[RocksDB] Add bulk_load option to Options and ldb

Summary:
Add a shortcut function to make it easier for people
to efficiently bulk_load data into RocksDB.

Test Plan:
Tried ldb with "--bulk_load" and "--bulk_load --compact" and verified the outcome.
Needs to consult the team on how to test this automatically.

Reviewers: sheki, dhruba, emayanke, heyongqiang

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D8907
main
Zheng Shao 12 years ago
parent f5896681b4
commit 7b43500794
  1. 9
      include/leveldb/options.h
  2. 18
      util/ldb_cmd.cc
  3. 4
      util/ldb_cmd.h
  4. 14
      util/options.cc

@ -345,6 +345,15 @@ struct Options {
void Dump(Logger* log) const;
// Set appropriate parameters for bulk loading.
// The reason that this is a function that returns "this" instead of a
// constructure is to enable chaining of multiple similar calls in the future.
//
// All data will be in level 0 without any automatic compaction.
// It's recommended to manually call CompactRange(NULL, NULL) before reading
// from the database, because otherwise the read can be very slow.
Options* PrepareForBulkLoad();
// This method allows an application to modify/delete a key-value at
// the time of compaction. The compaction process invokes this
// method for every kv that is being compacted. A return value

@ -324,17 +324,23 @@ void CompactorCommand::DoCommand() {
}
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})),
create_if_missing_(false) {
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) {
@ -342,12 +348,17 @@ void DBLoaderCommand::Help(string& ret) {
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");
}
leveldb::Options DBLoaderCommand::PrepareOptionsForOpenDB() {
leveldb::Options opt = LDBCommand::PrepareOptionsForOpenDB();
opt.create_if_missing = create_if_missing_;
if (bulk_load_) {
opt.PrepareForBulkLoad();
}
return opt;
}
@ -380,6 +391,9 @@ void DBLoaderCommand::DoCommand() {
if (bad_lines > 0) {
std::cout << "Warning: " << bad_lines << " bad lines ignored." << std::endl;
}
if (compact_) {
db_->CompactRange(NULL, NULL);
}
}
const string DBDumperCommand::ARG_COUNT_ONLY = "count_only";

@ -372,8 +372,12 @@ public:
private:
bool create_if_missing_;
bool disable_wal_;
bool bulk_load_;
bool compact_;
static const string ARG_DISABLE_WAL;
static const string ARG_BULK_LOAD;
static const string ARG_COMPACT;
};
class ReduceDBLevelsCommand : public LDBCommand {

@ -161,4 +161,18 @@ Options::Dump(Logger* log) const
manifest_preallocation_size);
} // Options::Dump
Options*
Options::PrepareForBulkLoad()
{
level0_file_num_compaction_trigger = (1<<30);
level0_slowdown_writes_trigger = (1<<30);
level0_stop_writes_trigger = (1<<30);
disable_auto_compactions = true;
disable_seek_compaction = true;
disableDataSync = true;
source_compaction_factor = (1<<30);
return this;
}
} // namespace leveldb

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