mirror of https://github.com/facebook/rocksdb.git
119 lines
4.1 KiB
C++
119 lines
4.1 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#include "table/table_properties_internal.h"
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#include "rocksdb/table_properties.h"
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#include "rocksdb/iterator.h"
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#include "rocksdb/env.h"
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#include "port/port.h"
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#include "util/string_util.h"
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namespace rocksdb {
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namespace {
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void AppendProperty(
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std::string& props,
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const std::string& key,
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const std::string& value,
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const std::string& prop_delim,
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const std::string& kv_delim) {
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props.append(key);
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props.append(kv_delim);
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props.append(value);
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props.append(prop_delim);
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}
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template <class TValue>
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void AppendProperty(
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std::string& props,
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const std::string& key,
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const TValue& value,
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const std::string& prop_delim,
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const std::string& kv_delim) {
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AppendProperty(
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props, key, ToString(value), prop_delim, kv_delim
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);
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}
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}
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std::string TableProperties::ToString(
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const std::string& prop_delim,
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const std::string& kv_delim) const {
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std::string result;
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result.reserve(1024);
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// Basic Info
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AppendProperty(result, "# data blocks", num_data_blocks, prop_delim,
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kv_delim);
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AppendProperty(result, "# entries", num_entries, prop_delim, kv_delim);
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AppendProperty(result, "raw key size", raw_key_size, prop_delim, kv_delim);
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AppendProperty(result, "raw average key size",
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num_entries != 0 ? 1.0 * raw_key_size / num_entries : 0.0,
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prop_delim, kv_delim);
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AppendProperty(result, "raw value size", raw_value_size, prop_delim,
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kv_delim);
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AppendProperty(result, "raw average value size",
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num_entries != 0 ? 1.0 * raw_value_size / num_entries : 0.0,
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prop_delim, kv_delim);
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AppendProperty(result, "data block size", data_size, prop_delim, kv_delim);
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AppendProperty(result, "index block size", index_size, prop_delim, kv_delim);
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AppendProperty(result, "filter block size", filter_size, prop_delim,
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kv_delim);
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AppendProperty(result, "(estimated) table size",
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data_size + index_size + filter_size, prop_delim, kv_delim);
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AppendProperty(
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result, "filter policy name",
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filter_policy_name.empty() ? std::string("N/A") : filter_policy_name,
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prop_delim, kv_delim);
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return result;
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}
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const std::string TablePropertiesNames::kDataSize =
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"rocksdb.data.size";
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const std::string TablePropertiesNames::kIndexSize =
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"rocksdb.index.size";
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const std::string TablePropertiesNames::kFilterSize =
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"rocksdb.filter.size";
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const std::string TablePropertiesNames::kRawKeySize =
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"rocksdb.raw.key.size";
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const std::string TablePropertiesNames::kRawValueSize =
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"rocksdb.raw.value.size";
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const std::string TablePropertiesNames::kNumDataBlocks =
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"rocksdb.num.data.blocks";
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const std::string TablePropertiesNames::kNumEntries =
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"rocksdb.num.entries";
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const std::string TablePropertiesNames::kFilterPolicy =
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"rocksdb.filter.policy";
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const std::string TablePropertiesNames::kFormatVersion =
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"rocksdb.format.version";
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const std::string TablePropertiesNames::kFixedKeyLen =
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"rocksdb.fixed.key.length";
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extern const std::string kPropertiesBlock = "rocksdb.properties";
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// Old property block name for backward compatibility
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extern const std::string kPropertiesBlockOldName = "rocksdb.stats";
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// Seek to the properties block.
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// Return true if it successfully seeks to the properties block.
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Status SeekToPropertiesBlock(Iterator* meta_iter, bool* is_found) {
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*is_found = true;
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meta_iter->Seek(kPropertiesBlock);
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if (meta_iter->status().ok() &&
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(!meta_iter->Valid() || meta_iter->key() != kPropertiesBlock)) {
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meta_iter->Seek(kPropertiesBlockOldName);
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if (meta_iter->status().ok() &&
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(!meta_iter->Valid() || meta_iter->key() != kPropertiesBlockOldName)) {
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*is_found = false;
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}
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}
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return meta_iter->status();
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}
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} // namespace rocksdb
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