rocksdb/db/compaction/sst_partitioner.cc

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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).
//
#include "rocksdb/sst_partitioner.h"
#include <algorithm>
namespace ROCKSDB_NAMESPACE {
PartitionerResult SstPartitionerFixedPrefix::ShouldPartition(
const PartitionerRequest& request) {
Slice last_key_fixed(*request.prev_user_key);
if (last_key_fixed.size() > len_) {
last_key_fixed.size_ = len_;
}
Slice current_key_fixed(*request.current_user_key);
if (current_key_fixed.size() > len_) {
current_key_fixed.size_ = len_;
}
return last_key_fixed.compare(current_key_fixed) != 0 ? kRequired
: kNotRequired;
}
bool SstPartitionerFixedPrefix::CanDoTrivialMove(
const Slice& smallest_user_key, const Slice& largest_user_key) {
return ShouldPartition(PartitionerRequest(smallest_user_key, largest_user_key,
0)) == kNotRequired;
}
std::unique_ptr<SstPartitioner>
SstPartitionerFixedPrefixFactory::CreatePartitioner(
const SstPartitioner::Context& /* context */) const {
return std::unique_ptr<SstPartitioner>(new SstPartitionerFixedPrefix(len_));
}
std::shared_ptr<SstPartitionerFactory> NewSstPartitionerFixedPrefixFactory(
size_t prefix_len) {
return std::make_shared<SstPartitionerFixedPrefixFactory>(prefix_len);
}
} // namespace ROCKSDB_NAMESPACE