Update dump_tool and undump_tool to accept Options

Summary: Refactor dump_tool and undump_tool so that it's possible to use them with customized options for example setting a specific comparator similar to what Dragon is doing with the LdbTool https://phabricator.fb.com/diffusion/FBCODE/browse/master/dragon/tools/Ldb.cpp Test Plan: compiles used it to dump / undump a dragon shard Reviewers: sdong, yhchiang, igor Reviewed By: igor Subscribers: dhruba, adsharma Differential Revision: https://reviews.facebook.net/D47853
9 years ago · 9babaeed16
parent eb5b637fb0
commit 9babaeed16
6 changed files with 395 additions and 253 deletions
--- a/include/rocksdb/db_dump_tool.h
+++ b/include/rocksdb/db_dump_tool.h
@ -0,0 +1,45 @@
+//  Copyright (c) 2015, 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.
+
+#pragma once
+#ifndef ROCKSDB_LITE
+
+#include <string>
+
+#include "rocksdb/db.h"
+
+namespace rocksdb {
+
+struct DumpOptions {
+  // Database that will be dumped
+  std::string db_path;
+  // File location that will contain dump output
+  std::string dump_location;
+  // Dont include db information header in the dump
+  bool anonymous = false;
+};
+
+class DbDumpTool {
+ public:
+  bool Run(const DumpOptions& dump_options,
+           rocksdb::Options options = rocksdb::Options());
+};
+
+struct UndumpOptions {
+  // Database that we will load the dumped file into
+  std::string db_path;
+  // File location of the dumped file that will be loaded
+  std::string dump_location;
+  // Compact the db after loading the dumped file
+  bool compact_db = false;
+};
+
+class DbUndumpTool {
+ public:
+  bool Run(const UndumpOptions& undump_options,
+           rocksdb::Options options = rocksdb::Options());
+};
+}  // namespace rocksdb
+#endif  // ROCKSDB_LITE
--- a/src.mk
+++ b/src.mk
@ -76,6 +76,7 @@ LIB_SOURCES =                                                   \
  table/plain_table_reader.cc                                   \
  table/table_properties.cc                                     \
  table/two_level_iterator.cc                                   \
+  tools/dump/db_dump_tool.cc                                    \
  util/arena.cc                                                 \
  util/auto_roll_logger.cc                                      \
  util/bloom.cc                                                 \
--- a/tools/dump/db_dump_tool.cc
+++ b/tools/dump/db_dump_tool.cc
@ -0,0 +1,261 @@
+//  Copyright (c) 2014, 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.
+
+#ifndef ROCKSDB_LITE
+
+#ifndef __STDC_FORMAT_MACROS
+#define __STDC_FORMAT_MACROS
+#endif
+
+#include <inttypes.h>
+#include <iostream>
+
+#include "rocksdb/db.h"
+#include "rocksdb/db_dump_tool.h"
+#include "rocksdb/env.h"
+#include "util/coding.h"
+
+namespace rocksdb {
+
+bool DbDumpTool::Run(const DumpOptions& dump_options,
+                     rocksdb::Options options) {
+  rocksdb::DB* dbptr;
+  rocksdb::Status status;
+  std::unique_ptr<rocksdb::WritableFile> dumpfile;
+  char hostname[1024];
+  int64_t timesec;
+  std::string abspath;
+  char json[4096];
+
+  static const char* magicstr = "ROCKDUMP";
+  static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
+
+  rocksdb::Env* env = rocksdb::Env::Default();
+
+  // Open the database
+  options.create_if_missing = false;
+  status = rocksdb::DB::OpenForReadOnly(options, dump_options.db_path, &dbptr);
+  if (!status.ok()) {
+    std::cerr << "Unable to open database '" << dump_options.db_path
+              << "' for reading: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  const std::unique_ptr<rocksdb::DB> db(dbptr);
+
+  status = env->NewWritableFile(dump_options.dump_location, &dumpfile,
+                                rocksdb::EnvOptions());
+  if (!status.ok()) {
+    std::cerr << "Unable to open dump file '" << dump_options.dump_location
+              << "' for writing: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  rocksdb::Slice magicslice(magicstr, 8);
+  status = dumpfile->Append(magicslice);
+  if (!status.ok()) {
+    std::cerr << "Append failed: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  rocksdb::Slice versionslice(versionstr, 8);
+  status = dumpfile->Append(versionslice);
+  if (!status.ok()) {
+    std::cerr << "Append failed: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  if (dump_options.anonymous) {
+    snprintf(json, sizeof(json), "{}");
+  } else {
+    status = env->GetHostName(hostname, sizeof(hostname));
+    status = env->GetCurrentTime(&timesec);
+    status = env->GetAbsolutePath(dump_options.db_path, &abspath);
+    snprintf(json, sizeof(json),
+             "{ \"database-path\": \"%s\", \"hostname\": \"%s\", "
+             "\"creation-time\": %" PRIi64 " }",
+             abspath.c_str(), hostname, timesec);
+  }
+
+  rocksdb::Slice infoslice(json, strlen(json));
+  char infosize[4];
+  rocksdb::EncodeFixed32(infosize, (uint32_t)infoslice.size());
+  rocksdb::Slice infosizeslice(infosize, 4);
+  status = dumpfile->Append(infosizeslice);
+  if (!status.ok()) {
+    std::cerr << "Append failed: " << status.ToString() << std::endl;
+    return false;
+  }
+  status = dumpfile->Append(infoslice);
+  if (!status.ok()) {
+    std::cerr << "Append failed: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  const std::unique_ptr<rocksdb::Iterator> it(
+      db->NewIterator(rocksdb::ReadOptions()));
+  for (it->SeekToFirst(); it->Valid(); it->Next()) {
+    char keysize[4];
+    rocksdb::EncodeFixed32(keysize, (uint32_t)it->key().size());
+    rocksdb::Slice keysizeslice(keysize, 4);
+    status = dumpfile->Append(keysizeslice);
+    if (!status.ok()) {
+      std::cerr << "Append failed: " << status.ToString() << std::endl;
+      return false;
+    }
+    status = dumpfile->Append(it->key());
+    if (!status.ok()) {
+      std::cerr << "Append failed: " << status.ToString() << std::endl;
+      return false;
+    }
+
+    char valsize[4];
+    rocksdb::EncodeFixed32(valsize, (uint32_t)it->value().size());
+    rocksdb::Slice valsizeslice(valsize, 4);
+    status = dumpfile->Append(valsizeslice);
+    if (!status.ok()) {
+      std::cerr << "Append failed: " << status.ToString() << std::endl;
+      return false;
+    }
+    status = dumpfile->Append(it->value());
+    if (!status.ok()) {
+      std::cerr << "Append failed: " << status.ToString() << std::endl;
+      return false;
+    }
+  }
+  if (!it->status().ok()) {
+    std::cerr << "Database iteration failed: " << status.ToString()
+              << std::endl;
+    return false;
+  }
+  return true;
+}
+
+bool DbUndumpTool::Run(const UndumpOptions& undump_options,
+                       rocksdb::Options options) {
+  rocksdb::DB* dbptr;
+  rocksdb::Status status;
+  rocksdb::Env* env;
+  std::unique_ptr<rocksdb::SequentialFile> dumpfile;
+  rocksdb::Slice slice;
+  char scratch8[8];
+
+  static const char* magicstr = "ROCKDUMP";
+  static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
+
+  env = rocksdb::Env::Default();
+
+  status = env->NewSequentialFile(undump_options.dump_location, &dumpfile,
+                                  rocksdb::EnvOptions());
+  if (!status.ok()) {
+    std::cerr << "Unable to open dump file '" << undump_options.dump_location
+              << "' for reading: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  status = dumpfile->Read(8, &slice, scratch8);
+  if (!status.ok() || slice.size() != 8 ||
+      memcmp(slice.data(), magicstr, 8) != 0) {
+    std::cerr << "File '" << undump_options.dump_location
+              << "' is not a recognizable dump file." << std::endl;
+    return false;
+  }
+
+  status = dumpfile->Read(8, &slice, scratch8);
+  if (!status.ok() || slice.size() != 8 ||
+      memcmp(slice.data(), versionstr, 8) != 0) {
+    std::cerr << "File '" << undump_options.dump_location
+              << "' version not recognized." << std::endl;
+    return false;
+  }
+
+  status = dumpfile->Read(4, &slice, scratch8);
+  if (!status.ok() || slice.size() != 4) {
+    std::cerr << "Unable to read info blob size." << std::endl;
+    return false;
+  }
+  uint32_t infosize = rocksdb::DecodeFixed32(slice.data());
+  status = dumpfile->Skip(infosize);
+  if (!status.ok()) {
+    std::cerr << "Unable to skip info blob: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  options.create_if_missing = true;
+  status = rocksdb::DB::Open(options, undump_options.db_path, &dbptr);
+  if (!status.ok()) {
+    std::cerr << "Unable to open database '" << undump_options.db_path
+              << "' for writing: " << status.ToString() << std::endl;
+    return false;
+  }
+
+  const std::unique_ptr<rocksdb::DB> db(dbptr);
+
+  uint32_t last_keysize = 64;
+  size_t last_valsize = 1 << 20;
+  std::unique_ptr<char[]> keyscratch(new char[last_keysize]);
+  std::unique_ptr<char[]> valscratch(new char[last_valsize]);
+
+  while (1) {
+    uint32_t keysize, valsize;
+    rocksdb::Slice keyslice;
+    rocksdb::Slice valslice;
+
+    status = dumpfile->Read(4, &slice, scratch8);
+    if (!status.ok() || slice.size() != 4) break;
+    keysize = rocksdb::DecodeFixed32(slice.data());
+    if (keysize > last_keysize) {
+      while (keysize > last_keysize) last_keysize *= 2;
+      keyscratch = std::unique_ptr<char[]>(new char[last_keysize]);
+    }
+
+    status = dumpfile->Read(keysize, &keyslice, keyscratch.get());
+    if (!status.ok() || keyslice.size() != keysize) {
+      std::cerr << "Key read failure: "
+                << (status.ok() ? "insufficient data" : status.ToString())
+                << std::endl;
+      return false;
+    }
+
+    status = dumpfile->Read(4, &slice, scratch8);
+    if (!status.ok() || slice.size() != 4) {
+      std::cerr << "Unable to read value size: "
+                << (status.ok() ? "insufficient data" : status.ToString())
+                << std::endl;
+      return false;
+    }
+    valsize = rocksdb::DecodeFixed32(slice.data());
+    if (valsize > last_valsize) {
+      while (valsize > last_valsize) last_valsize *= 2;
+      valscratch = std::unique_ptr<char[]>(new char[last_valsize]);
+    }
+
+    status = dumpfile->Read(valsize, &valslice, valscratch.get());
+    if (!status.ok() || valslice.size() != valsize) {
+      std::cerr << "Unable to read value: "
+                << (status.ok() ? "insufficient data" : status.ToString())
+                << std::endl;
+      return false;
+    }
+
+    status = db->Put(rocksdb::WriteOptions(), keyslice, valslice);
+    if (!status.ok()) {
+      fprintf(stderr, "Unable to write database entry\n");
+      return false;
+    }
+  }
+
+  if (undump_options.compact_db) {
+    status = db->CompactRange(rocksdb::CompactRangeOptions(), nullptr, nullptr);
+    if (!status.ok()) {
+      fprintf(stderr,
+              "Unable to compact the database after loading the dumped file\n");
+      return false;
+    }
+  }
+  return true;
+}
+}  // namespace rocksdb
+#endif  // ROCKSDB_LITE
--- a/tools/dump/rocksdb_dump.cc
+++ b/tools/dump/rocksdb_dump.cc
@ -1,154 +1,63 @@
-//  Copyright (c) 2014, Facebook, Inc.  All rights reserved.
+//  Copyright (c) 2015, 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.

-#ifndef GFLAGS
+#if !(defined GFLAGS) || defined(ROCKSDB_LITE)
+
 #include <cstdio>
 int main() {
+#ifndef GFLAGS
  fprintf(stderr, "Please install gflags to run rocksdb tools\n");
+#endif
+#ifdef ROCKSDB_LITE
+  fprintf(stderr, "DbDumpTool is not supported in ROCKSDB_LITE\n");
+#endif
  return 1;
 }
-#else

-#ifndef __STDC_FORMAT_MACROS
-#define __STDC_FORMAT_MACROS
-#endif
+#else

-#include <inttypes.h>
 #include <gflags/gflags.h>
-#include <iostream>
-
-#include "rocksdb/db.h"
-#include "rocksdb/env.h"
-#include "util/coding.h"
+#include "rocksdb/convenience.h"
+#include "rocksdb/db_dump_tool.h"

-DEFINE_bool(anonymous, false, "Output an empty information blob.");
-
-void usage(const char* name) {
-  std::cout << "usage: " << name << " [--anonymous] <db> <dumpfile>"
-            << std::endl;
-}
+DEFINE_string(db_path, "", "Path to the db that will be dumped");
+DEFINE_string(dump_location, "", "Path to where the dump file location");
+DEFINE_bool(anonymous, false,
+            "Remove information like db path, creation time from dumped file");
+DEFINE_string(db_options, "",
+              "Options string used to open the database that will be dumped");

 int main(int argc, char** argv) {
-  rocksdb::DB* dbptr;
-  rocksdb::Options options;
-  rocksdb::Status status;
-  std::unique_ptr<rocksdb::WritableFile> dumpfile;
-  char hostname[1024];
-  int64_t timesec;
-  std::string abspath;
-  char json[4096];
-
  GFLAGS::ParseCommandLineFlags(&argc, &argv, true);

-  static const char* magicstr = "ROCKDUMP";
-  static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
-
-  if (argc != 3) {
-    usage(argv[0]);
-    exit(1);
-  }
-
-  rocksdb::Env* env = rocksdb::Env::Default();
-
-  // Open the database
-  options.create_if_missing = false;
-  status = rocksdb::DB::OpenForReadOnly(options, argv[1], &dbptr);
-  if (!status.ok()) {
-    std::cerr << "Unable to open database '" << argv[1]
-              << "' for reading: " << status.ToString() << std::endl;
-    exit(1);
-  }
-
-  const std::unique_ptr<rocksdb::DB> db(dbptr);
-
-  status = env->NewWritableFile(argv[2], &dumpfile, rocksdb::EnvOptions());
-  if (!status.ok()) {
-    std::cerr << "Unable to open dump file '" << argv[2]
-              << "' for writing: " << status.ToString() << std::endl;
-    exit(1);
-  }
-
-  rocksdb::Slice magicslice(magicstr, 8);
-  status = dumpfile->Append(magicslice);
-  if (!status.ok()) {
-    std::cerr << "Append failed: " << status.ToString() << std::endl;
-    exit(1);
-  }
-
-  rocksdb::Slice versionslice(versionstr, 8);
-  status = dumpfile->Append(versionslice);
-  if (!status.ok()) {
-    std::cerr << "Append failed: " << status.ToString() << std::endl;
-    exit(1);
+  if (FLAGS_db_path == "" || FLAGS_dump_location == "") {
+    fprintf(stderr, "Please set --db_path and --dump_location\n");
+    return 1;
  }

-  if (FLAGS_anonymous) {
-    snprintf(json, sizeof(json), "{}");
-  } else {
-    status = env->GetHostName(hostname, sizeof(hostname));
-    status = env->GetCurrentTime(&timesec);
-    status = env->GetAbsolutePath(argv[1], &abspath);
-    snprintf(json, sizeof(json),
-             "{ \"database-path\": \"%s\", \"hostname\": \"%s\", "
-             "\"creation-time\": %" PRIi64 " }",
-             abspath.c_str(), hostname, timesec);
-  }
+  rocksdb::DumpOptions dump_options;
+  dump_options.db_path = FLAGS_db_path;
+  dump_options.dump_location = FLAGS_dump_location;
+  dump_options.anonymous = FLAGS_anonymous;

-  rocksdb::Slice infoslice(json, strlen(json));
-  char infosize[4];
-  rocksdb::EncodeFixed32(infosize, (uint32_t)infoslice.size());
-  rocksdb::Slice infosizeslice(infosize, 4);
-  status = dumpfile->Append(infosizeslice);
-  if (!status.ok()) {
-    std::cerr << "Append failed: " << status.ToString() << std::endl;
-    exit(1);
-  }
-  status = dumpfile->Append(infoslice);
-  if (!status.ok()) {
-    std::cerr << "Append failed: " << status.ToString() << std::endl;
-    exit(1);
-  }
-
-  const std::unique_ptr<rocksdb::Iterator> it(
-      db->NewIterator(rocksdb::ReadOptions()));
-  for (it->SeekToFirst(); it->Valid(); it->Next()) {
-    char keysize[4];
-    rocksdb::EncodeFixed32(keysize, (uint32_t)it->key().size());
-    rocksdb::Slice keysizeslice(keysize, 4);
-    status = dumpfile->Append(keysizeslice);
-    if (!status.ok()) {
-      std::cerr << "Append failed: " << status.ToString() << std::endl;
-      exit(1);
+  rocksdb::Options db_options;
+  if (FLAGS_db_options != "") {
+    rocksdb::Options parsed_options;
+    rocksdb::Status s = rocksdb::GetOptionsFromString(
+        db_options, FLAGS_db_options, &parsed_options);
+    if (!s.ok()) {
+      fprintf(stderr, "Cannot parse provided db_options\n");
+      return 1;
    }
-    status = dumpfile->Append(it->key());
-    if (!status.ok()) {
-      std::cerr << "Append failed: " << status.ToString() << std::endl;
-      exit(1);
+    db_options = parsed_options;
  }

-    char valsize[4];
-    rocksdb::EncodeFixed32(valsize, (uint32_t)it->value().size());
-    rocksdb::Slice valsizeslice(valsize, 4);
-    status = dumpfile->Append(valsizeslice);
-    if (!status.ok()) {
-      std::cerr << "Append failed: " << status.ToString() << std::endl;
-      exit(1);
-    }
-    status = dumpfile->Append(it->value());
-    if (!status.ok()) {
-      std::cerr << "Append failed: " << status.ToString() << std::endl;
-      exit(1);
-    }
-  }
-  if (!it->status().ok()) {
-    std::cerr << "Database iteration failed: " << status.ToString()
-              << std::endl;
-    exit(1);
+  rocksdb::DbDumpTool tool;
+  if (!tool.Run(dump_options, db_options)) {
+    return 1;
  }
-
  return 0;
 }
-
-#endif  // GFLAGS
+#endif  // !(defined GFLAGS) || defined(ROCKSDB_LITE)
--- a/tools/dump/rocksdb_undump.cc
+++ b/tools/dump/rocksdb_undump.cc
@ -1,136 +1,62 @@
-//  Copyright (c) 2014, Facebook, Inc.  All rights reserved.
+//  Copyright (c) 2015, 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 <cstring>
-#include <iostream>
+#if !(defined GFLAGS) || defined(ROCKSDB_LITE)

-#include "rocksdb/db.h"
-#include "rocksdb/env.h"
-#include "util/coding.h"
-
-void usage(const char *name) {
-  std::cout << "usage: " << name << " <dumpfile> <rocksdb>" << std::endl;
-}
-
-int main(int argc, char **argv) {
-  rocksdb::DB *dbptr;
-  rocksdb::Options options;
-  rocksdb::Status status;
-  rocksdb::Env *env;
-  std::unique_ptr<rocksdb::SequentialFile> dumpfile;
-  rocksdb::Slice slice;
-  char scratch8[8];
-
-  static const char *magicstr = "ROCKDUMP";
-  static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
-
-  if (argc != 3) {
-    usage(argv[0]);
-    exit(1);
+#include <cstdio>
+int main() {
+#ifndef GFLAGS
+  fprintf(stderr, "Please install gflags to run rocksdb tools\n");
+#endif
+#ifdef ROCKSDB_LITE
+  fprintf(stderr, "DbUndumpTool is not supported in ROCKSDB_LITE\n");
+#endif
+  return 1;
 }

-  env = rocksdb::Env::Default();
+#else

-  status = env->NewSequentialFile(argv[1], &dumpfile, rocksdb::EnvOptions());
-  if (!status.ok()) {
-    std::cerr << "Unable to open dump file '" << argv[1]
-              << "' for reading: " << status.ToString() << std::endl;
-    exit(1);
-  }
-
-  status = dumpfile->Read(8, &slice, scratch8);
-  if (!status.ok() || slice.size() != 8 ||
-      memcmp(slice.data(), magicstr, 8) != 0) {
-    std::cerr << "File '" << argv[1] << "' is not a recognizable dump file."
-              << std::endl;
-    exit(1);
-  }
+#include <gflags/gflags.h>
+#include "rocksdb/convenience.h"
+#include "rocksdb/db_dump_tool.h"

-  status = dumpfile->Read(8, &slice, scratch8);
-  if (!status.ok() || slice.size() != 8 ||
-      memcmp(slice.data(), versionstr, 8) != 0) {
-    std::cerr << "File '" << argv[1] << "' version not recognized."
-              << std::endl;
-    exit(1);
-  }
+DEFINE_string(dump_location, "", "Path to the dump file that will be loaded");
+DEFINE_string(db_path, "", "Path to the db that we will undump the file into");
+DEFINE_bool(compact, false, "Compact the db after loading the dumped file");
+DEFINE_string(db_options, "",
+              "Options string used to open the database that will be loaded");

-  status = dumpfile->Read(4, &slice, scratch8);
-  if (!status.ok() || slice.size() != 4) {
-    std::cerr << "Unable to read info blob size." << std::endl;
-    exit(1);
-  }
-  uint32_t infosize = rocksdb::DecodeFixed32(slice.data());
-  status = dumpfile->Skip(infosize);
-  if (!status.ok()) {
-    std::cerr << "Unable to skip info blob: " << status.ToString() << std::endl;
-    exit(1);
-  }
+int main(int argc, char **argv) {
+  GFLAGS::ParseCommandLineFlags(&argc, &argv, true);

-  options.create_if_missing = true;
-  status = rocksdb::DB::Open(options, argv[2], &dbptr);
-  if (!status.ok()) {
-    std::cerr << "Unable to open database '" << argv[2]
-              << "' for writing: " << status.ToString() << std::endl;
-    exit(1);
+  if (FLAGS_db_path == "" || FLAGS_dump_location == "") {
+    fprintf(stderr, "Please set --db_path and --dump_location\n");
+    return 1;
  }

-  const std::unique_ptr<rocksdb::DB> db(dbptr);
-
-  uint32_t last_keysize = 64;
-  size_t last_valsize = 1 << 20;
-  std::unique_ptr<char[]> keyscratch(new char[last_keysize]);
-  std::unique_ptr<char[]> valscratch(new char[last_valsize]);
-
-  while (1) {
-    uint32_t keysize, valsize;
-    rocksdb::Slice keyslice;
-    rocksdb::Slice valslice;
+  rocksdb::UndumpOptions undump_options;
+  undump_options.db_path = FLAGS_db_path;
+  undump_options.dump_location = FLAGS_dump_location;
+  undump_options.compact_db = FLAGS_compact;

-    status = dumpfile->Read(4, &slice, scratch8);
-    if (!status.ok() || slice.size() != 4) break;
-    keysize = rocksdb::DecodeFixed32(slice.data());
-    if (keysize > last_keysize) {
-      while (keysize > last_keysize) last_keysize *= 2;
-      keyscratch = std::unique_ptr<char[]>(new char[last_keysize]);
+  rocksdb::Options db_options;
+  if (FLAGS_db_options != "") {
+    rocksdb::Options parsed_options;
+    rocksdb::Status s = rocksdb::GetOptionsFromString(
+        db_options, FLAGS_db_options, &parsed_options);
+    if (!s.ok()) {
+      fprintf(stderr, "Cannot parse provided db_options\n");
+      return 1;
    }
-
-    status = dumpfile->Read(keysize, &keyslice, keyscratch.get());
-    if (!status.ok() || keyslice.size() != keysize) {
-      std::cerr << "Key read failure: "
-                << (status.ok() ? "insufficient data" : status.ToString())
-                << std::endl;
-      exit(1);
+    db_options = parsed_options;
  }

-    status = dumpfile->Read(4, &slice, scratch8);
-    if (!status.ok() || slice.size() != 4) {
-      std::cerr << "Unable to read value size: "
-                << (status.ok() ? "insufficient data" : status.ToString())
-                << std::endl;
-      exit(1);
-    }
-    valsize = rocksdb::DecodeFixed32(slice.data());
-    if (valsize > last_valsize) {
-      while (valsize > last_valsize) last_valsize *= 2;
-      valscratch = std::unique_ptr<char[]>(new char[last_valsize]);
+  rocksdb::DbUndumpTool tool;
+  if (!tool.Run(undump_options, db_options)) {
+    return 1;
  }
-
-    status = dumpfile->Read(valsize, &valslice, valscratch.get());
-    if (!status.ok() || valslice.size() != valsize) {
-      std::cerr << "Unable to read value: "
-                << (status.ok() ? "insufficient data" : status.ToString())
-                << std::endl;
-      exit(1);
-    }
-
-    status = db->Put(rocksdb::WriteOptions(), keyslice, valslice);
-    if (!status.ok()) {
-      fprintf(stderr, "Unable to write database entry\n");
-      exit(1);
-    }
-  }
-
  return 0;
 }
+#endif  // !(defined GFLAGS) || defined(ROCKSDB_LITE)
--- a/tools/rocksdb_dump_test.sh
+++ b/tools/rocksdb_dump_test.sh
@ -2,6 +2,6 @@ TESTDIR=`mktemp -d /tmp/rocksdb-dump-test.XXXXX`
 DUMPFILE="tools/sample-dump.dmp"

 # Verify that the sample dump file is undumpable and then redumpable.
-./rocksdb_undump $DUMPFILE $TESTDIR/db
-./rocksdb_dump --anonymous $TESTDIR/db $TESTDIR/dump
+./rocksdb_undump --dump_location=$DUMPFILE --db_path=$TESTDIR/db
+./rocksdb_dump --anonymous --db_path=$TESTDIR/db --dump_location=$TESTDIR/dump
 cmp $DUMPFILE $TESTDIR/dump