Remove unused fields from FileMetaData (temporarily) (#10443)

Summary:
FileMetaData::[min|max]_timestamp are not currently being used or
tracked by RocksDB, even when user-defined timestamp is enabled. Each of
them is a std::string which can occupy 32 bytes. Remove them for now.
They may be added back when we have a pressing need for them. When we do
add them back, consider store them in a more compact way, e.g. one
boolean flag and a byte array of size 16.

Per file min/max timestamp bounds are available as table properties.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10443

Test Plan: make check

Reviewed By: pdillinger

Differential Revision: D38292275

Pulled By: riversand963

fbshipit-source-id: 841dc4e855ad8f8481c80cb020603de9607c9c94

HISTORY.md

@@ -22,6 +22,7 @@
 ### Behavior Change
 * Added checksum handshake during the copying of decompressed WAL fragment. This together with #9875, #10037, #10212, #10114 and #10319 provides end-to-end integrity protection for write batch during recovery.
 * PosixLogger is removed and by default EnvLogger will be used for info logging. The behavior of the two loggers should be very similar when using the default Posix Env.
+* Remove [min|max]_timestamp from VersionEdit for now since they are not tracked in MANIFEST anyway but consume two empty std::string (up to 64 bytes) for each file. Should they be added back in the future, we should store them more compactly.
 
 ## 7.5.0 (07/15/2022)
 ### New Features

db/compaction/compaction_job_test.cc

@@ -372,8 +372,7 @@ class CompactionJobTestBase : public testing::Test {
                  smallest_seqno, largest_seqno, false, Temperature::kUnknown,
                  oldest_blob_file_number, kUnknownOldestAncesterTime,
                  kUnknownFileCreationTime, kUnknownFileChecksum,
-                 kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-                 kDisableUserTimestamp, kNullUniqueId64x2);
+                 kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
     mutex_.Lock();
     EXPECT_OK(

db/compaction/compaction_picker_test.cc

@@ -116,8 +116,7 @@ class CompactionPickerTest : public testing::Test {
         InternalKey(largest, largest_seq, kTypeValue), smallest_seq,
         largest_seq, marked_for_compact, temperature, kInvalidBlobFileNumber,
         kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-        kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-        kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     f->compensated_file_size =
         (compensated_file_size != 0) ? compensated_file_size : file_size;
     f->oldest_ancester_time = oldest_ancestor_time;

db/db_impl/db_impl_compaction_flush.cc

@@ -1686,8 +1686,7 @@ Status DBImpl::ReFitLevel(ColumnFamilyData* cfd, int level, int target_level) {
           f->smallest, f->largest, f->fd.smallest_seqno, f->fd.largest_seqno,
           f->marked_for_compaction, f->temperature, f->oldest_blob_file_number,
           f->oldest_ancester_time, f->file_creation_time, f->file_checksum,
-          f->file_checksum_func_name, f->min_timestamp, f->max_timestamp,
-          f->unique_id);
+          f->file_checksum_func_name, f->unique_id);
     }
     ROCKS_LOG_DEBUG(immutable_db_options_.info_log,
                     "[%s] Apply version edit:\n%s", cfd->GetName().c_str(),
@@ -3313,7 +3312,7 @@ Status DBImpl::BackgroundCompaction(bool* made_progress,
             f->fd.largest_seqno, f->marked_for_compaction, f->temperature,
             f->oldest_blob_file_number, f->oldest_ancester_time,
             f->file_creation_time, f->file_checksum, f->file_checksum_func_name,
-            f->min_timestamp, f->max_timestamp, f->unique_id);
+            f->unique_id);
 
         ROCKS_LOG_BUFFER(
             log_buffer,

db/db_impl/db_impl_experimental.cc

@@ -131,13 +131,13 @@ Status DBImpl::PromoteL0(ColumnFamilyHandle* column_family, int target_level) {
     edit.SetColumnFamily(cfd->GetID());
     for (const auto& f : l0_files) {
       edit.DeleteFile(0, f->fd.GetNumber());
-      edit.AddFile(
-          target_level, f->fd.GetNumber(), f->fd.GetPathId(),
-          f->fd.GetFileSize(), f->smallest, f->largest, f->fd.smallest_seqno,
-          f->fd.largest_seqno, f->marked_for_compaction, f->temperature,
-          f->oldest_blob_file_number, f->oldest_ancester_time,
-          f->file_creation_time, f->file_checksum, f->file_checksum_func_name,
-          f->min_timestamp, f->max_timestamp, f->unique_id);
+      edit.AddFile(target_level, f->fd.GetNumber(), f->fd.GetPathId(),
+                   f->fd.GetFileSize(), f->smallest, f->largest,
+                   f->fd.smallest_seqno, f->fd.largest_seqno,
+                   f->marked_for_compaction, f->temperature,
+                   f->oldest_blob_file_number, f->oldest_ancester_time,
+                   f->file_creation_time, f->file_checksum,
+                   f->file_checksum_func_name, f->unique_id);
     }
 
     status = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),

db/db_impl/db_impl_open.cc

@@ -1600,8 +1600,7 @@ Status DBImpl::WriteLevel0TableForRecovery(int job_id, ColumnFamilyData* cfd,
                   meta.marked_for_compaction, meta.temperature,
                   meta.oldest_blob_file_number, meta.oldest_ancester_time,
                   meta.file_creation_time, meta.file_checksum,
-                  meta.file_checksum_func_name, meta.min_timestamp,
-                  meta.max_timestamp, meta.unique_id);
+                  meta.file_checksum_func_name, meta.unique_id);
 
     for (const auto& blob : blob_file_additions) {
       edit->AddBlobFile(blob);

db/experimental.cc

@@ -105,14 +105,13 @@ Status UpdateManifestForFilesState(
               // Current state inconsistent with manifest
               ++files_updated;
               edit.DeleteFile(level, number);
-              edit.AddFile(level, number, lf->fd.GetPathId(),
-                           lf->fd.GetFileSize(), lf->smallest, lf->largest,
-                           lf->fd.smallest_seqno, lf->fd.largest_seqno,
-                           lf->marked_for_compaction, temp,
-                           lf->oldest_blob_file_number,
-                           lf->oldest_ancester_time, lf->file_creation_time,
-                           lf->file_checksum, lf->file_checksum_func_name,
-                           lf->min_timestamp, lf->max_timestamp, lf->unique_id);
+              edit.AddFile(
+                  level, number, lf->fd.GetPathId(), lf->fd.GetFileSize(),
+                  lf->smallest, lf->largest, lf->fd.smallest_seqno,
+                  lf->fd.largest_seqno, lf->marked_for_compaction, temp,
+                  lf->oldest_blob_file_number, lf->oldest_ancester_time,
+                  lf->file_creation_time, lf->file_checksum,
+                  lf->file_checksum_func_name, lf->unique_id);
             }
           }
         } else {

db/external_sst_file_ingestion_job.cc

@@ -450,8 +450,7 @@ Status ExternalSstFileIngestionJob::Run() {
         f.smallest_internal_key, f.largest_internal_key, f.assigned_seqno,
         f.assigned_seqno, false, f.file_temperature, kInvalidBlobFileNumber,
         oldest_ancester_time, current_time, f.file_checksum,
-        f.file_checksum_func_name, kDisableUserTimestamp, kDisableUserTimestamp,
-        f.unique_id);
+        f.file_checksum_func_name, f.unique_id);
     f_metadata.temperature = f.file_temperature;
     edit_.AddFile(f.picked_level, f_metadata);
   }

db/flush_job.cc

@@ -1000,8 +1000,7 @@ Status FlushJob::WriteLevel0Table() {
                    meta_.marked_for_compaction, meta_.temperature,
                    meta_.oldest_blob_file_number, meta_.oldest_ancester_time,
                    meta_.file_creation_time, meta_.file_checksum,
-                   meta_.file_checksum_func_name, meta_.min_timestamp,
-                   meta_.max_timestamp, meta_.unique_id);
+                   meta_.file_checksum_func_name, meta_.unique_id);
 
     edit_->SetBlobFileAdditions(std::move(blob_file_additions));
   }

db/import_column_family_job.cc

@@ -160,7 +160,7 @@ Status ImportColumnFamilyJob::Run() {
                   file_metadata.largest_seqno, false, file_metadata.temperature,
                   kInvalidBlobFileNumber, oldest_ancester_time, current_time,
                   kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-                  kDisableUserTimestamp, kDisableUserTimestamp, f.unique_id);
+                  f.unique_id);
 
     // If incoming sequence number is higher, update local sequence number.
     if (file_metadata.largest_seqno > versions_->LastSequence()) {

db/repair.cc

@@ -651,7 +651,6 @@ class Repairer {
             table->meta.temperature, table->meta.oldest_blob_file_number,
             table->meta.oldest_ancester_time, table->meta.file_creation_time,
             table->meta.file_checksum, table->meta.file_checksum_func_name,
-            table->meta.min_timestamp, table->meta.max_timestamp,
             table->meta.unique_id);
       }
       assert(next_file_number_ > 0);

db/version_builder_test.cc

@@ -72,8 +72,7 @@ class VersionBuilderTest : public testing::Test {
         /* marked_for_compact */ false, Temperature::kUnknown,
         oldest_blob_file_number, kUnknownOldestAncesterTime,
         kUnknownFileCreationTime, kUnknownFileChecksum,
-        kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-        kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     f->compensated_file_size = file_size;
     f->num_entries = num_entries;
     f->num_deletions = num_deletions;
@@ -134,8 +133,7 @@ class VersionBuilderTest : public testing::Test {
         GetInternalKey(largest), smallest_seqno, largest_seqno,
         marked_for_compaction, Temperature::kUnknown, blob_file_number,
         kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-        kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-        kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   }
 
   void UpdateVersionStorageInfo(VersionStorageInfo* vstorage) {
@@ -180,8 +178,7 @@ TEST_F(VersionBuilderTest, ApplyAndSaveTo) {
       2, 666, 0, 100U, GetInternalKey("301"), GetInternalKey("350"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.DeleteFile(3, 27U);
 
   EnvOptions env_options;
@@ -224,8 +221,7 @@ TEST_F(VersionBuilderTest, ApplyAndSaveToDynamic) {
       3, 666, 0, 100U, GetInternalKey("301"), GetInternalKey("350"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.DeleteFile(0, 1U);
   version_edit.DeleteFile(0, 88U);
 
@@ -271,8 +267,7 @@ TEST_F(VersionBuilderTest, ApplyAndSaveToDynamic2) {
       4, 666, 0, 100U, GetInternalKey("301"), GetInternalKey("350"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.DeleteFile(0, 1U);
   version_edit.DeleteFile(0, 88U);
   version_edit.DeleteFile(4, 6U);
@@ -308,32 +303,27 @@ TEST_F(VersionBuilderTest, ApplyMultipleAndSaveTo) {
       2, 666, 0, 100U, GetInternalKey("301"), GetInternalKey("350"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 676, 0, 100U, GetInternalKey("401"), GetInternalKey("450"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 636, 0, 100U, GetInternalKey("601"), GetInternalKey("650"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 616, 0, 100U, GetInternalKey("501"), GetInternalKey("550"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 606, 0, 100U, GetInternalKey("701"), GetInternalKey("750"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   EnvOptions env_options;
   constexpr TableCache* table_cache = nullptr;
@@ -372,32 +362,27 @@ TEST_F(VersionBuilderTest, ApplyDeleteAndSaveTo) {
       2, 666, 0, 100U, GetInternalKey("301"), GetInternalKey("350"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 676, 0, 100U, GetInternalKey("401"), GetInternalKey("450"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 636, 0, 100U, GetInternalKey("601"), GetInternalKey("650"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 616, 0, 100U, GetInternalKey("501"), GetInternalKey("550"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit.AddFile(
       2, 606, 0, 100U, GetInternalKey("701"), GetInternalKey("750"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   ASSERT_OK(version_builder.Apply(&version_edit));
 
   VersionEdit version_edit2;
@@ -405,16 +390,14 @@ TEST_F(VersionBuilderTest, ApplyDeleteAndSaveTo) {
       2, 808, 0, 100U, GetInternalKey("901"), GetInternalKey("950"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   version_edit2.DeleteFile(2, 616);
   version_edit2.DeleteFile(2, 636);
   version_edit.AddFile(
       2, 806, 0, 100U, GetInternalKey("801"), GetInternalKey("850"), 200, 200,
       false, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   ASSERT_OK(version_builder.Apply(&version_edit2));
   ASSERT_OK(version_builder.SaveTo(&new_vstorage));
@@ -525,8 +508,7 @@ TEST_F(VersionBuilderTest, ApplyFileDeletionAndAddition) {
                    largest_seqno, marked_for_compaction, Temperature::kUnknown,
                    kInvalidBlobFileNumber, kUnknownOldestAncesterTime,
                    kUnknownFileCreationTime, kUnknownFileChecksum,
-                   kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-                   kDisableUserTimestamp, kNullUniqueId64x2);
+                   kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   ASSERT_OK(builder.Apply(&addition));
 
@@ -570,13 +552,12 @@ TEST_F(VersionBuilderTest, ApplyFileAdditionAlreadyInBase) {
   constexpr SequenceNumber largest_seqno = 1000;
   constexpr bool marked_for_compaction = false;
 
-  edit.AddFile(new_level, file_number, path_id, file_size,
-               GetInternalKey(smallest), GetInternalKey(largest),
-               smallest_seqno, largest_seqno, marked_for_compaction,
-               Temperature::kUnknown, kInvalidBlobFileNumber,
-               kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-               kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+  edit.AddFile(
+      new_level, file_number, path_id, file_size, GetInternalKey(smallest),
+      GetInternalKey(largest), smallest_seqno, largest_seqno,
+      marked_for_compaction, Temperature::kUnknown, kInvalidBlobFileNumber,
+      kUnknownOldestAncesterTime, kUnknownFileCreationTime,
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   const Status s = builder.Apply(&edit);
   ASSERT_TRUE(s.IsCorruption());
@@ -612,8 +593,7 @@ TEST_F(VersionBuilderTest, ApplyFileAdditionAlreadyApplied) {
                marked_for_compaction, Temperature::kUnknown,
                kInvalidBlobFileNumber, kUnknownOldestAncesterTime,
                kUnknownFileCreationTime, kUnknownFileChecksum,
-               kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   ASSERT_OK(builder.Apply(&edit));
 
@@ -626,8 +606,7 @@ TEST_F(VersionBuilderTest, ApplyFileAdditionAlreadyApplied) {
       GetInternalKey(largest), smallest_seqno, largest_seqno,
       marked_for_compaction, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   const Status s = builder.Apply(&other_edit);
   ASSERT_TRUE(s.IsCorruption());
@@ -663,8 +642,7 @@ TEST_F(VersionBuilderTest, ApplyFileAdditionAndDeletion) {
       GetInternalKey(largest), smallest_seqno, largest_seqno,
       marked_for_compaction, Temperature::kUnknown, kInvalidBlobFileNumber,
       kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   ASSERT_OK(builder.Apply(&addition));
 
@@ -1233,8 +1211,7 @@ TEST_F(VersionBuilderTest, SaveBlobFilesToConcurrentJobs) {
                smallest_seqno, largest_seqno, marked_for_compaction,
                Temperature::kUnknown, blob_file_number,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               checksum_value, checksum_method, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               checksum_value, checksum_method, kNullUniqueId64x2);
   edit.AddBlobFile(blob_file_number, total_blob_count, total_blob_bytes,
                    checksum_method, checksum_value);
 
@@ -1321,8 +1298,7 @@ TEST_F(VersionBuilderTest, CheckConsistencyForBlobFiles) {
                Temperature::kUnknown,
                /* oldest_blob_file_number */ 16, kUnknownOldestAncesterTime,
                kUnknownFileCreationTime, kUnknownFileChecksum,
-               kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   edit.AddFile(/* level */ 1, /* file_number */ 700, /* path_id */ 0,
                /* file_size */ 100, /* smallest */ GetInternalKey("801"),
@@ -1331,8 +1307,7 @@ TEST_F(VersionBuilderTest, CheckConsistencyForBlobFiles) {
                Temperature::kUnknown,
                /* oldest_blob_file_number */ 1000, kUnknownOldestAncesterTime,
                kUnknownFileCreationTime, kUnknownFileChecksum,
-               kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
   edit.AddBlobFile(/* blob_file_number */ 1000, /* total_blob_count */ 2000,
                    /* total_blob_bytes */ 200000,
                    /* checksum_method */ std::string(),
@@ -1553,8 +1528,7 @@ TEST_F(VersionBuilderTest, MaintainLinkedSstsForBlobFiles) {
       Temperature::kUnknown,
       /* oldest_blob_file_number */ 1, kUnknownOldestAncesterTime,
       kUnknownFileCreationTime, kUnknownFileChecksum,
-      kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   // Add an SST that does not reference any blob files.
   edit.AddFile(
@@ -1564,8 +1538,7 @@ TEST_F(VersionBuilderTest, MaintainLinkedSstsForBlobFiles) {
       /* largest_seqno */ 2200, /* marked_for_compaction */ false,
       Temperature::kUnknown, kInvalidBlobFileNumber, kUnknownOldestAncesterTime,
       kUnknownFileCreationTime, kUnknownFileChecksum,
-      kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-      kDisableUserTimestamp, kNullUniqueId64x2);
+      kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   // Delete a file that references a blob file.
   edit.DeleteFile(/* level */ 1, /* file_number */ 6);
@@ -1587,8 +1560,7 @@ TEST_F(VersionBuilderTest, MaintainLinkedSstsForBlobFiles) {
                Temperature::kUnknown,
                /* oldest_blob_file_number */ 3, kUnknownOldestAncesterTime,
                kUnknownFileCreationTime, kUnknownFileChecksum,
-               kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   // Trivially move a file that does not reference any blob files.
   edit.DeleteFile(/* level */ 1, /* file_number */ 13);
@@ -1600,7 +1572,7 @@ TEST_F(VersionBuilderTest, MaintainLinkedSstsForBlobFiles) {
                Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
                kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-               kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+               kNullUniqueId64x2);
 
   // Add one more SST file that references a blob file, then promptly
   // delete it in a second version edit before the new version gets saved.
@@ -1613,8 +1585,7 @@ TEST_F(VersionBuilderTest, MaintainLinkedSstsForBlobFiles) {
                Temperature::kUnknown,
                /* oldest_blob_file_number */ 5, kUnknownOldestAncesterTime,
                kUnknownFileCreationTime, kUnknownFileChecksum,
-               kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
 
   VersionEdit edit2;
 

db/version_edit.cc

@@ -192,16 +192,6 @@ bool VersionEdit::EncodeTo(std::string* dst) const {
     PutVarint32(dst, NewFileCustomTag::kFileChecksumFuncName);
     PutLengthPrefixedSlice(dst, Slice(f.file_checksum_func_name));
 
-    if (f.max_timestamp != kDisableUserTimestamp) {
-      if (f.min_timestamp.size() != f.max_timestamp.size()) {
-        assert(false);
-        return false;
-      }
-      PutVarint32(dst, NewFileCustomTag::kMinTimestamp);
-      PutLengthPrefixedSlice(dst, Slice(f.min_timestamp));
-      PutVarint32(dst, NewFileCustomTag::kMaxTimestamp);
-      PutLengthPrefixedSlice(dst, Slice(f.max_timestamp));
-    }
     if (f.fd.GetPathId() != 0) {
       PutVarint32(dst, NewFileCustomTag::kPathId);
       char p = static_cast<char>(f.fd.GetPathId());
@@ -339,10 +329,6 @@ const char* VersionEdit::DecodeNewFile4From(Slice* input) {
         return "new-file4 custom field";
       }
       if (custom_tag == kTerminate) {
-        if (f.min_timestamp.size() != f.max_timestamp.size()) {
-          assert(false);
-          return "new-file4 custom field timestamp size mismatch error";
-        }
         break;
       }
       if (!GetLengthPrefixedSlice(input, &field)) {
@@ -403,12 +389,6 @@ const char* VersionEdit::DecodeNewFile4From(Slice* input) {
             }
           }
           break;
-        case kMinTimestamp:
-          f.min_timestamp = field.ToString();
-          break;
-        case kMaxTimestamp:
-          f.max_timestamp = field.ToString();
-          break;
         case kUniqueId:
           if (!DecodeUniqueIdBytes(field.ToString(), &f.unique_id).ok()) {
             f.unique_id = kNullUniqueId64x2;
@@ -827,13 +807,6 @@ std::string VersionEdit::DebugString(bool hex_key) const {
       r.append(" blob_file:");
       AppendNumberTo(&r, f.oldest_blob_file_number);
     }
-    if (f.min_timestamp != kDisableUserTimestamp) {
-      assert(f.max_timestamp != kDisableUserTimestamp);
-      r.append(" min_timestamp:");
-      r.append(Slice(f.min_timestamp).ToString(true));
-      r.append(" max_timestamp:");
-      r.append(Slice(f.max_timestamp).ToString(true));
-    }
     r.append(" oldest_ancester_time:");
     AppendNumberTo(&r, f.oldest_ancester_time);
     r.append(" file_creation_time:");
@@ -955,11 +928,6 @@ std::string VersionEdit::DebugJSON(int edit_num, bool hex_key) const {
       jw << "FileSize" << f.fd.GetFileSize();
       jw << "SmallestIKey" << f.smallest.DebugString(hex_key);
       jw << "LargestIKey" << f.largest.DebugString(hex_key);
-      if (f.min_timestamp != kDisableUserTimestamp) {
-        assert(f.max_timestamp != kDisableUserTimestamp);
-        jw << "MinTimestamp" << Slice(f.min_timestamp).ToString(true);
-        jw << "MaxTimestamp" << Slice(f.max_timestamp).ToString(true);
-      }
       jw << "OldestAncesterTime" << f.oldest_ancester_time;
       jw << "FileCreationTime" << f.file_creation_time;
       jw << "FileChecksum" << Slice(f.file_checksum).ToString(true);

db/version_edit.h

@@ -216,10 +216,6 @@ struct FileMetaData {
 
   // File checksum function name
   std::string file_checksum_func_name = kUnknownFileChecksumFuncName;
-  // Min (oldest) timestamp of keys in this file
-  std::string min_timestamp;
-  // Max (newest) timestamp of keys in this file
-  std::string max_timestamp;
 
   // SST unique id
   UniqueId64x2 unique_id{};
@@ -234,7 +230,6 @@ struct FileMetaData {
                uint64_t _oldest_ancester_time, uint64_t _file_creation_time,
                const std::string& _file_checksum,
                const std::string& _file_checksum_func_name,
-               std::string _min_timestamp, std::string _max_timestamp,
                UniqueId64x2 _unique_id)
       : fd(file, file_path_id, file_size, smallest_seq, largest_seq),
         smallest(smallest_key),
@@ -246,8 +241,6 @@ struct FileMetaData {
         file_creation_time(_file_creation_time),
         file_checksum(_file_checksum),
         file_checksum_func_name(_file_checksum_func_name),
-        min_timestamp(std::move(_min_timestamp)),
-        max_timestamp(std::move(_max_timestamp)),
         unique_id(std::move(_unique_id)) {
     TEST_SYNC_POINT_CALLBACK("FileMetaData::FileMetaData", this);
   }
@@ -309,8 +302,7 @@ struct FileMetaData {
     usage += sizeof(*this);
 #endif  // ROCKSDB_MALLOC_USABLE_SIZE
     usage += smallest.size() + largest.size() + file_checksum.size() +
-             file_checksum_func_name.size() + min_timestamp.size() +
-             max_timestamp.size();
+             file_checksum_func_name.size();
     return usage;
   }
 };
@@ -435,8 +427,6 @@ class VersionEdit {
                uint64_t oldest_ancester_time, uint64_t file_creation_time,
                const std::string& file_checksum,
                const std::string& file_checksum_func_name,
-               const std::string& min_timestamp,
-               const std::string& max_timestamp,
                const UniqueId64x2& unique_id) {
     assert(smallest_seqno <= largest_seqno);
     new_files_.emplace_back(
@@ -445,7 +435,7 @@ class VersionEdit {
                      smallest_seqno, largest_seqno, marked_for_compaction,
                      temperature, oldest_blob_file_number, oldest_ancester_time,
                      file_creation_time, file_checksum, file_checksum_func_name,
-                     min_timestamp, max_timestamp, unique_id));
+                     unique_id));
     if (!HasLastSequence() || largest_seqno > GetLastSequence()) {
       SetLastSequence(largest_seqno);
     }

db/version_edit_test.cc

@@ -43,8 +43,8 @@ TEST_F(VersionEditTest, EncodeDecode) {
                  InternalKey("foo", kBig + 500 + i, kTypeValue),
                  InternalKey("zoo", kBig + 600 + i, kTypeDeletion),
                  kBig + 500 + i, kBig + 600 + i, false, Temperature::kUnknown,
-                 kInvalidBlobFileNumber, 888, 678, "234", "crc32c", "123",
-                 "345", kNullUniqueId64x2);
+                 kInvalidBlobFileNumber, 888, 678, "234", "crc32c",
+                 kNullUniqueId64x2);
     edit.DeleteFile(4, kBig + 700 + i);
   }
 
@@ -63,24 +63,24 @@ TEST_F(VersionEditTest, EncodeDecodeNewFile4) {
                InternalKey("zoo", kBig + 600, kTypeDeletion), kBig + 500,
                kBig + 600, true, Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               kUnknownFileChecksum, kUnknownFileChecksumFuncName, "123", "234",
+               kUnknownFileChecksum, kUnknownFileChecksumFuncName,
                kNullUniqueId64x2);
   edit.AddFile(4, 301, 3, 100, InternalKey("foo", kBig + 501, kTypeValue),
                InternalKey("zoo", kBig + 601, kTypeDeletion), kBig + 501,
                kBig + 601, false, Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               kUnknownFileChecksum, kUnknownFileChecksumFuncName, "345", "543",
+               kUnknownFileChecksum, kUnknownFileChecksumFuncName,
                kNullUniqueId64x2);
   edit.AddFile(5, 302, 0, 100, InternalKey("foo", kBig + 502, kTypeValue),
                InternalKey("zoo", kBig + 602, kTypeDeletion), kBig + 502,
                kBig + 602, true, Temperature::kUnknown, kInvalidBlobFileNumber,
                666, 888, kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-               "456", "567", kNullUniqueId64x2);
+               kNullUniqueId64x2);
   edit.AddFile(5, 303, 0, 100, InternalKey("foo", kBig + 503, kTypeBlobIndex),
                InternalKey("zoo", kBig + 603, kTypeBlobIndex), kBig + 503,
                kBig + 603, true, Temperature::kUnknown, 1001,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               kUnknownFileChecksum, kUnknownFileChecksumFuncName, "678", "789",
+               kUnknownFileChecksum, kUnknownFileChecksumFuncName,
                kNullUniqueId64x2);
 
   edit.DeleteFile(4, 700);
@@ -112,14 +112,6 @@ TEST_F(VersionEditTest, EncodeDecodeNewFile4) {
   ASSERT_EQ(kInvalidBlobFileNumber,
             new_files[2].second.oldest_blob_file_number);
   ASSERT_EQ(1001, new_files[3].second.oldest_blob_file_number);
-  ASSERT_EQ("123", new_files[0].second.min_timestamp);
-  ASSERT_EQ("234", new_files[0].second.max_timestamp);
-  ASSERT_EQ("345", new_files[1].second.min_timestamp);
-  ASSERT_EQ("543", new_files[1].second.max_timestamp);
-  ASSERT_EQ("456", new_files[2].second.min_timestamp);
-  ASSERT_EQ("567", new_files[2].second.max_timestamp);
-  ASSERT_EQ("678", new_files[3].second.min_timestamp);
-  ASSERT_EQ("789", new_files[3].second.max_timestamp);
 }
 
 TEST_F(VersionEditTest, ForwardCompatibleNewFile4) {
@@ -129,13 +121,12 @@ TEST_F(VersionEditTest, ForwardCompatibleNewFile4) {
                InternalKey("zoo", kBig + 600, kTypeDeletion), kBig + 500,
                kBig + 600, true, Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-               kUnknownFileChecksum, kUnknownFileChecksumFuncName, "123", "234",
+               kUnknownFileChecksum, kUnknownFileChecksumFuncName,
                kNullUniqueId64x2);
   edit.AddFile(4, 301, 3, 100, InternalKey("foo", kBig + 501, kTypeValue),
                InternalKey("zoo", kBig + 601, kTypeDeletion), kBig + 501,
                kBig + 601, false, Temperature::kUnknown, kInvalidBlobFileNumber,
-               686, 868, "234", "crc32c", kDisableUserTimestamp,
-               kDisableUserTimestamp, kNullUniqueId64x2);
+               686, 868, "234", "crc32c", kNullUniqueId64x2);
   edit.DeleteFile(4, 700);
 
   edit.SetComparatorName("foo");
@@ -174,10 +165,6 @@ TEST_F(VersionEditTest, ForwardCompatibleNewFile4) {
   ASSERT_EQ(3u, new_files[0].second.fd.GetPathId());
   ASSERT_EQ(3u, new_files[1].second.fd.GetPathId());
   ASSERT_EQ(1u, parsed.GetDeletedFiles().size());
-  ASSERT_EQ("123", new_files[0].second.min_timestamp);
-  ASSERT_EQ("234", new_files[0].second.max_timestamp);
-  ASSERT_EQ(kDisableUserTimestamp, new_files[1].second.min_timestamp);
-  ASSERT_EQ(kDisableUserTimestamp, new_files[1].second.max_timestamp);
 }
 
 TEST_F(VersionEditTest, NewFile4NotSupportedField) {
@@ -188,7 +175,7 @@ TEST_F(VersionEditTest, NewFile4NotSupportedField) {
                kBig + 600, true, Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
                kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-               kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+               kNullUniqueId64x2);
 
   edit.SetComparatorName("foo");
   edit.SetLogNumber(kBig + 100);
@@ -219,7 +206,7 @@ TEST_F(VersionEditTest, EncodeEmptyFile) {
                Temperature::kUnknown, kInvalidBlobFileNumber,
                kUnknownOldestAncesterTime, kUnknownFileCreationTime,
                kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-               kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+               kNullUniqueId64x2);
   std::string buffer;
   ASSERT_TRUE(!edit.EncodeTo(&buffer));
 }

db/version_set.cc

@@ -5550,8 +5550,7 @@ Status VersionSet::WriteCurrentStateToManifest(
                        f->marked_for_compaction, f->temperature,
                        f->oldest_blob_file_number, f->oldest_ancester_time,
                        f->file_creation_time, f->file_checksum,
-                       f->file_checksum_func_name, f->min_timestamp,
-                       f->max_timestamp, f->unique_id);
+                       f->file_checksum_func_name, f->unique_id);
         }
       }
 

db/version_set_test.cc

@@ -50,8 +50,7 @@ class GenerateLevelFilesBriefTest : public testing::Test {
         largest_seq, /* marked_for_compact */ false, Temperature::kUnknown,
         kInvalidBlobFileNumber, kUnknownOldestAncesterTime,
         kUnknownFileCreationTime, kUnknownFileChecksum,
-        kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-        kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     files_.push_back(f);
   }
 
@@ -159,8 +158,7 @@ class VersionStorageInfoTestBase : public testing::Test {
         /* largest_seq */ 0, /* marked_for_compact */ false,
         Temperature::kUnknown, oldest_blob_file_number,
         kUnknownOldestAncesterTime, kUnknownFileCreationTime,
-        kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-        kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     f->compensated_file_size = file_size;
     vstorage_.AddFile(level, f);
   }
@@ -3233,11 +3231,10 @@ class VersionSetTestMissingFiles : public VersionSetTestBase,
       s = fs_->GetFileSize(fname, IOOptions(), &file_size, nullptr);
       ASSERT_OK(s);
       ASSERT_NE(0, file_size);
-      file_metas->emplace_back(
-          file_num, /*file_path_id=*/0, file_size, ikey, ikey, 0, 0, false,
-          Temperature::kUnknown, 0, 0, 0, kUnknownFileChecksum,
-          kUnknownFileChecksumFuncName, kDisableUserTimestamp,
-          kDisableUserTimestamp, kNullUniqueId64x2);
+      file_metas->emplace_back(file_num, /*file_path_id=*/0, file_size, ikey,
+                               ikey, 0, 0, false, Temperature::kUnknown, 0, 0,
+                               0, kUnknownFileChecksum,
+                               kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     }
   }
 
@@ -3292,8 +3289,7 @@ TEST_F(VersionSetTestMissingFiles, ManifestFarBehindSst) {
     FileMetaData meta = FileMetaData(
         file_num, /*file_path_id=*/0, /*file_size=*/12, smallest_ikey,
         largest_ikey, 0, 0, false, Temperature::kUnknown, 0, 0, 0,
-        kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-        kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     added_files.emplace_back(0, meta);
   }
   WriteFileAdditionAndDeletionToManifest(
@@ -3348,8 +3344,7 @@ TEST_F(VersionSetTestMissingFiles, ManifestAheadofSst) {
     FileMetaData meta = FileMetaData(
         file_num, /*file_path_id=*/0, /*file_size=*/12, smallest_ikey,
         largest_ikey, 0, 0, false, Temperature::kUnknown, 0, 0, 0,
-        kUnknownFileChecksum, kUnknownFileChecksumFuncName,
-        kDisableUserTimestamp, kDisableUserTimestamp, kNullUniqueId64x2);
+        kUnknownFileChecksum, kUnknownFileChecksumFuncName, kNullUniqueId64x2);
     added_files.emplace_back(0, meta);
   }
   WriteFileAdditionAndDeletionToManifest(