Remove disableDataSync option

Summary:
Remove disableDataSync, and another similarly named disable_data_sync options.
This is being done to simplify options, and also because the performance gains of this feature can be achieved by other methods.
Closes https://github.com/facebook/rocksdb/pull/1859

Differential Revision: D4541292

Pulled By: sagar0

fbshipit-source-id: 5b3a6ca

HISTORY.md

@@ -1,5 +1,7 @@
 # Rocksdb Change Log
 ## Unreleased
+### Public API Change
+* Remove disableDataSync option.
 
 ## 5.2.0 (02/08/2017)
 ### Public API Change

build_tools/regression_build_test.sh

@@ -55,7 +55,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0  > ${STAT_FILE}.fillseq
 
@@ -73,7 +72,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=8 > ${STAT_FILE}.overwrite
@@ -92,7 +90,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=1 > /dev/null
@@ -111,7 +108,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readrandom
@@ -131,7 +127,6 @@ make release
     --use_tailing_iterator=1 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readrandomtailing
@@ -150,7 +145,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readrandomsmallblockcache
@@ -171,7 +165,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readrandom_mem_sst
@@ -191,7 +184,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=1 > /dev/null
@@ -210,7 +202,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > /dev/null
@@ -230,7 +221,6 @@ make release
     --disable_auto_compactions=1 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readrandom_filluniquerandom
@@ -251,7 +241,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=16 > ${STAT_FILE}.readwhilewriting
@@ -270,7 +259,6 @@ make release
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --value_size=10 \
@@ -295,7 +283,6 @@ common_in_mem_args="--db=/dev/shm/rocksdb \
     --disable_wal=0 \
     --wal_dir=/dev/shm/rocksdb \
     --sync=0 \
-    --disable_data_sync=1 \
     --verify_checksum=1 \
     --delete_obsolete_files_period_micros=314572800 \
     --max_grandparent_overlap_factor=10 \
@@ -356,7 +343,6 @@ common_in_mem_args="--db=/dev/shm/rocksdb \
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0  > ${STAT_FILE}.fillseq_lots_column_families
 
@@ -372,7 +358,6 @@ common_in_mem_args="--db=/dev/shm/rocksdb \
     --open_files=55000 \
     --statistics=1 \
     --histogram=1 \
-    --disable_data_sync=1 \
     --disable_wal=1 \
     --sync=0 \
     --threads=8 > ${STAT_FILE}.overwrite_lots_column_families

db/builder.cc

@@ -170,7 +170,7 @@ Status BuildTable(
     delete builder;
 
     // Finish and check for file errors
-    if (s.ok() && !empty && !ioptions.disable_data_sync) {
+    if (s.ok() && !empty) {
       StopWatch sw(env, ioptions.statistics, TABLE_SYNC_MICROS);
       file_writer->Sync(ioptions.use_fsync);
     }

db/c.cc

@@ -1713,11 +1713,6 @@ void rocksdb_options_set_prefix_extractor(
   opt->rep.prefix_extractor.reset(prefix_extractor);
 }
 
-void rocksdb_options_set_disable_data_sync(
-    rocksdb_options_t* opt, int disable_data_sync) {
-  opt->rep.disableDataSync = disable_data_sync;
-}
-
 void rocksdb_options_set_use_fsync(
     rocksdb_options_t* opt, int use_fsync) {
   opt->rep.use_fsync = use_fsync;

db/column_family_test.cc

@@ -1148,7 +1148,6 @@ TEST_F(ColumnFamilyTest, DifferentCompactionStyles) {
   CreateColumnFamilies({"one", "two"});
   ColumnFamilyOptions default_cf, one, two;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
 
   default_cf.compaction_style = kCompactionStyleLevel;
   default_cf.num_levels = 3;
@@ -1221,7 +1220,6 @@ TEST_F(ColumnFamilyTest, MultipleManualCompactions) {
   CreateColumnFamilies({"one", "two"});
   ColumnFamilyOptions default_cf, one, two;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
 
   default_cf.compaction_style = kCompactionStyleLevel;
@@ -1319,7 +1317,6 @@ TEST_F(ColumnFamilyTest, AutomaticAndManualCompactions) {
   CreateColumnFamilies({"one", "two"});
   ColumnFamilyOptions default_cf, one, two;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1412,7 +1409,6 @@ TEST_F(ColumnFamilyTest, ManualAndAutomaticCompactions) {
   CreateColumnFamilies({"one", "two"});
   ColumnFamilyOptions default_cf, one, two;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1508,7 +1504,6 @@ TEST_F(ColumnFamilyTest, SameCFManualManualCompactions) {
   CreateColumnFamilies({"one"});
   ColumnFamilyOptions default_cf, one;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1607,7 +1602,6 @@ TEST_F(ColumnFamilyTest, SameCFManualAutomaticCompactions) {
   CreateColumnFamilies({"one"});
   ColumnFamilyOptions default_cf, one;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1697,7 +1691,6 @@ TEST_F(ColumnFamilyTest, SameCFManualAutomaticCompactionsLevel) {
   CreateColumnFamilies({"one"});
   ColumnFamilyOptions default_cf, one;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1794,7 +1787,6 @@ TEST_F(ColumnFamilyTest, SameCFManualAutomaticConflict) {
   CreateColumnFamilies({"one"});
   ColumnFamilyOptions default_cf, one;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 
@@ -1914,7 +1906,6 @@ TEST_F(ColumnFamilyTest, SameCFAutomaticManualCompactions) {
   CreateColumnFamilies({"one"});
   ColumnFamilyOptions default_cf, one;
   db_options_.max_open_files = 20;  // only 10 files in file cache
-  db_options_.disableDataSync = true;
   db_options_.max_background_compactions = 3;
   db_options_.base_background_compactions = 3;
 

db/compaction_job.cc

@@ -538,7 +538,7 @@ Status CompactionJob::Run() {
     thread.join();
   }
 
-  if (output_directory_ && !db_options_.disable_data_sync) {
+  if (output_directory_) {
     output_directory_->Fsync();
   }
 
@@ -1059,7 +1059,7 @@ Status CompactionJob::FinishCompactionOutputFile(
   sub_compact->total_bytes += current_bytes;
 
   // Finish and check for file errors
-  if (s.ok() && !db_options_.disable_data_sync) {
+  if (s.ok()) {
     StopWatch sw(env_, stats_, COMPACTION_OUTFILE_SYNC_MICROS);
     s = sub_compact->outfile->Sync(db_options_.use_fsync);
   }

db/db_impl.cc

@@ -1915,8 +1915,7 @@ Status DBImpl::FlushMemTableToOutputFile(
 
   Status s;
   if (logfile_number_ > 0 &&
-      versions_->GetColumnFamilySet()->NumberOfColumnFamilies() > 0 &&
+      versions_->GetColumnFamilySet()->NumberOfColumnFamilies() > 0) {
-      !immutable_db_options_.disable_data_sync) {
     // If there are more than one column families, we need to make sure that
     // all the log files except the most recent one are synced. Otherwise if
     // the host crashes after flushing and before WAL is persistent, the

db/db_test.cc

@@ -827,7 +827,6 @@ TEST_F(DBTest, GetPicksCorrectFile) {
 TEST_F(DBTest, GetEncountersEmptyLevel) {
   do {
     Options options = CurrentOptions();
-    options.disableDataSync = true;
     CreateAndReopenWithCF({"pikachu"}, options);
     // Arrange for the following to happen:
     //   * sstable A in level 0
@@ -3574,31 +3573,6 @@ TEST_F(DBTest, WriteSingleThreadEntry) {
   }
 }
 
-TEST_F(DBTest, DisableDataSyncTest) {
-  env_->sync_counter_.store(0);
-  // iter 0 -- no sync
-  // iter 1 -- sync
-  for (int iter = 0; iter < 2; ++iter) {
-    Options options = CurrentOptions();
-    options.disableDataSync = iter == 0;
-    options.create_if_missing = true;
-    options.num_levels = 10;
-    options.env = env_;
-    Reopen(options);
-    CreateAndReopenWithCF({"pikachu"}, options);
-
-    MakeTables(10, "a", "z");
-    Compact("a", "z");
-
-    if (iter == 0) {
-      ASSERT_EQ(env_->sync_counter_.load(), 0);
-    } else {
-      ASSERT_GT(env_->sync_counter_.load(), 0);
-    }
-    Destroy(options);
-  }
-}
-
 #ifndef ROCKSDB_LITE
 TEST_F(DBTest, DynamicMemtableOptions) {
   const uint64_t k64KB = 1 << 16;

db/filename.cc

@@ -389,12 +389,8 @@ Status SetIdentityFile(Env* env, const std::string& dbname) {
 Status SyncManifest(Env* env, const ImmutableDBOptions* db_options,
                     WritableFileWriter* file) {
   TEST_KILL_RANDOM("SyncManifest:0", rocksdb_kill_odds * REDUCE_ODDS2);
-  if (db_options->disable_data_sync) {
-    return Status::OK();
-  } else {
   StopWatch sw(env, db_options->statistics.get(), MANIFEST_FILE_SYNC_MICROS);
   return file->Sync(db_options->use_fsync);
-  }
 }
 
 }  // namespace rocksdb

db/flush_job.cc

@@ -313,7 +313,7 @@ Status FlushJob::WriteLevel0Table() {
         meta_.fd.GetFileSize(), s.ToString().c_str(),
         meta_.marked_for_compaction ? " (needs compaction)" : "");
 
-    if (!db_options_.disable_data_sync && output_file_directory_ != nullptr) {
+    if (output_file_directory_ != nullptr) {
       output_file_directory_->Fsync();
     }
     TEST_SYNC_POINT("FlushJob::WriteLevel0Table");

db/version_set.cc

@@ -2363,7 +2363,7 @@ Status VersionSet::LogAndApply(ColumnFamilyData* column_family_data,
     if (s.ok() && new_descriptor_log) {
       s = SetCurrentFile(
           env_, dbname_, pending_manifest_file_number_,
-          db_options_->disable_data_sync ? nullptr : db_directory);
+          db_directory);
     }
 
     if (s.ok()) {

examples/rocksdb_option_file_example.ini

@@ -62,13 +62,11 @@
   create_missing_column_families=false
   paranoid_checks=true
   delete_obsolete_files_period_micros=21600000000
-  disable_data_sync=false
   log_file_time_to_roll=0
   compaction_readahead_size=0
   create_if_missing=false
   use_adaptive_mutex=false
   enable_thread_tracking=false
-  disableDataSync=false
   allow_fallocate=true
   error_if_exists=false
   recycle_log_file_num=0

include/rocksdb/c.h

@@ -705,8 +705,6 @@ rocksdb_options_set_verify_checksums_in_compaction(rocksdb_options_t*,
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_max_sequential_skip_in_iterations(rocksdb_options_t*,
                                                       uint64_t);
-extern ROCKSDB_LIBRARY_API void rocksdb_options_set_disable_data_sync(
-    rocksdb_options_t*, int);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_disable_auto_compactions(
     rocksdb_options_t*, int);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_optimize_filters_for_hits(

include/rocksdb/options.h

@@ -948,14 +948,6 @@ struct DBOptions {
   // If non-null, then we should collect metrics about database operations
   std::shared_ptr<Statistics> statistics = nullptr;
 
-  // If true, then the contents of manifest and data files are not synced
-  // to stable storage. Their contents remain in the OS buffers till the
-  // OS decides to flush them. This option is good for bulk-loading
-  // of data. Once the bulk-loading is complete, please issue a
-  // sync to the OS to flush all dirty buffers to stable storage.
-  // Default: false
-  bool disableDataSync = false;
-
   // If true, then every store to stable storage will issue a fsync.
   // If false, then every store to stable storage will issue a fdatasync.
   // This parameter should be set to true while storing data to

java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java

@@ -545,8 +545,6 @@ public class DbBenchmark {
         (Integer)flags_.get(Flag.max_background_flushes));
     options.setMaxOpenFiles(
         (Integer)flags_.get(Flag.open_files));
-    options.setDisableDataSync(
-        (Boolean)flags_.get(Flag.disable_data_sync));
     options.setUseFsync(
         (Boolean)flags_.get(Flag.use_fsync));
     options.setWalDir(
@@ -1225,12 +1223,6 @@ public class DbBenchmark {
         return parseBoolean(value);
       }
     },
-    disable_data_sync(false,"If true, do not wait until data is\n" +
-        "\tsynced to disk.") {
-      @Override public Object parseValue(String value) {
-        return parseBoolean(value);
-      }
-    },
     use_fsync(false,"If true, issue fsync instead of fdatasync.") {
       @Override public Object parseValue(String value) {
         return parseBoolean(value);

java/rocksjni/options.cc

@@ -342,27 +342,6 @@ void Java_org_rocksdb_Options_setMaxOpenFiles(
       static_cast<int>(max_open_files);
 }
 
-/*
- * Class:     org_rocksdb_Options
- * Method:    disableDataSync
- * Signature: (J)Z
- */
-jboolean Java_org_rocksdb_Options_disableDataSync(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::Options*>(jhandle)->disableDataSync;
-}
-
-/*
- * Class:     org_rocksdb_Options
- * Method:    setDisableDataSync
- * Signature: (JZ)V
- */
-void Java_org_rocksdb_Options_setDisableDataSync(
-    JNIEnv* env, jobject jobj, jlong jhandle, jboolean disableDataSync) {
-  reinterpret_cast<rocksdb::Options*>(jhandle)->disableDataSync =
-      static_cast<bool>(disableDataSync);
-}
-
 /*
  * Class:     org_rocksdb_Options
  * Method:    useFsync
@@ -3748,27 +3727,6 @@ jlong Java_org_rocksdb_DBOptions_statisticsPtr(
   return reinterpret_cast<jlong>(st);
 }
 
-/*
- * Class:     org_rocksdb_DBOptions
- * Method:    setDisableDataSync
- * Signature: (JZ)V
- */
-void Java_org_rocksdb_DBOptions_setDisableDataSync(
-    JNIEnv* env, jobject jobj, jlong jhandle, jboolean disableDataSync) {
-  reinterpret_cast<rocksdb::DBOptions*>(jhandle)->disableDataSync =
-      static_cast<bool>(disableDataSync);
-}
-
-/*
- * Class:     org_rocksdb_DBOptions
- * Method:    disableDataSync
- * Signature: (J)Z
- */
-jboolean Java_org_rocksdb_DBOptions_disableDataSync(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::DBOptions*>(jhandle)->disableDataSync;
-}
-
 /*
  * Class:     org_rocksdb_DBOptions
  * Method:    setUseFsync

java/src/main/java/org/rocksdb/DBOptions.java

@@ -221,20 +221,6 @@ public class DBOptions extends RocksObject implements DBOptionsInterface {
     return new Statistics(statsPtr);
   }
 
-  @Override
-  public DBOptions setDisableDataSync(
-      final boolean disableDataSync) {
-    assert(isOwningHandle());
-    setDisableDataSync(nativeHandle_, disableDataSync);
-    return this;
-  }
-
-  @Override
-  public boolean disableDataSync() {
-    assert(isOwningHandle());
-    return disableDataSync(nativeHandle_);
-  }
-
   @Override
   public DBOptions setUseFsync(
       final boolean useFsync) {
@@ -680,8 +666,6 @@ public long delayedWriteRate(){
   private native long maxTotalWalSize(long handle);
   private native void createStatistics(long optHandle);
   private native long statisticsPtr(long optHandle);
-  private native void setDisableDataSync(long handle, boolean disableDataSync);
-  private native boolean disableDataSync(long handle);
   private native boolean useFsync(long handle);
   private native void setUseFsync(long handle, boolean useFsync);
   private native void setDbLogDir(long handle, String dbLogDir);

java/src/main/java/org/rocksdb/DBOptionsInterface.java

@@ -242,35 +242,6 @@ public interface DBOptionsInterface {
    */
   Statistics statisticsPtr();
 
-  /**
-   * <p>If true, then the contents of manifest and data files are
-   * not synced to stable storage. Their contents remain in the
-   * OS buffers till theOS decides to flush them.</p>
-   *
-   * <p>This option is good for bulk-loading of data.</p>
-   *
-   * <p>Once the bulk-loading is complete, please issue a sync to
-   * the OS to flush all dirty buffers to stable storage.</p>
-   *
-   * <p>Default: false</p>
-   *
-   * @param disableDataSync a boolean flag to specify whether to
-   *     disable data sync.
-   * @return the instance of the current Object.
-   */
-  Object setDisableDataSync(boolean disableDataSync);
-
-  /**
-   * If true, then the contents of data files are not synced
-   * to stable storage. Their contents remain in the OS buffers till the
-   * OS decides to flush them. This option is good for bulk-loading
-   * of data. Once the bulk-loading is complete, please issue a
-   * sync to the OS to flush all dirty buffers to stable storage.
-   *
-   * @return if true, then data-sync is disabled.
-   */
-  boolean disableDataSync();
-
   /**
    * <p>If true, then every store to stable storage will issue a fsync.</p>
    * <p>If false, then every store to stable storage will issue a fdatasync.

java/src/main/java/org/rocksdb/Options.java

@@ -270,19 +270,6 @@ public class Options extends RocksObject
     return this;
   }
 
-  @Override
-  public boolean disableDataSync() {
-    assert(isOwningHandle());
-    return disableDataSync(nativeHandle_);
-  }
-
-  @Override
-  public Options setDisableDataSync(final boolean disableDataSync) {
-    assert(isOwningHandle());
-    setDisableDataSync(nativeHandle_, disableDataSync);
-    return this;
-  }
-
   @Override
   public boolean useFsync() {
     assert(isOwningHandle());
@@ -1256,8 +1243,6 @@ public class Options extends RocksObject
   private native long maxTotalWalSize(long handle);
   private native void createStatistics(long optHandle);
   private native long statisticsPtr(long optHandle);
-  private native void setDisableDataSync(long handle, boolean disableDataSync);
-  private native boolean disableDataSync(long handle);
   private native boolean useFsync(long handle);
   private native void setUseFsync(long handle, boolean useFsync);
   private native void setDbLogDir(long handle, String dbLogDir);

java/src/test/java/org/rocksdb/DBOptionsTest.java

@@ -125,15 +125,6 @@ public class DBOptionsTest {
     }
   }
 
-  @Test
-  public void disableDataSync() {
-    try(final DBOptions opt = new DBOptions()) {
-      final boolean boolValue = rand.nextBoolean();
-      opt.setDisableDataSync(boolValue);
-      assertThat(opt.disableDataSync()).isEqualTo(boolValue);
-    }
-  }
-
   @Test
   public void useFsync() {
     try(final DBOptions opt = new DBOptions()) {

java/src/test/java/org/rocksdb/OptionsTest.java

@@ -408,16 +408,6 @@ public class OptionsTest {
     }
   }
 
-  @Test
-  public void disableDataSync() {
-    try (final Options opt = new Options()) {
-      final boolean boolValue = rand.nextBoolean();
-      opt.setDisableDataSync(boolValue);
-      assertThat(opt.disableDataSync()).
-          isEqualTo(boolValue);
-    }
-  }
-
   @Test
   public void useFsync() {
     try (final Options opt = new Options()) {

table/sst_file_writer.cc

@@ -184,9 +184,7 @@ Status SstFileWriter::Finish(ExternalSstFileInfo* file_info) {
   r->file_info.file_size = r->builder->FileSize();
 
   if (s.ok()) {
-    if (!r->ioptions.disable_data_sync) {
     s = r->file_writer->Sync(r->ioptions.use_fsync);
-    }
     InvalidatePageCache(true /* closing */);
     if (s.ok()) {
       s = r->file_writer->Close();

tools/benchmark.sh

@@ -61,7 +61,6 @@ block_size=${BLOCK_SIZE:-8192}
 const_params="
   --db=$DB_DIR \
   --wal_dir=$WAL_DIR \
-  --disable_data_sync=0 \
   \
   --num=$num_keys \
   --num_levels=6 \

tools/db_bench_tool.cc

@@ -466,9 +466,6 @@ DEFINE_int64(writes, -1, "Number of write operations to do. If negative, do"
 
 DEFINE_bool(sync, false, "Sync all writes to disk");
 
-DEFINE_bool(disable_data_sync, false, "If true, do not wait until data is"
-            " synced to disk.");
-
 DEFINE_bool(use_fsync, false, "If true, issue fsync instead of fdatasync");
 
 DEFINE_bool(disable_wal, false, "If true, do not write WAL for write.");
@@ -2785,7 +2782,6 @@ class Benchmark {
     options.compaction_readahead_size = FLAGS_compaction_readahead_size;
     options.random_access_max_buffer_size = FLAGS_random_access_max_buffer_size;
     options.writable_file_max_buffer_size = FLAGS_writable_file_max_buffer_size;
-    options.disableDataSync = FLAGS_disable_data_sync;
     options.use_fsync = FLAGS_use_fsync;
     options.num_levels = FLAGS_num_levels;
     options.target_file_size_base = FLAGS_target_file_size_base;

tools/db_bench_tool_test.cc

@@ -200,9 +200,7 @@ const std::string options_file_content = R"OPTIONS_FILE(
   is_fd_close_on_exec=true
   bytes_per_sync=1048576
   enable_thread_tracking=true
-  disable_data_sync=false
   recycle_log_file_num=0
-  disableDataSync=false
   create_missing_column_families=false
   log_file_time_to_roll=0
   max_background_flushes=1

tools/db_crashtest.py

@@ -22,7 +22,6 @@ default_params = {
     "use_clock_cache": "false",
     "delpercent": 5,
     "destroy_db_initially": 0,
-    "disable_data_sync": 0,
     "disable_wal": 0,
     "allow_concurrent_memtable_write": 0,
     "iterpercent": 10,
@@ -89,7 +88,6 @@ simple_default_params = {
     "column_families": 1,
     "delpercent": 5,
     "destroy_db_initially": 0,
-    "disable_data_sync": 0,
     "disable_wal": 0,
     "allow_concurrent_memtable_write": lambda: random.randint(0, 1),
     "iterpercent": 10,

tools/db_stress.cc

@@ -276,9 +276,6 @@ DEFINE_bool(statistics, false, "Create database statistics");
 
 DEFINE_bool(sync, false, "Sync all writes to disk");
 
-DEFINE_bool(disable_data_sync, false,
-            "If true, do not wait until data is synced to disk.");
-
 DEFINE_bool(use_fsync, false, "If true, issue fsync instead of fdatasync");
 
 DEFINE_int32(kill_random_test, 0,
@@ -2143,7 +2140,6 @@ class StressTest {
     options_.max_open_files = FLAGS_open_files;
     options_.statistics = dbstats;
     options_.env = FLAGS_env;
-    options_.disableDataSync = FLAGS_disable_data_sync;
     options_.use_fsync = FLAGS_use_fsync;
     options_.allow_mmap_reads = FLAGS_mmap_read;
     options_.target_file_size_base = FLAGS_target_file_size_base;

util/cf_options.cc

@@ -55,7 +55,6 @@ ImmutableCFOptions::ImmutableCFOptions(const ImmutableDBOptions& db_options,
       bloom_locality(cf_options.bloom_locality),
       purge_redundant_kvs_while_flush(
           cf_options.purge_redundant_kvs_while_flush),
-      disable_data_sync(db_options.disable_data_sync),
       use_fsync(db_options.use_fsync),
       compression_per_level(cf_options.compression_per_level),
       bottommost_compression(cf_options.bottommost_compression),

util/cf_options.h

@@ -86,8 +86,6 @@ struct ImmutableCFOptions {
 
   bool purge_redundant_kvs_while_flush;
 
-  bool disable_data_sync;
-
   bool use_fsync;
 
   std::vector<CompressionType> compression_per_level;

util/db_options.cc

@@ -34,7 +34,6 @@ ImmutableDBOptions::ImmutableDBOptions(const DBOptions& options)
       max_open_files(options.max_open_files),
       max_file_opening_threads(options.max_file_opening_threads),
       statistics(options.statistics),
-      disable_data_sync(options.disableDataSync),
       use_fsync(options.use_fsync),
       db_paths(options.db_paths),
       db_log_dir(options.db_log_dir),
@@ -102,8 +101,6 @@ void ImmutableDBOptions::Dump(Logger* log) const {
          max_open_files);
   Header(log, "               Options.max_file_opening_threads: %d",
          max_file_opening_threads);
-  Header(log, "                        Options.disableDataSync: %d",
-         disable_data_sync);
   Header(log, "                              Options.use_fsync: %d", use_fsync);
   Header(log,
          "                      Options.max_log_file_size: %" ROCKSDB_PRIszt,

util/db_options.h

@@ -30,7 +30,6 @@ struct ImmutableDBOptions {
   int max_open_files;
   int max_file_opening_threads;
   std::shared_ptr<Statistics> statistics;
-  bool disable_data_sync;
   bool use_fsync;
   std::vector<DbPath> db_paths;
   std::string db_log_dir;

util/options.cc

@@ -133,7 +133,6 @@ DBOptions::DBOptions(const Options& options)
       max_file_opening_threads(options.max_file_opening_threads),
       max_total_wal_size(options.max_total_wal_size),
       statistics(options.statistics),
-      disableDataSync(options.disableDataSync),
       use_fsync(options.use_fsync),
       db_paths(options.db_paths),
       db_log_dir(options.db_log_dir),
@@ -387,7 +386,6 @@ Options::PrepareForBulkLoad()
   // no auto compactions please. The application should issue a
   // manual compaction after all data is loaded into L0.
   disable_auto_compactions = true;
-  disableDataSync = true;
   // A manual compaction run should pick all files in L0 in
   // a single compaction run.
   max_compaction_bytes = (static_cast<uint64_t>(1) << 60);

util/options_helper.cc

@@ -47,7 +47,6 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
       immutable_db_options.max_file_opening_threads;
   options.max_total_wal_size = mutable_db_options.max_total_wal_size;
   options.statistics = immutable_db_options.statistics;
-  options.disableDataSync = immutable_db_options.disable_data_sync;
   options.use_fsync = immutable_db_options.use_fsync;
   options.db_paths = immutable_db_options.db_paths;
   options.db_log_dir = immutable_db_options.db_log_dir;

util/options_helper.h

@@ -214,11 +214,9 @@ static std::unordered_map<std::string, OptionTypeInfo> db_options_type_info = {
      {offsetof(struct DBOptions, create_missing_column_families),
       OptionType::kBoolean, OptionVerificationType::kNormal, false, 0}},
     {"disableDataSync",
-     {offsetof(struct DBOptions, disableDataSync), OptionType::kBoolean,
+     {0, OptionType::kBoolean, OptionVerificationType::kDeprecated, false, 0}},
-      OptionVerificationType::kNormal, false, 0}},
     {"disable_data_sync",  // for compatibility
-     {offsetof(struct DBOptions, disableDataSync), OptionType::kBoolean,
+     {0, OptionType::kBoolean, OptionVerificationType::kDeprecated, false, 0}},
-      OptionVerificationType::kNormal, false, 0}},
     {"enable_thread_tracking",
      {offsetof(struct DBOptions, enable_thread_tracking), OptionType::kBoolean,
       OptionVerificationType::kNormal, false, 0}},

util/options_settable_test.cc

@@ -260,9 +260,7 @@ TEST_F(OptionsSettableTest, DBOptionsAllFieldsSettable) {
                              "is_fd_close_on_exec=false;"
                              "bytes_per_sync=4295013613;"
                              "enable_thread_tracking=false;"
-                             "disable_data_sync=false;"
                              "recycle_log_file_num=0;"
-                             "disableDataSync=false;"
                              "create_missing_column_families=true;"
                              "log_file_time_to_roll=3097;"
                              "max_background_flushes=35;"

util/options_test.cc

@@ -100,7 +100,6 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
       {"paranoid_checks", "true"},
       {"max_open_files", "32"},
       {"max_total_wal_size", "33"},
-      {"disable_data_sync", "false"},
       {"use_fsync", "true"},
       {"db_log_dir", "/db_log_dir"},
       {"wal_dir", "/wal_dir"},
@@ -215,7 +214,6 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
   ASSERT_EQ(new_db_opt.paranoid_checks, true);
   ASSERT_EQ(new_db_opt.max_open_files, 32);
   ASSERT_EQ(new_db_opt.max_total_wal_size, static_cast<uint64_t>(33));
-  ASSERT_EQ(new_db_opt.disableDataSync, false);
   ASSERT_EQ(new_db_opt.use_fsync, true);
   ASSERT_EQ(new_db_opt.db_log_dir, "/db_log_dir");
   ASSERT_EQ(new_db_opt.wal_dir, "/wal_dir");

util/testutil.cc

@@ -244,7 +244,6 @@ void RandomInitDBOptions(DBOptions* db_opt, Random* rnd) {
   db_opt->use_direct_writes = rnd->Uniform(2);
   db_opt->create_if_missing = rnd->Uniform(2);
   db_opt->create_missing_column_families = rnd->Uniform(2);
-  db_opt->disableDataSync = rnd->Uniform(2);
   db_opt->enable_thread_tracking = rnd->Uniform(2);
   db_opt->error_if_exists = rnd->Uniform(2);
   db_opt->is_fd_close_on_exec = rnd->Uniform(2);

utilities/spatialdb/spatial_db.cc

@@ -698,7 +698,6 @@ DBOptions GetDBOptionsFromSpatialDBOptions(const SpatialDBOptions& options) {
   db_options.statistics = CreateDBStatistics();
   if (options.bulk_load) {
     db_options.stats_dump_period_sec = 600;
-    db_options.disableDataSync = true;
   } else {
     db_options.stats_dump_period_sec = 1800;  // 30min
   }