rocksdb/db/table_properties_collector.cc

165 lines
4.2 KiB
C++

// 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.
#include "db/table_properties_collector.h"
#include "db/dbformat.h"
#include "util/coding.h"
namespace rocksdb {
namespace {
void AppendProperty(
std::string& props,
const std::string& key,
const std::string& value,
const std::string& prop_delim,
const std::string& kv_delim) {
props.append(key);
props.append(kv_delim);
props.append(value);
props.append(prop_delim);
}
template <class TValue>
void AppendProperty(
std::string& props,
const std::string& key,
const TValue& value,
const std::string& prop_delim,
const std::string& kv_delim) {
AppendProperty(
props, key, std::to_string(value), prop_delim, kv_delim
);
}
}
std::string TableProperties::ToString(
const std::string& prop_delim,
const std::string& kv_delim) const {
std::string result;
result.reserve(1024);
// Basic Info
AppendProperty(
result, "# data blocks", num_data_blocks, prop_delim, kv_delim
);
AppendProperty(result, "# entries", num_entries, prop_delim, kv_delim);
AppendProperty(result, "raw key size", raw_key_size, prop_delim, kv_delim);
AppendProperty(
result,
"raw average key size",
num_entries != 0 ? 1.0 * raw_key_size / num_entries : 0.0,
prop_delim,
kv_delim
);
AppendProperty(
result, "raw value size", raw_value_size, prop_delim, kv_delim
);
AppendProperty(
result,
"raw average value size",
num_entries != 0 ? 1.0 * raw_value_size / num_entries : 0.0,
prop_delim,
kv_delim
);
AppendProperty(result, "data block size", data_size, prop_delim, kv_delim);
AppendProperty(result, "index block size", index_size, prop_delim, kv_delim);
AppendProperty(
result, "filter block size", filter_size, prop_delim, kv_delim
);
AppendProperty(
result,
"(estimated) table size",
data_size + index_size + filter_size,
prop_delim,
kv_delim
);
AppendProperty(
result,
"filter policy name",
filter_policy_name.empty() ? std::string("N/A") : filter_policy_name,
prop_delim,
kv_delim
);
return result;
}
Status InternalKeyPropertiesCollector::Add(
const Slice& key, const Slice& value) {
ParsedInternalKey ikey;
if (!ParseInternalKey(key, &ikey)) {
return Status::InvalidArgument("Invalid internal key");
}
if (ikey.type == ValueType::kTypeDeletion) {
++deleted_keys_;
}
return Status::OK();
}
Status InternalKeyPropertiesCollector::Finish(
TableProperties::UserCollectedProperties* properties) {
assert(properties);
assert(properties->find(
InternalKeyTablePropertiesNames::kDeletedKeys) == properties->end());
std::string val;
PutVarint64(&val, deleted_keys_);
properties->insert({ InternalKeyTablePropertiesNames::kDeletedKeys, val });
return Status::OK();
}
TableProperties::UserCollectedProperties
InternalKeyPropertiesCollector::GetReadableProperties() const {
return {
{ "kDeletedKeys", std::to_string(deleted_keys_) }
};
}
Status UserKeyTablePropertiesCollector::Add(
const Slice& key, const Slice& value) {
ParsedInternalKey ikey;
if (!ParseInternalKey(key, &ikey)) {
return Status::InvalidArgument("Invalid internal key");
}
return collector_->Add(ikey.user_key, value);
}
Status UserKeyTablePropertiesCollector::Finish(
TableProperties::UserCollectedProperties* properties) {
return collector_->Finish(properties);
}
TableProperties::UserCollectedProperties
UserKeyTablePropertiesCollector::GetReadableProperties() const {
return collector_->GetReadableProperties();
}
const std::string InternalKeyTablePropertiesNames::kDeletedKeys
= "rocksdb.deleted.keys";
uint64_t GetDeletedKeys(
const TableProperties::UserCollectedProperties& props) {
auto pos = props.find(InternalKeyTablePropertiesNames::kDeletedKeys);
if (pos == props.end()) {
return 0;
}
Slice raw = pos->second;
uint64_t val = 0;
return GetVarint64(&raw, &val) ? val : 0;
}
} // namespace rocksdb