[rocksdb][PR] Remove option min_partial_merge_operands and verify_checksums_in_comp…

Summary:
…action

 The two options, min_partial_merge_operands and verify_checksums_in_compaction, are not seldom used. Remove them to reduce the total number of options. Also remove them from Java and C interface.
Closes https://github.com/facebook/rocksdb/pull/1902

Differential Revision: D4601219

Pulled By: siying

fbshipit-source-id: aad4cb2

HISTORY.md

@@ -3,6 +3,8 @@
 ### Public API Change
 * Remove disableDataSync option.
 * Remove timeout_hint_us option from WriteOptions. The option has been deprecated and has no effect since 3.13.0.
+* Remove option min_partial_merge_operands. Partial merge operands will always be merged in flush or compaction if there are more than one.
+* Remove option verify_checksums_in_compaction. Compaction will always verify checksum.
 
 ## 5.2.0 (02/08/2017)
 ### Public API Change

db/builder.cc

@@ -122,7 +122,6 @@ Status BuildTable(
 
     MergeHelper merge(env, internal_comparator.user_comparator(),
                       ioptions.merge_operator, nullptr, ioptions.info_log,
-                      mutable_cf_options.min_partial_merge_operands,
                       true /* internal key corruption is not ok */,
                       snapshots.empty() ? 0 : snapshots.back());
 

db/c.cc

@@ -1824,11 +1824,6 @@ void rocksdb_options_set_enable_write_thread_adaptive_yield(
   opt->rep.enable_write_thread_adaptive_yield = v;
 }
 
-void rocksdb_options_set_verify_checksums_in_compaction(
-    rocksdb_options_t* opt, unsigned char v) {
-  opt->rep.verify_checksums_in_compaction = v;
-}
-
 void rocksdb_options_set_max_sequential_skip_in_iterations(
     rocksdb_options_t* opt, uint64_t v) {
   opt->rep.max_sequential_skip_in_iterations = v;
@@ -1980,11 +1975,6 @@ void rocksdb_options_set_max_successive_merges(
   opt->rep.max_successive_merges = v;
 }
 
-void rocksdb_options_set_min_partial_merge_operands(
-    rocksdb_options_t* opt, uint32_t v) {
-  opt->rep.min_partial_merge_operands = v;
-}
-
 void rocksdb_options_set_bloom_locality(
     rocksdb_options_t* opt, uint32_t v) {
   opt->rep.bloom_locality = v;

db/compaction_iterator_test.cc

@@ -182,7 +182,7 @@ class CompactionIteratorTest : public testing::Test {
     }
 
     merge_helper_.reset(new MergeHelper(Env::Default(), cmp_, merge_op, filter,
-                                        nullptr, 0U, false, 0, 0, nullptr,
+                                        nullptr, false, 0, 0, nullptr,
                                         &shutting_down_));
     iter_.reset(new LoggingForwardVectorIterator(ks, vs));
     iter_->SeekToFirst();

db/compaction_job.cc

@@ -721,7 +721,6 @@ void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) {
   MergeHelper merge(
       env_, cfd->user_comparator(), cfd->ioptions()->merge_operator,
       compaction_filter, db_options_.info_log.get(),
-      mutable_cf_options->min_partial_merge_operands,
       false /* internal key corruption is expected */,
       existing_snapshots_.empty() ? 0 : existing_snapshots_.back(),
       compact_->compaction->level(), db_options_.statistics.get(),

db/db_test.cc

@@ -4691,12 +4691,6 @@ TEST_F(DBTest, DynamicMiscOptions) {
   ASSERT_OK(dbfull()->TEST_GetLatestMutableCFOptions(handles_[1],
                                                      &mutable_cf_options));
   ASSERT_EQ(true, mutable_cf_options.report_bg_io_stats);
-  // Test min_partial_merge_operands
-  ASSERT_OK(
-      dbfull()->SetOptions(handles_[1], {{"min_partial_merge_operands", "4"}}));
-  ASSERT_OK(dbfull()->TEST_GetLatestMutableCFOptions(handles_[1],
-                                                     &mutable_cf_options));
-  ASSERT_EQ(4, mutable_cf_options.min_partial_merge_operands);
   // Test compression
   // sanity check
   ASSERT_OK(dbfull()->SetOptions({{"compression", "kNoCompression"}}));

db/merge_helper.cc

@@ -283,8 +283,7 @@ Status MergeHelper::MergeUntil(InternalIterator* iter,
     // Attempt to use the user's associative merge function to
     // merge the stacked merge operands into a single operand.
     s = Status::MergeInProgress();
-    if (merge_context_.GetNumOperands() >= 2 &&
-        merge_context_.GetNumOperands() >= min_partial_merge_operands_) {
+    if (merge_context_.GetNumOperands() >= 2) {
       bool merge_success = false;
       std::string merge_result;
       {

db/merge_helper.h

@@ -32,7 +32,6 @@ class MergeHelper {
   MergeHelper(Env* env, const Comparator* user_comparator,
               const MergeOperator* user_merge_operator,
               const CompactionFilter* compaction_filter, Logger* logger,
-              unsigned min_partial_merge_operands,
               bool assert_valid_internal_key, SequenceNumber latest_snapshot,
               int level = 0, Statistics* stats = nullptr,
               const std::atomic<bool>* shutting_down = nullptr)
@@ -42,7 +41,6 @@ class MergeHelper {
         compaction_filter_(compaction_filter),
         shutting_down_(shutting_down),
         logger_(logger),
-        min_partial_merge_operands_(min_partial_merge_operands),
         assert_valid_internal_key_(assert_valid_internal_key),
         latest_snapshot_(latest_snapshot),
         level_(level),
@@ -156,7 +154,6 @@ class MergeHelper {
   const CompactionFilter* compaction_filter_;
   const std::atomic<bool>* shutting_down_;
   Logger* logger_;
-  unsigned min_partial_merge_operands_;
   bool assert_valid_internal_key_; // enforce no internal key corruption?
   SequenceNumber latest_snapshot_;
   int level_;

db/merge_helper_test.cc

@@ -28,7 +28,7 @@ class MergeHelperTest : public testing::Test {
     iter_->SeekToFirst();
     merge_helper_.reset(new MergeHelper(env_, BytewiseComparator(),
                                         merge_op_.get(), filter_.get(), nullptr,
-                                        2U, false, latest_snapshot));
+                                        false, latest_snapshot));
     return merge_helper_->MergeUntil(iter_.get(), nullptr /* range_del_agg */,
                                      stop_before, at_bottom);
   }

db/merge_test.cc

@@ -76,14 +76,12 @@ class CountMergeOperator : public AssociativeMergeOperator {
 
 namespace {
 std::shared_ptr<DB> OpenDb(const std::string& dbname, const bool ttl = false,
-                           const size_t max_successive_merges = 0,
-                           const uint32_t min_partial_merge_operands = 2) {
+                           const size_t max_successive_merges = 0) {
   DB* db;
   Options options;
   options.create_if_missing = true;
   options.merge_operator = std::make_shared<CountMergeOperator>();
   options.max_successive_merges = max_successive_merges;
-  options.min_partial_merge_operands = min_partial_merge_operands;
   Status s;
   DestroyDB(dbname, Options());
 // DBWithTTL is not supported in ROCKSDB_LITE
@@ -448,22 +446,22 @@ void runTest(int argc, const std::string& dbname, const bool use_ttl = false) {
   {
     std::cout << "Test Partial-Merge\n";
     size_t max_merge = 100;
-    for (uint32_t min_merge = 5; min_merge < 25; min_merge += 5) {
+    // Min merge is hard-coded to 2.
+    uint32_t min_merge = 2;
     for (uint32_t count = min_merge - 1; count <= min_merge + 1; count++) {
-        auto db = OpenDb(dbname, use_ttl, max_merge, min_merge);
+      auto db = OpenDb(dbname, use_ttl, max_merge);
       MergeBasedCounters counters(db, 0);
       testPartialMerge(&counters, db.get(), max_merge, min_merge, count);
       DestroyDB(dbname, Options());
     }
     {
-        auto db = OpenDb(dbname, use_ttl, max_merge, min_merge);
+      auto db = OpenDb(dbname, use_ttl, max_merge);
       MergeBasedCounters counters(db, 0);
       testPartialMerge(&counters, db.get(), max_merge, min_merge,
                        min_merge * 10);
       DestroyDB(dbname, Options());
     }
   }
-  }
 
   {
     std::cout << "Test merge-operator not set after reopen\n";

db/version_set.cc

@@ -3431,8 +3431,7 @@ InternalIterator* VersionSet::MakeInputIterator(
     const Compaction* c, RangeDelAggregator* range_del_agg) {
   auto cfd = c->column_family_data();
   ReadOptions read_options;
-  read_options.verify_checksums =
-    c->mutable_cf_options()->verify_checksums_in_compaction;
+  read_options.verify_checksums = true;
   read_options.fill_cache = false;
   if (c->ShouldFormSubcompactions()) {
     read_options.total_order_seek = true;

include/rocksdb/c.h

@@ -700,9 +700,6 @@ extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_enable_write_thread_adaptive_yield(rocksdb_options_t*,
                                                        unsigned char);
 extern ROCKSDB_LIBRARY_API void
-rocksdb_options_set_verify_checksums_in_compaction(rocksdb_options_t*,
-                                                   unsigned char);
-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_auto_compactions(
@@ -735,8 +732,6 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_huge_page_size(
 
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_max_successive_merges(
     rocksdb_options_t*, size_t);
-extern ROCKSDB_LIBRARY_API void rocksdb_options_set_min_partial_merge_operands(
-    rocksdb_options_t*, uint32_t);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_bloom_locality(
     rocksdb_options_t*, uint32_t);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_inplace_update_support(

include/rocksdb/merge_operator.h

@@ -165,10 +165,8 @@ class MergeOperator {
   //
   // The string that new_value is pointing to will be empty.
   //
-  // The PartialMergeMulti function will be called only when the list of
-  // operands are long enough. The minimum amount of operands that will be
-  // passed to the function are specified by the "min_partial_merge_operands"
-  // option.
+  // The PartialMergeMulti function will be called when there are at least two
+  // operands.
   //
   // In the default implementation, PartialMergeMulti will invoke PartialMerge
   // multiple times, where each time it only merges two operands.  Developers

include/rocksdb/options.h

@@ -615,13 +615,6 @@ struct ColumnFamilyOptions {
   // Default: kByCompensatedSize
   CompactionPri compaction_pri = kByCompensatedSize;
 
-  // If true, compaction will verify checksum on every read that happens
-  // as part of compaction
-  //
-  // Default: true
-  //
-  // Dynamically changeable through SetOptions() API
-  bool verify_checksums_in_compaction = true;
 
   // The options needed to support Universal Style compactions
   CompactionOptionsUniversal compaction_options_universal;
@@ -798,15 +791,6 @@ struct ColumnFamilyOptions {
   // Dynamically changeable through SetOptions() API
   size_t max_successive_merges = 0;
 
-  // The number of partial merge operands to accumulate before partial
-  // merge will be performed. Partial merge will not be called
-  // if the list of values to merge is less than min_partial_merge_operands.
-  //
-  // If min_partial_merge_operands < 2, then it will be treated as 2.
-  //
-  // Default: 2
-  uint32_t min_partial_merge_operands = 2;
-
   // This flag specifies that the implementation should optimize the filters
   // mainly for cases where keys are found rather than also optimize for keys
   // missed. This would be used in cases where the application knows that

java/rocksjni/options.cc

@@ -1707,30 +1707,6 @@ void Java_org_rocksdb_Options_setPurgeRedundantKvsWhileFlush(
           static_cast<bool>(jpurge_redundant_kvs_while_flush);
 }
 
-/*
- * Class:     org_rocksdb_Options
- * Method:    verifyChecksumsInCompaction
- * Signature: (J)Z
- */
-jboolean Java_org_rocksdb_Options_verifyChecksumsInCompaction(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::Options*>(
-      jhandle)->verify_checksums_in_compaction;
-}
-
-/*
- * Class:     org_rocksdb_Options
- * Method:    setVerifyChecksumsInCompaction
- * Signature: (JZ)V
- */
-void Java_org_rocksdb_Options_setVerifyChecksumsInCompaction(
-    JNIEnv* env, jobject jobj, jlong jhandle,
-    jboolean jverify_checksums_in_compaction) {
-  reinterpret_cast<rocksdb::Options*>(
-      jhandle)->verify_checksums_in_compaction =
-          static_cast<bool>(jverify_checksums_in_compaction);
-}
-
 /*
  * Class:     org_rocksdb_Options
  * Method:    maxSequentialSkipInIterations
@@ -1882,30 +1858,6 @@ void Java_org_rocksdb_Options_setMaxSuccessiveMerges(
   }
 }
 
-/*
- * Class:     org_rocksdb_Options
- * Method:    minPartialMergeOperands
- * Signature: (J)I
- */
-jint Java_org_rocksdb_Options_minPartialMergeOperands(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::Options*>(
-      jhandle)->min_partial_merge_operands;
-}
-
-/*
- * Class:     org_rocksdb_Options
- * Method:    setMinPartialMergeOperands
- * Signature: (JI)V
- */
-void Java_org_rocksdb_Options_setMinPartialMergeOperands(
-    JNIEnv* env, jobject jobj, jlong jhandle,
-    jint jmin_partial_merge_operands) {
-  reinterpret_cast<rocksdb::Options*>(
-      jhandle)->min_partial_merge_operands =
-          static_cast<int32_t>(jmin_partial_merge_operands);
-}
-
 /*
  * Class:     org_rocksdb_Options
  * Method:    optimizeFiltersForHits
@@ -3013,30 +2965,6 @@ void Java_org_rocksdb_ColumnFamilyOptions_setPurgeRedundantKvsWhileFlush(
           static_cast<bool>(jpurge_redundant_kvs_while_flush);
 }
 
-/*
- * Class:     org_rocksdb_ColumnFamilyOptions
- * Method:    verifyChecksumsInCompaction
- * Signature: (J)Z
- */
-jboolean Java_org_rocksdb_ColumnFamilyOptions_verifyChecksumsInCompaction(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::ColumnFamilyOptions*>(
-      jhandle)->verify_checksums_in_compaction;
-}
-
-/*
- * Class:     org_rocksdb_ColumnFamilyOptions
- * Method:    setVerifyChecksumsInCompaction
- * Signature: (JZ)V
- */
-void Java_org_rocksdb_ColumnFamilyOptions_setVerifyChecksumsInCompaction(
-    JNIEnv* env, jobject jobj, jlong jhandle,
-    jboolean jverify_checksums_in_compaction) {
-  reinterpret_cast<rocksdb::ColumnFamilyOptions*>(
-      jhandle)->verify_checksums_in_compaction =
-          static_cast<bool>(jverify_checksums_in_compaction);
-}
-
 /*
  * Class:     org_rocksdb_ColumnFamilyOptions
  * Method:    maxSequentialSkipInIterations
@@ -3189,30 +3117,6 @@ void Java_org_rocksdb_ColumnFamilyOptions_setMaxSuccessiveMerges(
   }
 }
 
-/*
- * Class:     org_rocksdb_ColumnFamilyOptions
- * Method:    minPartialMergeOperands
- * Signature: (J)I
- */
-jint Java_org_rocksdb_ColumnFamilyOptions_minPartialMergeOperands(
-    JNIEnv* env, jobject jobj, jlong jhandle) {
-  return reinterpret_cast<rocksdb::ColumnFamilyOptions*>(
-      jhandle)->min_partial_merge_operands;
-}
-
-/*
- * Class:     org_rocksdb_ColumnFamilyOptions
- * Method:    setMinPartialMergeOperands
- * Signature: (JI)V
- */
-void Java_org_rocksdb_ColumnFamilyOptions_setMinPartialMergeOperands(
-    JNIEnv* env, jobject jobj, jlong jhandle,
-    jint jmin_partial_merge_operands) {
-  reinterpret_cast<rocksdb::ColumnFamilyOptions*>(
-      jhandle)->min_partial_merge_operands =
-          static_cast<int32_t>(jmin_partial_merge_operands);
-}
-
 /*
  * Class:     org_rocksdb_ColumnFamilyOptions
  * Method:    optimizeFiltersForHits

java/src/main/java/org/rocksdb/ColumnFamilyOptions.java

@@ -473,19 +473,6 @@ public class ColumnFamilyOptions extends RocksObject
     return maxTableFilesSizeFIFO(nativeHandle_);
   }
 
-  @Override
-  public ColumnFamilyOptions setVerifyChecksumsInCompaction(
-      final boolean verifyChecksumsInCompaction) {
-    setVerifyChecksumsInCompaction(
-        nativeHandle_, verifyChecksumsInCompaction);
-    return this;
-  }
-
-  @Override
-  public boolean verifyChecksumsInCompaction() {
-    return verifyChecksumsInCompaction(nativeHandle_);
-  }
-
   @Override
   public ColumnFamilyOptions setMaxSequentialSkipInIterations(
       final long maxSequentialSkipInIterations) {
@@ -586,18 +573,6 @@ public class ColumnFamilyOptions extends RocksObject
     return maxSuccessiveMerges(nativeHandle_);
   }
 
-  @Override
-  public ColumnFamilyOptions setMinPartialMergeOperands(
-      final int minPartialMergeOperands) {
-    setMinPartialMergeOperands(nativeHandle_, minPartialMergeOperands);
-    return this;
-  }
-
-  @Override
-  public int minPartialMergeOperands() {
-    return minPartialMergeOperands(nativeHandle_);
-  }
-
   @Override
   public ColumnFamilyOptions setOptimizeFiltersForHits(
       final boolean optimizeFiltersForHits) {
@@ -802,9 +777,6 @@ public class ColumnFamilyOptions extends RocksObject
   private native void setPurgeRedundantKvsWhileFlush(
       long handle, boolean purgeRedundantKvsWhileFlush);
   private native boolean purgeRedundantKvsWhileFlush(long handle);
-  private native void setVerifyChecksumsInCompaction(
-      long handle, boolean verifyChecksumsInCompaction);
-  private native boolean verifyChecksumsInCompaction(long handle);
   private native void setMaxSequentialSkipInIterations(
       long handle, long maxSequentialSkipInIterations);
   private native long maxSequentialSkipInIterations(long handle);
@@ -829,9 +801,6 @@ public class ColumnFamilyOptions extends RocksObject
       long handle, long maxSuccessiveMerges)
       throws IllegalArgumentException;
   private native long maxSuccessiveMerges(long handle);
-  private native void setMinPartialMergeOperands(
-      long handle, int minPartialMergeOperands);
-  private native int minPartialMergeOperands(long handle);
   private native void setOptimizeFiltersForHits(long handle,
       boolean optimizeFiltersForHits);
   private native boolean optimizeFiltersForHits(long handle);

java/src/main/java/org/rocksdb/ColumnFamilyOptionsInterface.java

@@ -699,33 +699,6 @@ public interface ColumnFamilyOptionsInterface {
    */
   int bloomLocality();
 
-  /**
-   * The number of partial merge operands to accumulate before partial
-   * merge will be performed. Partial merge will not be called
-   * if the list of values to merge is less than min_partial_merge_operands.
-   *
-   * If min_partial_merge_operands < 2, then it will be treated as 2.
-   *
-   * Default: 2
-   *
-   * @param minPartialMergeOperands min partial merge operands
-   * @return the reference to the current option.
-   */
-  Object setMinPartialMergeOperands(int minPartialMergeOperands);
-
-  /**
-   * The number of partial merge operands to accumulate before partial
-   * merge will be performed. Partial merge will not be called
-   * if the list of values to merge is less than min_partial_merge_operands.
-   *
-   * If min_partial_merge_operands < 2, then it will be treated as 2.
-   *
-   * Default: 2
-   *
-   * @return min partial merge operands
-   */
-  int minPartialMergeOperands();
-
   /**
    * <p>This flag specifies that the implementation should optimize the filters
    * mainly for cases where keys are found rather than also optimize for keys

java/src/main/java/org/rocksdb/MutableColumnFamilyOptions.java

@@ -148,8 +148,7 @@ public class MutableColumnFamilyOptions {
     target_file_size_multiplier(ValueType.INT),
     max_bytes_for_level_base(ValueType.LONG),
     max_bytes_for_level_multiplier(ValueType.INT),
-    max_bytes_for_level_multiplier_additional(ValueType.INT_ARRAY),
-    verify_checksums_in_compaction(ValueType.BOOLEAN);
+    max_bytes_for_level_multiplier_additional(ValueType.INT_ARRAY);
 
     private final ValueType valueType;
     CompactionOption(final ValueType valueType) {
@@ -866,18 +865,6 @@ public class MutableColumnFamilyOptions {
           CompactionOption.max_bytes_for_level_multiplier_additional);
     }
 
-    @Override
-    public MutableColumnFamilyOptionsBuilder setVerifyChecksumsInCompaction(
-        final boolean verifyChecksumsInCompaction) {
-      return setBoolean(CompactionOption.verify_checksums_in_compaction,
-          verifyChecksumsInCompaction);
-    }
-
-    @Override
-    public boolean verifyChecksumsInCompaction() {
-      return getBoolean(CompactionOption.verify_checksums_in_compaction);
-    }
-
     @Override
     public MutableColumnFamilyOptionsBuilder setMaxSequentialSkipInIterations(
         final long maxSequentialSkipInIterations) {

java/src/main/java/org/rocksdb/MutableColumnFamilyOptionsInterface.java

@@ -543,26 +543,6 @@ public interface MutableColumnFamilyOptionsInterface {
    */
   int[] maxBytesForLevelMultiplierAdditional();
 
-  /**
-   * If true, compaction will verify checksum on every read that happens
-   * as part of compaction
-   * Default: true
-   *
-   * @param verifyChecksumsInCompaction true if compaction verifies
-   *     checksum on every read.
-   * @return the reference to the current option.
-   */
-  MutableColumnFamilyOptionsInterface setVerifyChecksumsInCompaction(
-      boolean verifyChecksumsInCompaction);
-
-  /**
-   * If true, compaction will verify checksum on every read that happens
-   * as part of compaction
-   * Default: true
-   *
-   * @return true if compaction verifies checksum on every read.
-   */
-  boolean verifyChecksumsInCompaction();
 
   /**
    * An iteration->Next() sequentially skips over keys with the same

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

@@ -997,19 +997,6 @@ public class Options extends RocksObject
     return this;
   }
 
-  @Override
-  public boolean verifyChecksumsInCompaction() {
-    return verifyChecksumsInCompaction(nativeHandle_);
-  }
-
-  @Override
-  public Options setVerifyChecksumsInCompaction(
-      final boolean verifyChecksumsInCompaction) {
-    setVerifyChecksumsInCompaction(
-        nativeHandle_, verifyChecksumsInCompaction);
-    return this;
-  }
-
   @Override
   public long maxSequentialSkipInIterations() {
     return maxSequentialSkipInIterations(nativeHandle_);
@@ -1092,18 +1079,6 @@ public class Options extends RocksObject
     return this;
   }
 
-  @Override
-  public int minPartialMergeOperands() {
-    return minPartialMergeOperands(nativeHandle_);
-  }
-
-  @Override
-  public Options setMinPartialMergeOperands(
-      final int minPartialMergeOperands) {
-    setMinPartialMergeOperands(nativeHandle_, minPartialMergeOperands);
-    return this;
-  }
-
   @Override
   public Options setOptimizeFiltersForHits(
       final boolean optimizeFiltersForHits) {
@@ -1406,9 +1381,6 @@ public class Options extends RocksObject
   private native void setPurgeRedundantKvsWhileFlush(
       long handle, boolean purgeRedundantKvsWhileFlush);
   private native boolean purgeRedundantKvsWhileFlush(long handle);
-  private native void setVerifyChecksumsInCompaction(
-      long handle, boolean verifyChecksumsInCompaction);
-  private native boolean verifyChecksumsInCompaction(long handle);
   private native void setMaxSequentialSkipInIterations(
       long handle, long maxSequentialSkipInIterations);
   private native long maxSequentialSkipInIterations(long handle);
@@ -1433,9 +1405,6 @@ public class Options extends RocksObject
       long handle, long maxSuccessiveMerges)
       throws IllegalArgumentException;
   private native long maxSuccessiveMerges(long handle);
-  private native void setMinPartialMergeOperands(
-      long handle, int minPartialMergeOperands);
-  private native int minPartialMergeOperands(long handle);
   private native void setOptimizeFiltersForHits(long handle,
       boolean optimizeFiltersForHits);
   private native boolean optimizeFiltersForHits(long handle);

java/src/test/java/org/rocksdb/ColumnFamilyOptionsTest.java

@@ -297,15 +297,6 @@ public class ColumnFamilyOptionsTest {
     }
   }
 
-  @Test
-  public void verifyChecksumsInCompaction() {
-    try (final ColumnFamilyOptions opt = new ColumnFamilyOptions()) {
-      final boolean boolValue = rand.nextBoolean();
-      opt.setVerifyChecksumsInCompaction(boolValue);
-      assertThat(opt.verifyChecksumsInCompaction()).isEqualTo(boolValue);
-    }
-  }
-
   @Test
   public void maxSequentialSkipInIterations() {
     try (final ColumnFamilyOptions opt = new ColumnFamilyOptions()) {
@@ -369,15 +360,6 @@ public class ColumnFamilyOptionsTest {
     }
   }
 
-  @Test
-  public void minPartialMergeOperands() {
-    try (final ColumnFamilyOptions opt = new ColumnFamilyOptions()) {
-      final int intValue = rand.nextInt();
-      opt.setMinPartialMergeOperands(intValue);
-      assertThat(opt.minPartialMergeOperands()).isEqualTo(intValue);
-    }
-  }
-
   @Test
   public void optimizeFiltersForHits() {
     try (final ColumnFamilyOptions opt = new ColumnFamilyOptions()) {

java/src/test/java/org/rocksdb/MutableColumnFamilyOptionsTest.java

@@ -21,13 +21,11 @@ public class MutableColumnFamilyOptionsTest {
             .setWriteBufferSize(10)
             .setInplaceUpdateNumLocks(5)
             .setDisableAutoCompactions(true)
-            .setVerifyChecksumsInCompaction(false)
             .setParanoidFileChecks(true);
 
     assertThat(builder.writeBufferSize()).isEqualTo(10);
     assertThat(builder.inplaceUpdateNumLocks()).isEqualTo(5);
     assertThat(builder.disableAutoCompactions()).isEqualTo(true);
-    assertThat(builder.verifyChecksumsInCompaction()).isEqualTo(false);
     assertThat(builder.paranoidFileChecks()).isEqualTo(true);
   }
 
@@ -66,21 +64,18 @@ public class MutableColumnFamilyOptionsTest {
         .setWriteBufferSize(10)
         .setInplaceUpdateNumLocks(5)
         .setDisableAutoCompactions(true)
-        .setVerifyChecksumsInCompaction(false)
         .setParanoidFileChecks(true)
         .build()
         .toString();
 
     assertThat(str).isEqualTo("write_buffer_size=10;inplace_update_num_locks=5;"
-        + "disable_auto_compactions=true;verify_checksums_in_compaction=false;"
-        + "paranoid_file_checks=true");
+        + "disable_auto_compactions=true;paranoid_file_checks=true");
   }
 
   @Test
   public void mutableColumnFamilyOptions_parse() {
     final String str = "write_buffer_size=10;inplace_update_num_locks=5;"
-        + "disable_auto_compactions=true;verify_checksums_in_compaction=false;"
-        + "paranoid_file_checks=true";
+        + "disable_auto_compactions=true;paranoid_file_checks=true";
 
     final MutableColumnFamilyOptionsBuilder builder =
         MutableColumnFamilyOptions.parse(str);
@@ -88,7 +83,6 @@ public class MutableColumnFamilyOptionsTest {
     assertThat(builder.writeBufferSize()).isEqualTo(10);
     assertThat(builder.inplaceUpdateNumLocks()).isEqualTo(5);
     assertThat(builder.disableAutoCompactions()).isEqualTo(true);
-    assertThat(builder.verifyChecksumsInCompaction()).isEqualTo(false);
     assertThat(builder.paranoidFileChecks()).isEqualTo(true);
   }
 }

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

@@ -260,15 +260,6 @@ public class OptionsTest {
     }
   }
 
-  @Test
-  public void verifyChecksumsInCompaction() {
-    try (final Options opt = new Options()) {
-      final boolean boolValue = rand.nextBoolean();
-      opt.setVerifyChecksumsInCompaction(boolValue);
-      assertThat(opt.verifyChecksumsInCompaction()).isEqualTo(boolValue);
-    }
-  }
-
   @Test
   public void maxSequentialSkipInIterations() {
     try (final Options opt = new Options()) {
@@ -332,15 +323,6 @@ public class OptionsTest {
     }
   }
 
-  @Test
-  public void minPartialMergeOperands() {
-    try (final Options opt = new Options()) {
-      final int intValue = rand.nextInt();
-      opt.setMinPartialMergeOperands(intValue);
-      assertThat(opt.minPartialMergeOperands()).isEqualTo(intValue);
-    }
-  }
-
   @Test
   public void optimizeFiltersForHits() {
     try (final Options opt = new Options()) {

util/cf_options.cc

@@ -158,8 +158,6 @@ void MutableCFOptions::Dump(Logger* log) const {
   }
 
   Log(log, "max_bytes_for_level_multiplier_additional: %s", result.c_str());
-  Log(log, "           verify_checksums_in_compaction: %d",
-      verify_checksums_in_compaction);
   Log(log, "        max_sequential_skip_in_iterations: %" PRIu64,
       max_sequential_skip_in_iterations);
   Log(log, "                     paranoid_file_checks: %d",
@@ -167,8 +165,6 @@ void MutableCFOptions::Dump(Logger* log) const {
   Log(log, "                       report_bg_io_stats: %d", report_bg_io_stats);
   Log(log, "                              compression: %d",
       static_cast<int>(compression));
-  Log(log, "               min_partial_merge_operands: %" PRIu32,
-      min_partial_merge_operands);
 }
 
 }  // namespace rocksdb

util/cf_options.h

@@ -145,13 +145,11 @@ struct MutableCFOptions {
         max_bytes_for_level_multiplier(options.max_bytes_for_level_multiplier),
         max_bytes_for_level_multiplier_additional(
             options.max_bytes_for_level_multiplier_additional),
-        verify_checksums_in_compaction(options.verify_checksums_in_compaction),
         max_sequential_skip_in_iterations(
             options.max_sequential_skip_in_iterations),
         paranoid_file_checks(options.paranoid_file_checks),
         report_bg_io_stats(options.report_bg_io_stats),
-        compression(options.compression),
-        min_partial_merge_operands(options.min_partial_merge_operands) {
+        compression(options.compression) {
     RefreshDerivedOptions(options.num_levels, options.compaction_style);
   }
 
@@ -174,12 +172,10 @@ struct MutableCFOptions {
         target_file_size_multiplier(0),
         max_bytes_for_level_base(0),
         max_bytes_for_level_multiplier(0),
-        verify_checksums_in_compaction(false),
         max_sequential_skip_in_iterations(0),
         paranoid_file_checks(false),
         report_bg_io_stats(false),
-        compression(Snappy_Supported() ? kSnappyCompression : kNoCompression),
-        min_partial_merge_operands(2) {}
+        compression(Snappy_Supported() ? kSnappyCompression : kNoCompression) {}
 
   // Must be called after any change to MutableCFOptions
   void RefreshDerivedOptions(int num_levels, CompactionStyle compaction_style);
@@ -222,14 +218,12 @@ struct MutableCFOptions {
   uint64_t max_bytes_for_level_base;
   double max_bytes_for_level_multiplier;
   std::vector<int> max_bytes_for_level_multiplier_additional;
-  bool verify_checksums_in_compaction;
 
   // Misc options
   uint64_t max_sequential_skip_in_iterations;
   bool paranoid_file_checks;
   bool report_bg_io_stats;
   CompressionType compression;
-  uint32_t min_partial_merge_operands;
 
   // Derived options
   // Per-level target file size.

util/options.cc

@@ -85,7 +85,6 @@ ColumnFamilyOptions::ColumnFamilyOptions(const Options& options)
       purge_redundant_kvs_while_flush(options.purge_redundant_kvs_while_flush),
       compaction_style(options.compaction_style),
       compaction_pri(options.compaction_pri),
-      verify_checksums_in_compaction(options.verify_checksums_in_compaction),
       compaction_options_universal(options.compaction_options_universal),
       compaction_options_fifo(options.compaction_options_fifo),
       max_sequential_skip_in_iterations(
@@ -104,7 +103,6 @@ ColumnFamilyOptions::ColumnFamilyOptions(const Options& options)
           options.memtable_insert_with_hint_prefix_extractor),
       bloom_locality(options.bloom_locality),
       max_successive_merges(options.max_successive_merges),
-      min_partial_merge_operands(options.min_partial_merge_operands),
       optimize_filters_for_hits(options.optimize_filters_for_hits),
       paranoid_file_checks(options.paranoid_file_checks),
       force_consistency_checks(options.force_consistency_checks),
@@ -282,8 +280,6 @@ void ColumnFamilyOptions::Dump(Logger* log) const {
         rate_limit_delay_max_milliseconds);
     Header(log, "               Options.disable_auto_compactions: %d",
         disable_auto_compactions);
-    Header(log, "          Options.verify_checksums_in_compaction: %d",
-        verify_checksums_in_compaction);
 
     const auto& it_compaction_style =
         compaction_style_to_string.find(compaction_style);
@@ -335,8 +331,6 @@ void ColumnFamilyOptions::Dump(Logger* log) const {
     Header(log,
          "                Options.inplace_update_num_locks: %" ROCKSDB_PRIszt,
          inplace_update_num_locks);
-    Header(log, "              Options.min_partial_merge_operands: %u",
-        min_partial_merge_operands);
     // TODO: easier config for bloom (maybe based on avg key/value size)
     Header(log, "              Options.memtable_prefix_bloom_size_ratio: %f",
            memtable_prefix_bloom_size_ratio);

util/options_helper.cc

@@ -163,17 +163,12 @@ ColumnFamilyOptions BuildColumnFamilyOptions(
     cf_opts.max_bytes_for_level_multiplier_additional.emplace_back(value);
   }
 
-  cf_opts.verify_checksums_in_compaction =
-      mutable_cf_options.verify_checksums_in_compaction;
-
   // Misc options
   cf_opts.max_sequential_skip_in_iterations =
       mutable_cf_options.max_sequential_skip_in_iterations;
   cf_opts.paranoid_file_checks = mutable_cf_options.paranoid_file_checks;
   cf_opts.report_bg_io_stats = mutable_cf_options.report_bg_io_stats;
   cf_opts.compression = mutable_cf_options.compression;
-  cf_opts.min_partial_merge_operands =
-      mutable_cf_options.min_partial_merge_operands;
 
   cf_opts.table_factory = options.table_factory;
   // TODO(yhchiang): find some way to handle the following derived options

util/options_helper.h

@@ -411,9 +411,7 @@ static std::unordered_map<std::string, OptionTypeInfo> cf_options_type_info = {
      {offsetof(struct ColumnFamilyOptions, purge_redundant_kvs_while_flush),
       OptionType::kBoolean, OptionVerificationType::kNormal, false, 0}},
     {"verify_checksums_in_compaction",
-     {offsetof(struct ColumnFamilyOptions, verify_checksums_in_compaction),
-      OptionType::kBoolean, OptionVerificationType::kNormal, true,
-      offsetof(struct MutableCFOptions, verify_checksums_in_compaction)}},
+     {0, OptionType::kBoolean, OptionVerificationType::kDeprecated, true, 0}},
     {"soft_pending_compaction_bytes_limit",
      {offsetof(struct ColumnFamilyOptions, soft_pending_compaction_bytes_limit),
       OptionType::kUInt64T, OptionVerificationType::kNormal, true,
@@ -501,9 +499,7 @@ static std::unordered_map<std::string, OptionTypeInfo> cf_options_type_info = {
     {"memtable_prefix_bloom_probes",
      {0, OptionType::kUInt32T, OptionVerificationType::kDeprecated, true, 0}},
     {"min_partial_merge_operands",
-     {offsetof(struct ColumnFamilyOptions, min_partial_merge_operands),
-      OptionType::kUInt32T, OptionVerificationType::kNormal, true,
-      offsetof(struct MutableCFOptions, min_partial_merge_operands)}},
+     {0, OptionType::kUInt32T, OptionVerificationType::kDeprecated, true, 0}},
     {"max_bytes_for_level_base",
      {offsetof(struct ColumnFamilyOptions, max_bytes_for_level_base),
       OptionType::kUInt64T, OptionVerificationType::kNormal, true,

util/options_settable_test.cc

@@ -411,7 +411,6 @@ TEST_F(OptionsSettableTest, ColumnFamilyOptionsAllFieldsSettable) {
       "memtable_factory=SkipListFactory;"
       "compression=kNoCompression;"
       "bottommost_compression=kDisableCompressionOption;"
-      "min_partial_merge_operands=7576;"
       "level0_stop_writes_trigger=33;"
       "num_levels=99;"
       "level0_slowdown_writes_trigger=22;"
@@ -420,7 +419,6 @@ TEST_F(OptionsSettableTest, ColumnFamilyOptionsAllFieldsSettable) {
       "soft_rate_limit=530.615385;"
       "soft_pending_compaction_bytes_limit=0;"
       "max_write_buffer_number_to_maintain=84;"
-      "verify_checksums_in_compaction=false;"
       "merge_operator=aabcxehazrMergeOperator;"
       "memtable_prefix_bloom_size_ratio=0.4642;"
       "memtable_insert_with_hint_prefix_extractor=rocksdb.CappedPrefix.13;"

util/options_test.cc

@@ -174,7 +174,6 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
   ASSERT_EQ(new_cf_opt.arena_block_size, 22U);
   ASSERT_EQ(new_cf_opt.disable_auto_compactions, true);
   ASSERT_EQ(new_cf_opt.compaction_style, kCompactionStyleLevel);
-  ASSERT_EQ(new_cf_opt.verify_checksums_in_compaction, false);
   ASSERT_EQ(new_cf_opt.compaction_options_fifo.max_table_files_size,
             static_cast<uint64_t>(23));
   ASSERT_EQ(new_cf_opt.max_sequential_skip_in_iterations,
@@ -185,7 +184,6 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
   ASSERT_EQ(new_cf_opt.memtable_huge_page_size, 28U);
   ASSERT_EQ(new_cf_opt.bloom_locality, 29U);
   ASSERT_EQ(new_cf_opt.max_successive_merges, 30U);
-  ASSERT_EQ(new_cf_opt.min_partial_merge_operands, 31U);
   ASSERT_TRUE(new_cf_opt.prefix_extractor != nullptr);
   ASSERT_EQ(new_cf_opt.optimize_filters_for_hits, true);
   ASSERT_EQ(std::string(new_cf_opt.prefix_extractor->Name()),

util/testutil.cc

@@ -303,7 +303,6 @@ void RandomInitCFOptions(ColumnFamilyOptions* cf_opt, Random* rnd) {
   cf_opt->optimize_filters_for_hits = rnd->Uniform(2);
   cf_opt->paranoid_file_checks = rnd->Uniform(2);
   cf_opt->purge_redundant_kvs_while_flush = rnd->Uniform(2);
-  cf_opt->verify_checksums_in_compaction = rnd->Uniform(2);
   cf_opt->force_consistency_checks = rnd->Uniform(2);
 
   // double options
@@ -339,7 +338,6 @@ void RandomInitCFOptions(ColumnFamilyOptions* cf_opt, Random* rnd) {
 
   // uint32_t options
   cf_opt->bloom_locality = rnd->Uniform(10000);
-  cf_opt->min_partial_merge_operands = rnd->Uniform(10000);
   cf_opt->max_bytes_for_level_base = rnd->Uniform(10000);
 
   // uint64_t options