long long num;
if (sscanf(entry->d_name,
"MANIFEST-%ln%ln",
(unsigned long*)&num,
(unsigned long*)&match)
&& match == strlen(entry->d_name)) {
if (!found) {
manifestfile = db_path_ + "/" + std::string(entry->d_name);
found = true;
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Multiple MANIFEST files found; use --path to select one");
closedir(d);
return;
}
}
}
closedir(d);
}
if (verbose_) {
printf("Processing Manifest file %s\n", manifestfile.c_str());
}
Options options;
EnvOptions sopt;
std::string file(manifestfile);
std::string dbname("dummy");
std::shared_ptr<Cache> tc(NewLRUCache(
options.max_open_files - 10, options.table_cache_numshardbits,
options.table_cache_remove_scan_count_limit));
// Notice we are using the default options not through SanitizeOptions(),
// if VersionSet::DumpManifest() depends on any option done by
// SanitizeOptions(), we need to initialize it manually.
options.db_paths.emplace_back("dummy", 0);
WriteController wc;
VersionSet versions(dbname, &options, sopt, tc.get(), &wc);
Status s = versions.DumpManifest(options, file, verbose_, is_key_hex_);
if (!s.ok()) {
printf("Error in processing file %s %s\n", manifestfile.c_str(),
s.ToString().c_str());
}
if (verbose_) {
printf("Processing Manifest file %s done\n", manifestfile.c_str());
}
}
// ----------------------------------------------------------------------------
void ListColumnFamiliesCommand::Help(string& ret) {
ret.append(" ");
ret.append(ListColumnFamiliesCommand::Name());
ret.append(" full_path_to_db_directory ");
ret.append("\n");
}
ListColumnFamiliesCommand::ListColumnFamiliesCommand(
const vector<string>& params, const map<string, string>& options,
const vector<string>& flags)
: LDBCommand(options, flags, false, {}) {
if (params.size() != 1) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"dbname must be specified for the list_column_families command");
} else {
dbname_ = params[0];
}
}
void ListColumnFamiliesCommand::DoCommand() {
vector<string> column_families;
Status s = DB::ListColumnFamilies(DBOptions(), dbname_, &column_families);
if (!s.ok()) {
printf("Error in processing db %s %s\n", dbname_.c_str(),
s.ToString().c_str());
} else {
printf("Column families in %s: \n{", dbname_.c_str());
bool first = true;
for (auto cf : column_families) {
if (!first) {
printf(", ");
}
first = false;
printf("%s", cf.c_str());
}
printf("}\n");
}
}
// ----------------------------------------------------------------------------
namespace {
string ReadableTime(int unixtime) {
char time_buffer [80];
time_t rawtime = unixtime;
struct tm * timeinfo = localtime(&rawtime);
strftime(time_buffer, 80, "%c", timeinfo);
return string(time_buffer);
}
// This function only called when it's the sane case of >1 buckets in time-range
// Also called only when timekv falls between ttl_start and ttl_end provided
void IncBucketCounts(vector<uint64_t>& bucket_counts, int ttl_start,
int time_range, int bucket_size, int timekv, int num_buckets) {
assert(time_range > 0 && timekv >= ttl_start && bucket_size > 0 &&
timekv < (ttl_start + time_range) && num_buckets > 1);
int bucket = (timekv - ttl_start) / bucket_size;
bucket_counts[bucket]++;
}
void PrintBucketCounts(const vector<uint64_t>& bucket_counts, int ttl_start,
int ttl_end, int bucket_size, int num_buckets) {
int time_point = ttl_start;
for(int i = 0; i < num_buckets - 1; i++, time_point += bucket_size) {
fprintf(stdout, "Keys in range %s to %s : %lu\n",
ReadableTime(time_point).c_str(),
ReadableTime(time_point + bucket_size).c_str(),
(unsigned long)bucket_counts[i]);
}
fprintf(stdout, "Keys in range %s to %s : %lu\n",
ReadableTime(time_point).c_str(),
ReadableTime(ttl_end).c_str(),
(unsigned long)bucket_counts[num_buckets - 1]);
}
} // namespace
const string InternalDumpCommand::ARG_COUNT_ONLY = "count_only";
const string InternalDumpCommand::ARG_COUNT_DELIM = "count_delim";
const string InternalDumpCommand::ARG_STATS = "stats";
const string InternalDumpCommand::ARG_INPUT_KEY_HEX = "input_key_hex";
InternalDumpCommand::InternalDumpCommand(const vector<string>& params,
const map<string, string>& options,
const vector<string>& flags) :
LDBCommand(options, flags, true,
BuildCmdLineOptions({ ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX,
ARG_FROM, ARG_TO, ARG_MAX_KEYS,
ARG_COUNT_ONLY, ARG_COUNT_DELIM, ARG_STATS,
ARG_INPUT_KEY_HEX})),
has_from_(false),
has_to_(false),
max_keys_(-1),
delim_("."),
count_only_(false),
count_delim_(false),
print_stats_(false),
is_input_key_hex_(false) {
has_from_ = ParseStringOption(options, ARG_FROM, &from_);
has_to_ = ParseStringOption(options, ARG_TO, &to_);
ParseIntOption(options, ARG_MAX_KEYS, max_keys_, exec_state_);
map<string, string>::const_iterator itr = options.find(ARG_COUNT_DELIM);
if (itr != options.end()) {
delim_ = itr->second;
count_delim_ = true;
// fprintf(stdout,"delim = %c\n",delim_[0]);
} else {
count_delim_ = IsFlagPresent(flags, ARG_COUNT_DELIM);
delim_=".";
}
print_stats_ = IsFlagPresent(flags, ARG_STATS);
count_only_ = IsFlagPresent(flags, ARG_COUNT_ONLY);
is_input_key_hex_ = IsFlagPresent(flags, ARG_INPUT_KEY_HEX);
if (is_input_key_hex_) {
if (has_from_) {
from_ = HexToString(from_);
}
if (has_to_) {
to_ = HexToString(to_);
}
}
}
void InternalDumpCommand::Help(string& ret) {
ret.append(" ");
ret.append(InternalDumpCommand::Name());
ret.append(HelpRangeCmdArgs());
ret.append(" [--" + ARG_INPUT_KEY_HEX + "]");
ret.append(" [--" + ARG_MAX_KEYS + "=<N>]");
ret.append(" [--" + ARG_COUNT_ONLY + "]");
ret.append(" [--" + ARG_COUNT_DELIM + "=<char>]");
ret.append(" [--" + ARG_STATS + "]");
ret.append("\n");
}
void InternalDumpCommand::DoCommand() {
if (!db_) {
return;
}
if (print_stats_) {
string stats;
if (db_->GetProperty("rocksdb.stats", &stats)) {
fprintf(stdout, "%s\n", stats.c_str());
}
}
// Cast as DBImpl to get internal iterator
DBImpl* idb = dynamic_cast<DBImpl*>(db_);
if (!idb) {
exec_state_ = LDBCommandExecuteResult::FAILED("DB is not DBImpl");
return;
}
string rtype1,rtype2,row,val;
rtype2 = "";
uint64_t c=0;
uint64_t s1=0,s2=0;
// Setup internal key iterator
Arena arena;
ScopedArenaIterator iter(idb->TEST_NewInternalIterator(&arena));
Status st = iter->status();
if (!st.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED("Iterator error:"
+ st.ToString());
}
if (has_from_) {
InternalKey ikey(from_, kMaxSequenceNumber, kValueTypeForSeek);
iter->Seek(ikey.Encode());
} else {
iter->SeekToFirst();
}
long long count = 0;
for (; iter->Valid(); iter->Next()) {
ParsedInternalKey ikey;
if (!ParseInternalKey(iter->key(), &ikey)) {
fprintf(stderr, "Internal Key [%s] parse error!\n",
iter->key().ToString(true /* in hex*/).data());
// TODO: add error counter
continue;
}
// If end marker was specified, we stop before it
if (has_to_ && options_.comparator->Compare(ikey.user_key, to_) >= 0) {
break;
}
++count;
int k;
if (count_delim_) {
rtype1 = "";
s1=0;
row = iter->key().ToString();
val = iter->value().ToString();
for(k=0;row[k]!='\x01' && row[k]!='\0';k++)
s1++;
for(k=0;val[k]!='\x01' && val[k]!='\0';k++)
s1++;
for(int j=0;row[j]!=delim_[0] && row[j]!='\0' && row[j]!='\x01';j++)
rtype1+=row[j];
if(rtype2.compare("") && rtype2.compare(rtype1)!=0) {
fprintf(stdout,"%s => count:%lld\tsize:%lld\n",rtype2.c_str(),
(long long)c,(long long)s2);
c=1;
s2=s1;
rtype2 = rtype1;
} else {
c++;
s2+=s1;
rtype2=rtype1;
}
}
if (!count_only_ && !count_delim_) {
string key = ikey.DebugString(is_key_hex_);
string value = iter->value().ToString(is_value_hex_);
std::cout << key << " => " << value << "\n";
}
// Terminate if maximum number of keys have been dumped
if (max_keys_ > 0 && count >= max_keys_) break;
}
if(count_delim_) {
fprintf(stdout,"%s => count:%lld\tsize:%lld\n", rtype2.c_str(),
(long long)c,(long long)s2);
} else
fprintf(stdout, "Internal keys in range: %lld\n", (long long) count);
}
const string DBDumperCommand::ARG_COUNT_ONLY = "count_only";
const string DBDumperCommand::ARG_COUNT_DELIM = "count_delim";
const string DBDumperCommand::ARG_STATS = "stats";
const string DBDumperCommand::ARG_TTL_BUCKET = "bucket";
DBDumperCommand::DBDumperCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, true,
BuildCmdLineOptions({ARG_TTL, ARG_HEX, ARG_KEY_HEX,
ARG_VALUE_HEX, ARG_FROM, ARG_TO,
ARG_MAX_KEYS, ARG_COUNT_ONLY,
ARG_COUNT_DELIM, ARG_STATS, ARG_TTL_START,
ARG_TTL_END, ARG_TTL_BUCKET,
ARG_TIMESTAMP})),
null_from_(true),
null_to_(true),
max_keys_(-1),
count_only_(false),
count_delim_(false),
print_stats_(false) {
map<string, string>::const_iterator itr = options.find(ARG_FROM);
if (itr != options.end()) {
null_from_ = false;
from_ = itr->second;
}
itr = options.find(ARG_TO);
if (itr != options.end()) {
null_to_ = false;
to_ = itr->second;
}
itr = options.find(ARG_MAX_KEYS);
if (itr != options.end()) {
try {
max_keys_ = stoi(itr->second);
} catch(const invalid_argument&) {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_MAX_KEYS +
" has an invalid value");
} catch(const out_of_range&) {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_MAX_KEYS +
" has a value out-of-range");
}
}
itr = options.find(ARG_COUNT_DELIM);
if (itr != options.end()) {
delim_ = itr->second;
count_delim_ = true;
} else {
count_delim_ = IsFlagPresent(flags, ARG_COUNT_DELIM);
delim_=".";
}
print_stats_ = IsFlagPresent(flags, ARG_STATS);
count_only_ = IsFlagPresent(flags, ARG_COUNT_ONLY);
if (is_key_hex_) {
if (!null_from_) {
from_ = HexToString(from_);
}
if (!null_to_) {
to_ = HexToString(to_);
}
}
}
void DBDumperCommand::Help(string& ret) {
ret.append(" ");
ret.append(DBDumperCommand::Name());
ret.append(HelpRangeCmdArgs());
ret.append(" [--" + ARG_TTL + "]");
ret.append(" [--" + ARG_MAX_KEYS + "=<N>]");
ret.append(" [--" + ARG_TIMESTAMP + "]");
ret.append(" [--" + ARG_COUNT_ONLY + "]");
ret.append(" [--" + ARG_COUNT_DELIM + "=<char>]");
ret.append(" [--" + ARG_STATS + "]");
ret.append(" [--" + ARG_TTL_BUCKET + "=<N>]");
ret.append(" [--" + ARG_TTL_START + "=<N>:- is inclusive]");
ret.append(" [--" + ARG_TTL_END + "=<N>:- is exclusive]");
ret.append("\n");
}
void DBDumperCommand::DoCommand() {
if (!db_) {
return;
}
// Parse command line args
uint64_t count = 0;
if (print_stats_) {
string stats;
if (db_->GetProperty("rocksdb.stats", &stats)) {
fprintf(stdout, "%s\n", stats.c_str());
}
}
// Setup key iterator
Iterator* iter = db_->NewIterator(ReadOptions());
Status st = iter->status();
if (!st.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED("Iterator error."
+ st.ToString());
}
if (!null_from_) {
iter->Seek(from_);
} else {
iter->SeekToFirst();
}
int max_keys = max_keys_;
int ttl_start;
if (!ParseIntOption(option_map_, ARG_TTL_START, ttl_start, exec_state_)) {
ttl_start = DBWithTTLImpl::kMinTimestamp; // TTL introduction time
}
int ttl_end;
if (!ParseIntOption(option_map_, ARG_TTL_END, ttl_end, exec_state_)) {
ttl_end = DBWithTTLImpl::kMaxTimestamp; // Max time allowed by TTL feature
}
if (ttl_end < ttl_start) {
fprintf(stderr, "Error: End time can't be less than start time\n");
delete iter;
return;
}
int time_range = ttl_end - ttl_start;
int bucket_size;
if (!ParseIntOption(option_map_, ARG_TTL_BUCKET, bucket_size, exec_state_) ||
bucket_size <= 0) {
bucket_size = time_range; // Will have just 1 bucket by default
}
//cretaing variables for row count of each type
string rtype1,rtype2,row,val;
rtype2 = "";
uint64_t c=0;
uint64_t s1=0,s2=0;
// At this point, bucket_size=0 => time_range=0
uint64_t num_buckets = (bucket_size >= time_range) ? 1 :
((time_range + bucket_size - 1) / bucket_size);
vector<uint64_t> bucket_counts(num_buckets, 0);
if (is_db_ttl_ && !count_only_ && timestamp_ && !count_delim_) {
fprintf(stdout, "Dumping key-values from %s to %s\n",
ReadableTime(ttl_start).c_str(), ReadableTime(ttl_end).c_str());
}
for (; iter->Valid(); iter->Next()) {
int rawtime = 0;
// If end marker was specified, we stop before it
if (!null_to_ && (iter->key().ToString() >= to_))
break;
// Terminate if maximum number of keys have been dumped
if (max_keys == 0)
break;
if (is_db_ttl_) {
TtlIterator* it_ttl = dynamic_cast<TtlIterator*>(iter);
assert(it_ttl);
rawtime = it_ttl->timestamp();
if (rawtime < ttl_start || rawtime >= ttl_end) {
continue;
}
}
if (max_keys > 0) {
--max_keys;
}
if (is_db_ttl_ && num_buckets > 1) {
IncBucketCounts(bucket_counts, ttl_start, time_range, bucket_size,
rawtime, num_buckets);
}
++count;
if (count_delim_) {
rtype1 = "";
row = iter->key().ToString();
val = iter->value().ToString();
s1 = row.size()+val.size();
for(int j=0;row[j]!=delim_[0] && row[j]!='\0';j++)
rtype1+=row[j];
if(rtype2.compare("") && rtype2.compare(rtype1)!=0) {
fprintf(stdout,"%s => count:%lld\tsize:%lld\n",rtype2.c_str(),
(long long )c,(long long)s2);
c=1;
s2=s1;
rtype2 = rtype1;
} else {
c++;
s2+=s1;
rtype2=rtype1;
}
}
if (!count_only_ && !count_delim_) {
if (is_db_ttl_ && timestamp_) {
fprintf(stdout, "%s ", ReadableTime(rawtime).c_str());
}
string str = PrintKeyValue(iter->key().ToString(),
iter->value().ToString(), is_key_hex_,
is_value_hex_);
fprintf(stdout, "%s\n", str.c_str());
}
}
if (num_buckets > 1 && is_db_ttl_) {
PrintBucketCounts(bucket_counts, ttl_start, ttl_end, bucket_size,
num_buckets);
} else if(count_delim_) {
fprintf(stdout,"%s => count:%lld\tsize:%lld\n",rtype2.c_str(),
(long long )c,(long long)s2);
} else {
fprintf(stdout, "Keys in range: %lld\n", (long long) count);
}
// Clean up
delete iter;
}
const string ReduceDBLevelsCommand::ARG_NEW_LEVELS = "new_levels";
const string ReduceDBLevelsCommand::ARG_PRINT_OLD_LEVELS = "print_old_levels";
ReduceDBLevelsCommand::ReduceDBLevelsCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_NEW_LEVELS, ARG_PRINT_OLD_LEVELS})),
old_levels_(1 << 16),
new_levels_(-1),
print_old_levels_(false) {
ParseIntOption(option_map_, ARG_NEW_LEVELS, new_levels_, exec_state_);
print_old_levels_ = IsFlagPresent(flags, ARG_PRINT_OLD_LEVELS);
if(new_levels_ <= 0) {
exec_state_ = LDBCommandExecuteResult::FAILED(
" Use --" + ARG_NEW_LEVELS + " to specify a new level number\n");
}
}
vector<string> ReduceDBLevelsCommand::PrepareArgs(const string& db_path,
int new_levels, bool print_old_level) {
vector<string> ret;
ret.push_back("reduce_levels");
ret.push_back("--" + ARG_DB + "=" + db_path);
ret.push_back("--" + ARG_NEW_LEVELS + "=" + to_string(new_levels));
if(print_old_level) {
ret.push_back("--" + ARG_PRINT_OLD_LEVELS);
}
return ret;
}
void ReduceDBLevelsCommand::Help(string& ret) {
ret.append(" ");
ret.append(ReduceDBLevelsCommand::Name());
ret.append(" --" + ARG_NEW_LEVELS + "=<New number of levels>");
ret.append(" [--" + ARG_PRINT_OLD_LEVELS + "]");
ret.append("\n");
}
Options ReduceDBLevelsCommand::PrepareOptionsForOpenDB() {
Options opt = LDBCommand::PrepareOptionsForOpenDB();
opt.num_levels = old_levels_;
opt.max_bytes_for_level_multiplier_additional.resize(opt.num_levels, 1);
// Disable size compaction
opt.max_bytes_for_level_base = 1ULL << 50;
opt.max_bytes_for_level_multiplier = 1;
opt.max_mem_compaction_level = 0;
return opt;
}
Status ReduceDBLevelsCommand::GetOldNumOfLevels(Options& opt,
int* levels) {
EnvOptions soptions;
std::shared_ptr<Cache> tc(
NewLRUCache(opt.max_open_files - 10, opt.table_cache_numshardbits,
opt.table_cache_remove_scan_count_limit));
const InternalKeyComparator cmp(opt.comparator);
WriteController wc;
VersionSet versions(db_path_, &opt, soptions, tc.get(), &wc);
std::vector<ColumnFamilyDescriptor> dummy;
ColumnFamilyDescriptor dummy_descriptor(kDefaultColumnFamilyName,
ColumnFamilyOptions(opt));
dummy.push_back(dummy_descriptor);
// We rely the VersionSet::Recover to tell us the internal data structures
// in the db. And the Recover() should never do any change
// (like LogAndApply) to the manifest file.
Status st = versions.Recover(dummy);
if (!st.ok()) {
return st;
}
int max = -1;
auto default_cfd = versions.GetColumnFamilySet()->GetDefault();
for (int i = 0; i < default_cfd->NumberLevels(); i++) {
if (default_cfd->current()->NumLevelFiles(i)) {
max = i;
}
}
*levels = max + 1;
return st;
}
void ReduceDBLevelsCommand::DoCommand() {
if (new_levels_ <= 1) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Invalid number of levels.\n");
return;
}
Status st;
Options opt = PrepareOptionsForOpenDB();
int old_level_num = -1;
st = GetOldNumOfLevels(opt, &old_level_num);
if (!st.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
return;
}
if (print_old_levels_) {
fprintf(stdout, "The old number of levels in use is %d\n", old_level_num);
}
if (old_level_num <= new_levels_) {
return;
}
old_levels_ = old_level_num;
OpenDB();
if (!db_) {
return;
}
// Compact the whole DB to put all files to the highest level.
fprintf(stdout, "Compacting the db...\n");
db_->CompactRange(nullptr, nullptr);
CloseDB();
EnvOptions soptions;
st = VersionSet::ReduceNumberOfLevels(db_path_, &opt, soptions, new_levels_);
if (!st.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
return;
}
}
const string ChangeCompactionStyleCommand::ARG_OLD_COMPACTION_STYLE =
"old_compaction_style";
const string ChangeCompactionStyleCommand::ARG_NEW_COMPACTION_STYLE =
"new_compaction_style";
ChangeCompactionStyleCommand::ChangeCompactionStyleCommand(
const vector<string>& params, const map<string, string>& options,
const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_OLD_COMPACTION_STYLE,
ARG_NEW_COMPACTION_STYLE})),
old_compaction_style_(-1),
new_compaction_style_(-1) {
ParseIntOption(option_map_, ARG_OLD_COMPACTION_STYLE, old_compaction_style_,
exec_state_);
if (old_compaction_style_ != kCompactionStyleLevel &&
old_compaction_style_ != kCompactionStyleUniversal) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Use --" + ARG_OLD_COMPACTION_STYLE + " to specify old compaction " +
"style. Check ldb help for proper compaction style value.\n");
return;
}
ParseIntOption(option_map_, ARG_NEW_COMPACTION_STYLE, new_compaction_style_,
exec_state_);
if (new_compaction_style_ != kCompactionStyleLevel &&
new_compaction_style_ != kCompactionStyleUniversal) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Use --" + ARG_NEW_COMPACTION_STYLE + " to specify new compaction " +
"style. Check ldb help for proper compaction style value.\n");
return;
}
if (new_compaction_style_ == old_compaction_style_) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Old compaction style is the same as new compaction style. "
"Nothing to do.\n");
return;
}
if (old_compaction_style_ == kCompactionStyleUniversal &&
new_compaction_style_ == kCompactionStyleLevel) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Convert from universal compaction to level compaction. "
"Nothing to do.\n");
return;
}
}
void ChangeCompactionStyleCommand::Help(string& ret) {
ret.append(" ");
ret.append(ChangeCompactionStyleCommand::Name());
ret.append(" --" + ARG_OLD_COMPACTION_STYLE + "=<Old compaction style: 0 " +
"for level compaction, 1 for universal compaction>");
ret.append(" --" + ARG_NEW_COMPACTION_STYLE + "=<New compaction style: 0 " +
"for level compaction, 1 for universal compaction>");
ret.append("\n");
}
Options ChangeCompactionStyleCommand::PrepareOptionsForOpenDB() {
Options opt = LDBCommand::PrepareOptionsForOpenDB();
if (old_compaction_style_ == kCompactionStyleLevel &&
new_compaction_style_ == kCompactionStyleUniversal) {
// In order to convert from level compaction to universal compaction, we
// need to compact all data into a single file and move it to level 0.
opt.disable_auto_compactions = true;
opt.target_file_size_base = INT_MAX;
opt.target_file_size_multiplier = 1;
opt.max_bytes_for_level_base = INT_MAX;
opt.max_bytes_for_level_multiplier = 1;
}
return opt;
}
void ChangeCompactionStyleCommand::DoCommand() {
// print db stats before we have made any change
std::string property;
std::string files_per_level;
for (int i = 0; i < db_->NumberLevels(); i++) {
db_->GetProperty("rocksdb.num-files-at-level" + NumberToString(i),
&property);
// format print string
char buf[100];
snprintf(buf, sizeof(buf), "%s%s", (i ? "," : ""), property.c_str());
files_per_level += buf;
}
fprintf(stdout, "files per level before compaction: %s\n",
files_per_level.c_str());
// manual compact into a single file and move the file to level 0
db_->CompactRange(nullptr, nullptr,
true /* reduce level */,
0 /* reduce to level 0 */);
// verify compaction result
files_per_level = "";
int num_files = 0;
for (int i = 0; i < db_->NumberLevels(); i++) {
db_->GetProperty("rocksdb.num-files-at-level" + NumberToString(i),
&property);
// format print string
char buf[100];
snprintf(buf, sizeof(buf), "%s%s", (i ? "," : ""), property.c_str());
files_per_level += buf;
num_files = atoi(property.c_str());
// level 0 should have only 1 file
if (i == 0 && num_files != 1) {
exec_state_ = LDBCommandExecuteResult::FAILED("Number of db files at "
"level 0 after compaction is " + std::to_string(num_files) +
", not 1.\n");
return;
}
// other levels should have no file
if (i > 0 && num_files != 0) {
exec_state_ = LDBCommandExecuteResult::FAILED("Number of db files at "
"level " + std::to_string(i) + " after compaction is " +
std::to_string(num_files) + ", not 0.\n");
return;
}
}
fprintf(stdout, "files per level after compaction: %s\n",
files_per_level.c_str());
}
class InMemoryHandler : public WriteBatch::Handler {
public:
InMemoryHandler(stringstream& row, bool print_values) : Handler(),row_(row) {
print_values_ = print_values;
}
void commonPutMerge(const Slice& key, const Slice& value) {
string k = LDBCommand::StringToHex(key.ToString());
if (print_values_) {
string v = LDBCommand::StringToHex(value.ToString());
row_ << k << " : ";
row_ << v << " ";
} else {
row_ << k << " ";
}
}
virtual void Put(const Slice& key, const Slice& value) {
row_ << "PUT : ";
commonPutMerge(key, value);
}
virtual void Merge(const Slice& key, const Slice& value) {
row_ << "MERGE : ";
commonPutMerge(key, value);
}
virtual void Delete(const Slice& key) {
row_ <<",DELETE : ";
row_ << LDBCommand::StringToHex(key.ToString()) << " ";
}
virtual ~InMemoryHandler() { };
private:
stringstream & row_;
bool print_values_;
};
const string WALDumperCommand::ARG_WAL_FILE = "walfile";
const string WALDumperCommand::ARG_PRINT_VALUE = "print_value";
const string WALDumperCommand::ARG_PRINT_HEADER = "header";
WALDumperCommand::WALDumperCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, true,
BuildCmdLineOptions(
{ARG_WAL_FILE, ARG_PRINT_HEADER, ARG_PRINT_VALUE})),
print_header_(false), print_values_(false) {
wal_file_.clear();
map<string, string>::const_iterator itr = options.find(ARG_WAL_FILE);
if (itr != options.end()) {
wal_file_ = itr->second;
}
print_header_ = IsFlagPresent(flags, ARG_PRINT_HEADER);
print_values_ = IsFlagPresent(flags, ARG_PRINT_VALUE);
if (wal_file_.empty()) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Argument " + ARG_WAL_FILE + " must be specified.");
}
}
void WALDumperCommand::Help(string& ret) {
ret.append(" ");
ret.append(WALDumperCommand::Name());
ret.append(" --" + ARG_WAL_FILE + "=<write_ahead_log_file_path>");
ret.append(" [--" + ARG_PRINT_HEADER + "] ");
ret.append(" [--" + ARG_PRINT_VALUE + "] ");
ret.append("\n");
}
void WALDumperCommand::DoCommand() {
struct StdErrReporter : public log::Reader::Reporter {
virtual void Corruption(size_t bytes, const Status& s) {
cerr<<"Corruption detected in log file "<<s.ToString()<<"\n";
}
};
unique_ptr<SequentialFile> file;
Env* env_ = Env::Default();
EnvOptions soptions;
Status status = env_->NewSequentialFile(wal_file_, &file, soptions);
if (!status.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED("Failed to open WAL file " +
status.ToString());
} else {
StdErrReporter reporter;
log::Reader reader(move(file), &reporter, true, 0);
string scratch;
WriteBatch batch;
Slice record;
stringstream row;
if (print_header_) {
cout<<"Sequence,Count,ByteSize,Physical Offset,Key(s)";
if (print_values_) {
cout << " : value ";
}
cout << "\n";
}
while(reader.ReadRecord(&record, &scratch)) {
row.str("");
if (record.size() < 12) {
reporter.Corruption(
record.size(), Status::Corruption("log record too small"));
} else {
WriteBatchInternal::SetContents(&batch, record);
row<<WriteBatchInternal::Sequence(&batch)<<",";
row<<WriteBatchInternal::Count(&batch)<<",";
row<<WriteBatchInternal::ByteSize(&batch)<<",";
row<<reader.LastRecordOffset()<<",";
InMemoryHandler handler(row, print_values_);
batch.Iterate(&handler);
row<<"\n";
}
cout<<row.str();
}
}
}
GetCommand::GetCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, true, BuildCmdLineOptions({ARG_TTL, ARG_HEX,
ARG_KEY_HEX,
ARG_VALUE_HEX})) {
if (params.size() != 1) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"<key> must be specified for the get command");
} else {
key_ = params.at(0);
}
if (is_key_hex_) {
key_ = HexToString(key_);
}
}
void GetCommand::Help(string& ret) {
ret.append(" ");
ret.append(GetCommand::Name());
ret.append(" <key>");
ret.append(" [--" + ARG_TTL + "]");
ret.append("\n");
}
void GetCommand::DoCommand() {
string value;
Status st = db_->Get(ReadOptions(), key_, &value);
if (st.ok()) {
fprintf(stdout, "%s\n",
(is_value_hex_ ? StringToHex(value) : value).c_str());
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
}
ApproxSizeCommand::ApproxSizeCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, true,
BuildCmdLineOptions({ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX,
ARG_FROM, ARG_TO})) {
if (options.find(ARG_FROM) != options.end()) {
start_key_ = options.find(ARG_FROM)->second;
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_FROM +
" must be specified for approxsize command");
return;
}
if (options.find(ARG_TO) != options.end()) {
end_key_ = options.find(ARG_TO)->second;
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_TO +
" must be specified for approxsize command");
return;
}
if (is_key_hex_) {
start_key_ = HexToString(start_key_);
end_key_ = HexToString(end_key_);
}
}
void ApproxSizeCommand::Help(string& ret) {
ret.append(" ");
ret.append(ApproxSizeCommand::Name());
ret.append(HelpRangeCmdArgs());
ret.append("\n");
}
void ApproxSizeCommand::DoCommand() {
Range ranges[1];
ranges[0] = Range(start_key_, end_key_);
uint64_t sizes[1];
db_->GetApproximateSizes(ranges, 1, sizes);
fprintf(stdout, "%lu\n", (unsigned long)sizes[0]);
/* Weird that GetApproximateSizes() returns void, although documentation
* says that it returns a Status object.
if (!st.ok()) {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
*/
}
BatchPutCommand::BatchPutCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_TTL, ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX,
ARG_CREATE_IF_MISSING})) {
if (params.size() < 2) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"At least one <key> <value> pair must be specified batchput.");
} else if (params.size() % 2 != 0) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"Equal number of <key>s and <value>s must be specified for batchput.");
} else {
for (size_t i = 0; i < params.size(); i += 2) {
string key = params.at(i);
string value = params.at(i+1);
key_values_.push_back(pair<string, string>(
is_key_hex_ ? HexToString(key) : key,
is_value_hex_ ? HexToString(value) : value));
}
}
}
void BatchPutCommand::Help(string& ret) {
ret.append(" ");
ret.append(BatchPutCommand::Name());
ret.append(" <key> <value> [<key> <value>] [..]");
ret.append(" [--" + ARG_TTL + "]");
ret.append("\n");
}
void BatchPutCommand::DoCommand() {
WriteBatch batch;
for (vector<pair<string, string>>::const_iterator itr
= key_values_.begin(); itr != key_values_.end(); itr++) {
batch.Put(itr->first, itr->second);
}
Status st = db_->Write(WriteOptions(), &batch);
if (st.ok()) {
fprintf(stdout, "OK\n");
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
}
Options BatchPutCommand::PrepareOptionsForOpenDB() {
Options opt = LDBCommand::PrepareOptionsForOpenDB();
opt.create_if_missing = IsFlagPresent(flags_, ARG_CREATE_IF_MISSING);
return opt;
}
ScanCommand::ScanCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, true,
BuildCmdLineOptions({ARG_TTL, ARG_HEX, ARG_KEY_HEX, ARG_TO,
ARG_VALUE_HEX, ARG_FROM, ARG_TIMESTAMP,
ARG_MAX_KEYS, ARG_TTL_START, ARG_TTL_END})),
start_key_specified_(false),
end_key_specified_(false),
max_keys_scanned_(-1) {
map<string, string>::const_iterator itr = options.find(ARG_FROM);
if (itr != options.end()) {
start_key_ = itr->second;
if (is_key_hex_) {
start_key_ = HexToString(start_key_);
}
start_key_specified_ = true;
}
itr = options.find(ARG_TO);
if (itr != options.end()) {
end_key_ = itr->second;
if (is_key_hex_) {
end_key_ = HexToString(end_key_);
}
end_key_specified_ = true;
}
itr = options.find(ARG_MAX_KEYS);
if (itr != options.end()) {
try {
max_keys_scanned_ = stoi(itr->second);
} catch(const invalid_argument&) {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_MAX_KEYS +
" has an invalid value");
} catch(const out_of_range&) {
exec_state_ = LDBCommandExecuteResult::FAILED(ARG_MAX_KEYS +
" has a value out-of-range");
}
}
}
void ScanCommand::Help(string& ret) {
ret.append(" ");
ret.append(ScanCommand::Name());
ret.append(HelpRangeCmdArgs());
ret.append(" [--" + ARG_TTL + "]");
ret.append(" [--" + ARG_TIMESTAMP + "]");
ret.append(" [--" + ARG_MAX_KEYS + "=<N>q] ");
ret.append(" [--" + ARG_TTL_START + "=<N>:- is inclusive]");
ret.append(" [--" + ARG_TTL_END + "=<N>:- is exclusive]");
ret.append("\n");
}
void ScanCommand::DoCommand() {
int num_keys_scanned = 0;
Iterator* it = db_->NewIterator(ReadOptions());
if (start_key_specified_) {
it->Seek(start_key_);
} else {
it->SeekToFirst();
}
int ttl_start;
if (!ParseIntOption(option_map_, ARG_TTL_START, ttl_start, exec_state_)) {
ttl_start = DBWithTTLImpl::kMinTimestamp; // TTL introduction time
}
int ttl_end;
if (!ParseIntOption(option_map_, ARG_TTL_END, ttl_end, exec_state_)) {
ttl_end = DBWithTTLImpl::kMaxTimestamp; // Max time allowed by TTL feature
}
if (ttl_end < ttl_start) {
fprintf(stderr, "Error: End time can't be less than start time\n");
delete it;
return;
}
if (is_db_ttl_ && timestamp_) {
fprintf(stdout, "Scanning key-values from %s to %s\n",
ReadableTime(ttl_start).c_str(), ReadableTime(ttl_end).c_str());
}
for ( ;
it->Valid() && (!end_key_specified_ || it->key().ToString() < end_key_);
it->Next()) {
string key = ldb_options_.key_formatter->Format(it->key());
if (is_db_ttl_) {
TtlIterator* it_ttl = dynamic_cast<TtlIterator*>(it);
assert(it_ttl);
int rawtime = it_ttl->timestamp();
if (rawtime < ttl_start || rawtime >= ttl_end) {
continue;
}
if (timestamp_) {
fprintf(stdout, "%s ", ReadableTime(rawtime).c_str());
}
}
string value = it->value().ToString();
fprintf(stdout, "%s : %s\n",
(is_key_hex_ ? "0x" + it->key().ToString(true) : key).c_str(),
(is_value_hex_ ? StringToHex(value) : value).c_str()
);
num_keys_scanned++;
if (max_keys_scanned_ >= 0 && num_keys_scanned >= max_keys_scanned_) {
break;
}
}
if (!it->status().ok()) { // Check for any errors found during the scan
exec_state_ = LDBCommandExecuteResult::FAILED(it->status().ToString());
}
delete it;
}
DeleteCommand::DeleteCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX})) {
if (params.size() != 1) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"KEY must be specified for the delete command");
} else {
key_ = params.at(0);
if (is_key_hex_) {
key_ = HexToString(key_);
}
}
}
void DeleteCommand::Help(string& ret) {
ret.append(" ");
ret.append(DeleteCommand::Name() + " <key>");
ret.append("\n");
}
void DeleteCommand::DoCommand() {
Status st = db_->Delete(WriteOptions(), key_);
if (st.ok()) {
fprintf(stdout, "OK\n");
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
}
PutCommand::PutCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_TTL, ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX,
ARG_CREATE_IF_MISSING})) {
if (params.size() != 2) {
exec_state_ = LDBCommandExecuteResult::FAILED(
"<key> and <value> must be specified for the put command");
} else {
key_ = params.at(0);
value_ = params.at(1);
}
if (is_key_hex_) {
key_ = HexToString(key_);
}
if (is_value_hex_) {
value_ = HexToString(value_);
}
}
void PutCommand::Help(string& ret) {
ret.append(" ");
ret.append(PutCommand::Name());
ret.append(" <key> <value> ");
ret.append(" [--" + ARG_TTL + "]");
ret.append("\n");
}
void PutCommand::DoCommand() {
Status st = db_->Put(WriteOptions(), key_, value_);
if (st.ok()) {
fprintf(stdout, "OK\n");
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
}
Options PutCommand::PrepareOptionsForOpenDB() {
Options opt = LDBCommand::PrepareOptionsForOpenDB();
opt.create_if_missing = IsFlagPresent(flags_, ARG_CREATE_IF_MISSING);
return opt;
}
const char* DBQuerierCommand::HELP_CMD = "help";
const char* DBQuerierCommand::GET_CMD = "get";
const char* DBQuerierCommand::PUT_CMD = "put";
const char* DBQuerierCommand::DELETE_CMD = "delete";
DBQuerierCommand::DBQuerierCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({ARG_TTL, ARG_HEX, ARG_KEY_HEX,
ARG_VALUE_HEX})) {
}
void DBQuerierCommand::Help(string& ret) {
ret.append(" ");
ret.append(DBQuerierCommand::Name());
ret.append(" [--" + ARG_TTL + "]");
ret.append("\n");
ret.append(" Starts a REPL shell. Type help for list of available "
"commands.");
ret.append("\n");
}
void DBQuerierCommand::DoCommand() {
if (!db_) {
return;
}
ReadOptions read_options;
WriteOptions write_options;
string line;
string key;
string value;
while (getline(cin, line, '\n')) {
// Parse line into vector<string>
vector<string> tokens;
size_t pos = 0;
while (true) {
size_t pos2 = line.find(' ', pos);
if (pos2 == string::npos) {
break;
}
tokens.push_back(line.substr(pos, pos2-pos));
pos = pos2 + 1;
}
tokens.push_back(line.substr(pos));
const string& cmd = tokens[0];
if (cmd == HELP_CMD) {
fprintf(stdout,
"get <key>\n"
"put <key> <value>\n"
"delete <key>\n");
} else if (cmd == DELETE_CMD && tokens.size() == 2) {
key = (is_key_hex_ ? HexToString(tokens[1]) : tokens[1]);
db_->Delete(write_options, Slice(key));
fprintf(stdout, "Successfully deleted %s\n", tokens[1].c_str());
} else if (cmd == PUT_CMD && tokens.size() == 3) {
key = (is_key_hex_ ? HexToString(tokens[1]) : tokens[1]);
value = (is_value_hex_ ? HexToString(tokens[2]) : tokens[2]);
db_->Put(write_options, Slice(key), Slice(value));
fprintf(stdout, "Successfully put %s %s\n",
tokens[1].c_str(), tokens[2].c_str());
} else if (cmd == GET_CMD && tokens.size() == 2) {
key = (is_key_hex_ ? HexToString(tokens[1]) : tokens[1]);
if (db_->Get(read_options, Slice(key), &value).ok()) {
fprintf(stdout, "%s\n", PrintKeyValue(key, value,
is_key_hex_, is_value_hex_).c_str());
} else {
fprintf(stdout, "Not found %s\n", tokens[1].c_str());
}
} else {
fprintf(stdout, "Unknown command %s\n", line.c_str());
}
}
}
CheckConsistencyCommand::CheckConsistencyCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags) :
LDBCommand(options, flags, false,
BuildCmdLineOptions({})) {
}
void CheckConsistencyCommand::Help(string& ret) {
ret.append(" ");
ret.append(CheckConsistencyCommand::Name());
ret.append("\n");
}
void CheckConsistencyCommand::DoCommand() {
Options opt = PrepareOptionsForOpenDB();
opt.paranoid_checks = true;
if (!exec_state_.IsNotStarted()) {
return;
}
DB* db;
Status st = DB::OpenForReadOnly(opt, db_path_, &db, false);
delete db;
if (st.ok()) {
fprintf(stdout, "OK\n");
} else {
exec_state_ = LDBCommandExecuteResult::FAILED(st.ToString());
}
}
} // namespace rocksdb
#endif // ROCKSDB_LITE
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