d169b67680
Summary: In PlainTable, use one single byte to represent 8 bytes of internal bytes, if seqID = 0 and it is value type (which should be common for bottom most files). It is to save 7 bytes for uncompressed cases. Test Plan: make all check Reviewers: haobo, dhruba, kailiu Reviewed By: haobo CC: igor, leveldb Differential Revision: https://reviews.facebook.net/D15489
300 lines
8.7 KiB
C++
300 lines
8.7 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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//
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#include <map>
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#include <string>
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#include <vector>
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#include "db/dbformat.h"
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#include "db/memtable.h"
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#include "db/write_batch_internal.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/iterator.h"
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#include "rocksdb/table.h"
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#include "rocksdb/table_properties.h"
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#include "table/block.h"
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#include "table/block_builder.h"
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#include "table/format.h"
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#include "util/ldb_cmd.h"
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#include "util/random.h"
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#include "util/testharness.h"
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#include "util/testutil.h"
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namespace rocksdb {
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class SstFileReader {
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public:
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explicit SstFileReader(const std::string& file_name,
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bool verify_checksum,
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bool output_hex);
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Status ReadSequential(bool print_kv,
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uint64_t read_num,
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bool has_from,
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const std::string& from_key,
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bool has_to,
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const std::string& to_key);
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Status ReadTableProperties(TableProperties* table_properties);
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uint64_t GetReadNumber() { return read_num_; }
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private:
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Status NewTableReader(const std::string& file_path);
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std::string file_name_;
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uint64_t read_num_;
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bool verify_checksum_;
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bool output_hex_;
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EnvOptions soptions_;
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Status init_result_;
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unique_ptr<TableReader> table_reader_;
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unique_ptr<RandomAccessFile> file_;
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// table_options_ and internal_comparator_ will also be used in
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// ReadSequential internally (specifically, seek-related operations)
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Options table_options_;
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InternalKeyComparator internal_comparator_;
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};
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SstFileReader::SstFileReader(const std::string& file_path,
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bool verify_checksum,
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bool output_hex)
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:file_name_(file_path), read_num_(0), verify_checksum_(verify_checksum),
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output_hex_(output_hex), internal_comparator_(BytewiseComparator()) {
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fprintf(stdout, "Process %s\n", file_path.c_str());
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init_result_ = NewTableReader(file_name_);
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}
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Status SstFileReader::NewTableReader(const std::string& file_path) {
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Status s = table_options_.env->NewRandomAccessFile(file_path, &file_,
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soptions_);
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if (!s.ok()) {
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return s;
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}
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uint64_t file_size;
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table_options_.env->GetFileSize(file_path, &file_size);
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unique_ptr<TableFactory> table_factory;
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s = table_options_.table_factory->NewTableReader(
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table_options_, soptions_, internal_comparator_, std::move(file_),
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file_size, &table_reader_);
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return s;
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}
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Status SstFileReader::ReadSequential(bool print_kv,
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uint64_t read_num,
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bool has_from,
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const std::string& from_key,
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bool has_to,
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const std::string& to_key) {
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if (!table_reader_) {
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return init_result_;
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}
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Iterator* iter = table_reader_->NewIterator(ReadOptions(verify_checksum_,
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false));
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uint64_t i = 0;
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if (has_from) {
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InternalKey ikey(from_key, kMaxSequenceNumber, kValueTypeForSeek);
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iter->Seek(ikey.Encode());
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} else {
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iter->SeekToFirst();
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}
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for (; iter->Valid(); iter->Next()) {
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Slice key = iter->key();
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Slice value = iter->value();
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++i;
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if (read_num > 0 && i > read_num)
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break;
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ParsedInternalKey ikey;
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if (!ParseInternalKey(key, &ikey)) {
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std::cerr << "Internal Key ["
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<< key.ToString(true /* in hex*/)
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<< "] parse error!\n";
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continue;
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}
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// If end marker was specified, we stop before it
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if (has_to && BytewiseComparator()->Compare(ikey.user_key, to_key) >= 0) {
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break;
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}
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if (print_kv) {
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fprintf(stdout, "%s => %s\n",
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ikey.DebugString(output_hex_).c_str(),
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value.ToString(output_hex_).c_str());
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}
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}
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read_num_ += i;
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Status ret = iter->status();
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delete iter;
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return ret;
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}
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Status SstFileReader::ReadTableProperties(TableProperties* table_properties) {
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if (!table_reader_) {
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return init_result_;
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}
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*table_properties = table_reader_->GetTableProperties();
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return init_result_;
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}
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} // namespace rocksdb
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static void print_help() {
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fprintf(stderr,
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"sst_dump [--command=check|scan] [--verify_checksum] "
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"--file=data_dir_OR_sst_file"
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" [--output_hex]"
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" [--input_key_hex]"
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" [--from=<user_key>]"
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" [--to=<user_key>]"
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" [--read_num=NUM]"
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" [--show_properties]\n");
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}
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string HexToString(const string& str) {
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string parsed;
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if (str[0] != '0' || str[1] != 'x') {
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fprintf(stderr, "Invalid hex input %s. Must start with 0x\n",
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str.c_str());
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throw "Invalid hex input";
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}
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for (unsigned int i = 2; i < str.length();) {
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int c;
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sscanf(str.c_str() + i, "%2X", &c);
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parsed.push_back(c);
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i += 2;
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}
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return parsed;
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}
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int main(int argc, char** argv) {
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const char* dir_or_file = nullptr;
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uint64_t read_num = -1;
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std::string command;
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char junk;
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uint64_t n;
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bool verify_checksum = false;
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bool output_hex = false;
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bool input_key_hex = false;
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bool has_from = false;
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bool has_to = false;
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bool show_properties = false;
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std::string from_key;
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std::string to_key;
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for (int i = 1; i < argc; i++) {
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if (strncmp(argv[i], "--file=", 7) == 0) {
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dir_or_file = argv[i] + 7;
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} else if (strcmp(argv[i], "--output_hex") == 0) {
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output_hex = true;
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} else if (strcmp(argv[i], "--input_key_hex") == 0) {
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input_key_hex = true;
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} else if (sscanf(argv[i],
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"--read_num=%lu%c",
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(unsigned long*)&n, &junk) == 1) {
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read_num = n;
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} else if (strcmp(argv[i], "--verify_checksum") == 0) {
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verify_checksum = true;
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} else if (strncmp(argv[i], "--command=", 10) == 0) {
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command = argv[i] + 10;
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} else if (strncmp(argv[i], "--from=", 7) == 0) {
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from_key = argv[i] + 7;
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has_from = true;
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} else if (strncmp(argv[i], "--to=", 5) == 0) {
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to_key = argv[i] + 5;
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has_to = true;
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} else if (strcmp(argv[i], "--show_properties") == 0) {
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show_properties = true;
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} else {
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print_help();
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exit(1);
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}
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}
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if (input_key_hex) {
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if (has_from) {
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from_key = HexToString(from_key);
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}
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if (has_to) {
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to_key = HexToString(to_key);
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}
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}
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if (dir_or_file == nullptr) {
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print_help();
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exit(1);
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}
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std::vector<std::string> filenames;
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rocksdb::Env* env = rocksdb::Env::Default();
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rocksdb::Status st = env->GetChildren(dir_or_file, &filenames);
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bool dir = true;
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if (!st.ok()) {
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filenames.clear();
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filenames.push_back(dir_or_file);
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dir = false;
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}
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fprintf(stdout, "from [%s] to [%s]\n",
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rocksdb::Slice(from_key).ToString(true).c_str(),
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rocksdb::Slice(to_key).ToString(true).c_str());
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uint64_t total_read = 0;
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for (size_t i = 0; i < filenames.size(); i++) {
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std::string filename = filenames.at(i);
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if (filename.length() <= 4 ||
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filename.rfind(".sst") != filename.length() - 4) {
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// ignore
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continue;
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}
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if (dir) {
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filename = std::string(dir_or_file) + "/" + filename;
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}
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rocksdb::SstFileReader reader(filename, verify_checksum,
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output_hex);
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rocksdb::Status st;
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// scan all files in give file path.
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if (command == "" || command == "scan" || command == "check") {
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st = reader.ReadSequential(command != "check",
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read_num > 0 ? (read_num - total_read) :
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read_num,
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has_from, from_key, has_to, to_key);
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if (!st.ok()) {
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fprintf(stderr, "%s: %s\n", filename.c_str(),
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st.ToString().c_str());
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}
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total_read += reader.GetReadNumber();
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if (read_num > 0 && total_read > read_num) {
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break;
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}
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}
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if (show_properties) {
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rocksdb::TableProperties table_properties;
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st = reader.ReadTableProperties(&table_properties);
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if (!st.ok()) {
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fprintf(stderr, "%s: %s\n", filename.c_str(), st.ToString().c_str());
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} else {
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fprintf(stdout,
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"Table Properties:\n"
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"------------------------------\n"
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" %s", table_properties.ToString("\n ", ": ").c_str());
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fprintf(stdout, "# deleted keys: %zd\n",
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rocksdb::GetDeletedKeys(
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table_properties.user_collected_properties));
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}
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}
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}
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}
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