Fix build errors related to util/status.cc

Summary:
This is related to the upgrade to gcc7. The code change itself
is lifted from the following commits:

https://github.com/facebook/rocksdb/commit/78ab11cd7154c683f9a44d3524ee9c7acea4ade6
https://github.com/facebook/rocksdb/commit/7bee48bdbd8582c84dba8ce8e7273c9b9b367d7c

HISTORY.md

@@ -1,5 +1,20 @@
 # Rocksdb Change Log
-## Unreleased
+
+## 5.14.3 (8/21/2018)
+### Public API Change
+* The merge operands are passed to `MergeOperator::ShouldMerge` in the reversed order relative to how they were merged (passed to FullMerge or FullMergeV2) for performance reasons
+### Bug Fixes
+* Fixes DBImpl::FindObsoleteFiles() calling GetChildren() on the same path
+
+## 5.14.2 (7/3/2018)
+### Bug Fixes
+* Change default value of `bytes_max_delete_chunk` to 0 in NewSstFileManager() as it doesn't work well with checkpoints.
+* Set DEBUG_LEVEL=0 for RocksJava Mac Release build.
+
+## 5.14.1 (6/20/2018)
+### Bug Fixes
+* Fix block-based table reader pinning blocks throughout its lifetime, causing memory usage increase.
+* Fix bug with prefix search in partition filters where a shared prefix would be ignored from the later partitions. The bug could report an eixstent key as missing. The bug could be triggered if prefix_extractor is set and partition filters is enabled.
 
 ## 5.14.0 (5/16/2018)
 ### Public API Change
@@ -26,6 +41,7 @@
 * Fix `BackupableDBOptions::max_valid_backups_to_open` to not delete backup files when refcount cannot be accurately determined.
 * Fix memory leak when pin_l0_filter_and_index_blocks_in_cache is used with partitioned filters
 * Disable rollback of merge operands in WritePrepared transactions to work around an issue in MyRocks. It can be enabled back by setting TransactionDBOptions::rollback_merge_operands to true.
+* Fix bug with prefix search in partition filters where a shared prefix would be ignored from the later partitions. The bug could report an eixstent key as missing. The bug could be triggered if prefix_extractor is set and partition filters is enabled.
 
 ### Java API Changes
 * Add `BlockBasedTableConfig.setBlockCache` to allow sharing a block cache across DB instances.

Makefile

@@ -85,6 +85,10 @@ ifeq ($(MAKECMDGOALS),rocksdbjavastaticrelease)
 	DEBUG_LEVEL=0
 endif
 
+ifeq ($(MAKECMDGOALS),rocksdbjavastaticreleasedocker)
+        DEBUG_LEVEL=0
+endif
+
 ifeq ($(MAKECMDGOALS),rocksdbjavastaticpublish)
 	DEBUG_LEVEL=0
 endif
@@ -1583,7 +1587,7 @@ ZLIB_SHA256 ?= c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
 ZLIB_DOWNLOAD_BASE ?= http://zlib.net
 BZIP2_VER ?= 1.0.6
 BZIP2_SHA256 ?= a2848f34fcd5d6cf47def00461fcb528a0484d8edef8208d6d2e2909dc61d9cd
-BZIP2_DOWNLOAD_BASE ?= http://www.bzip.org
+BZIP2_DOWNLOAD_BASE ?= https://web.archive.org/web/20180624184835/http://www.bzip.org
 SNAPPY_VER ?= 1.1.4
 SNAPPY_SHA256 ?= 134bfe122fd25599bb807bb8130e7ba6d9bdb851e0b16efcb83ac4f5d0b70057
 SNAPPY_DOWNLOAD_BASE ?= https://github.com/google/snappy/releases/download

TARGETS

@@ -28,7 +28,7 @@ rocksdb_compiler_flags = [
     # Added missing flags from output of build_detect_platform
     "-DROCKSDB_PTHREAD_ADAPTIVE_MUTEX",
     "-DROCKSDB_BACKTRACE",
-    "-Wshorten-64-to-32",
+    "-Wnarrowing",
 ]
 
 rocksdb_external_deps = [
@@ -556,13 +556,13 @@ ROCKS_TESTS = [
         "serial",
     ],
     [
-        "db_iter_test",
-        "db/db_iter_test.cc",
+        "db_iter_stress_test",
+        "db/db_iter_stress_test.cc",
         "serial",
     ],
     [
-        "db_iter_stress_test",
-        "db/db_iter_stress_test.cc",
+        "db_iter_test",
+        "db/db_iter_test.cc",
         "serial",
     ],
     [
@@ -1069,14 +1069,3 @@ if not is_opt_mode:
           command = [TEST_RUNNER, BUCK_BINS + test_bin]
         )
 
-custom_unittest(
-    name = "make_rocksdbjavastatic",
-    command = ["internal_repo_rocksdb/make_rocksdbjavastatic.sh"],
-    type = "simple",
-)
-
-custom_unittest(
-    name = "make_rocksdb_lite_release",
-    command = ["internal_repo_rocksdb/make_rocksdb_lite_release.sh"],
-    type = "simple",
-)

buckifier/targets_cfg.py

@@ -32,7 +32,7 @@ rocksdb_compiler_flags = [
     # Added missing flags from output of build_detect_platform
     "-DROCKSDB_PTHREAD_ADAPTIVE_MUTEX",
     "-DROCKSDB_BACKTRACE",
-    "-Wshorten-64-to-32",
+    "-Wnarrowing",
 ]
 
 rocksdb_external_deps = [
@@ -135,15 +135,4 @@ if not is_opt_mode:
           command = [TEST_RUNNER, BUCK_BINS + test_bin]
         )
 
-custom_unittest(
-    name = "make_rocksdbjavastatic",
-    command = ["internal_repo_rocksdb/make_rocksdbjavastatic.sh"],
-    type = "simple",
-)
-
-custom_unittest(
-    name = "make_rocksdb_lite_release",
-    command = ["internal_repo_rocksdb/make_rocksdb_lite_release.sh"],
-    type = "simple",
-)
 """

build_tools/build_detect_platform

@@ -53,11 +53,13 @@ if [ -z "$ROCKSDB_NO_FBCODE" -a -d /mnt/gvfs/third-party ]; then
     FBCODE_BUILD="true"
     # If we're compiling with TSAN we need pic build
     PIC_BUILD=$COMPILE_WITH_TSAN
-    if [ -z "$ROCKSDB_FBCODE_BUILD_WITH_481" ]; then
-      source "$PWD/build_tools/fbcode_config.sh"
-    else
+    if [ -n "$ROCKSDB_FBCODE_BUILD_WITH_481" ]; then
       # we need this to build with MySQL. Don't use for other purposes.
       source "$PWD/build_tools/fbcode_config4.8.1.sh"
+    elif [ -n "$ROCKSDB_FBCODE_BUILD_WITH_5xx" ]; then
+      source "$PWD/build_tools/fbcode_config.sh"
+    else
+      source "$PWD/build_tools/fbcode_config_platform007.sh"
     fi
 fi
 

build_tools/dependencies_platform007.sh

@@ -0,0 +1,18 @@
+GCC_BASE=/mnt/gvfs/third-party2/gcc/6e8e715624fd15256a7970073387793dfcf79b46/7.x/centos7-native/b2ef2b6
+CLANG_BASE=/mnt/gvfs/third-party2/llvm-fb/ef37e1faa1c29782abfac1ae65a291b9b7966f6d/stable/centos7-native/c9f9104
+LIBGCC_BASE=/mnt/gvfs/third-party2/libgcc/c67031f0f739ac61575a061518d6ef5038f99f90/7.x/platform007/5620abc
+GLIBC_BASE=/mnt/gvfs/third-party2/glibc/60d6f124a78798b73944f5ba87c2306ae3460153/2.26/platform007/f259413
+SNAPPY_BASE=/mnt/gvfs/third-party2/snappy/7f9bdaada18f59bc27ec2b0871eb8a6144343aef/1.1.3/platform007/ca4da3d
+ZLIB_BASE=/mnt/gvfs/third-party2/zlib/22c2d65676fb7c23cfa797c4f6937f38b026f3cf/1.2.8/platform007/ca4da3d
+BZIP2_BASE=/mnt/gvfs/third-party2/bzip2/dc49a21c5fceec6456a7a28a94dcd16690af1337/1.0.6/platform007/ca4da3d
+LZ4_BASE=/mnt/gvfs/third-party2/lz4/907b498203d297947f3bb70b9466f47e100f1873/r131/platform007/ca4da3d
+ZSTD_BASE=/mnt/gvfs/third-party2/zstd/3ee276cbacfad3074e3f07bf826ac47f06970f4e/1.3.5/platform007/15a3614
+GFLAGS_BASE=/mnt/gvfs/third-party2/gflags/0b9929d2588991c65a57168bf88aff2db87c5d48/2.2.0/platform007/ca4da3d
+JEMALLOC_BASE=/mnt/gvfs/third-party2/jemalloc/9c910d36d6235cc40e8ff559358f1833452300ca/master/platform007/5b0f53e
+NUMA_BASE=/mnt/gvfs/third-party2/numa/9cbf2460284c669ed19c3ccb200a71f7dd7e53c7/2.0.11/platform007/ca4da3d
+LIBUNWIND_BASE=/mnt/gvfs/third-party2/libunwind/bf3d7497fe4e6d007354f0adffa16ce3003f8338/1.3/platform007/6f3e0a9
+TBB_BASE=/mnt/gvfs/third-party2/tbb/ff4e0b093534704d8abab678a4fd7f5ea7b094c7/2018_U5/platform007/ca4da3d
+KERNEL_HEADERS_BASE=/mnt/gvfs/third-party2/kernel-headers/b5c4a61a5c483ba24722005ae07895971a2ac707/fb/platform007/da39a3e
+BINUTILS_BASE=/mnt/gvfs/third-party2/binutils/92ff90349e2f43ea0a8246d8b1cf17b6869013e3/2.29.1/centos7-native/da39a3e
+VALGRIND_BASE=/mnt/gvfs/third-party2/valgrind/f3f697a28122e6bcd513273dd9c1ff23852fc59f/3.13.0/platform007/ca4da3d
+LUA_BASE=/mnt/gvfs/third-party2/lua/f0cd714433206d5139df61659eb7b28b1dea6683/5.3.4/platform007/5007832

build_tools/fbcode_config_platform007.sh

@@ -0,0 +1,157 @@
+#!/bin/sh
+#
+# Set environment variables so that we can compile rocksdb using
+# fbcode settings.  It uses the latest g++ and clang compilers and also
+# uses jemalloc
+# Environment variables that change the behavior of this script:
+# PIC_BUILD -- if true, it will only take pic versions of libraries from fbcode. libraries that don't have pic variant will not be included
+
+
+BASEDIR=`dirname $BASH_SOURCE`
+source "$BASEDIR/dependencies_platform007.sh"
+
+CFLAGS=""
+
+# libgcc
+LIBGCC_INCLUDE="$LIBGCC_BASE/include/c++/7.3.0"
+LIBGCC_LIBS=" -L $LIBGCC_BASE/lib"
+
+# glibc
+GLIBC_INCLUDE="$GLIBC_BASE/include"
+GLIBC_LIBS=" -L $GLIBC_BASE/lib"
+
+# snappy
+SNAPPY_INCLUDE=" -I $SNAPPY_BASE/include/"
+if test -z $PIC_BUILD; then
+  SNAPPY_LIBS=" $SNAPPY_BASE/lib/libsnappy.a"
+else
+  SNAPPY_LIBS=" $SNAPPY_BASE/lib/libsnappy_pic.a"
+fi
+CFLAGS+=" -DSNAPPY"
+
+if test -z $PIC_BUILD; then
+  # location of zlib headers and libraries
+  ZLIB_INCLUDE=" -I $ZLIB_BASE/include/"
+  ZLIB_LIBS=" $ZLIB_BASE/lib/libz.a"
+  CFLAGS+=" -DZLIB"
+
+  # location of bzip headers and libraries
+  BZIP_INCLUDE=" -I $BZIP2_BASE/include/"
+  BZIP_LIBS=" $BZIP2_BASE/lib/libbz2.a"
+  CFLAGS+=" -DBZIP2"
+
+  LZ4_INCLUDE=" -I $LZ4_BASE/include/"
+  LZ4_LIBS=" $LZ4_BASE/lib/liblz4.a"
+  CFLAGS+=" -DLZ4"
+fi
+
+ZSTD_INCLUDE=" -I $ZSTD_BASE/include/"
+if test -z $PIC_BUILD; then
+  ZSTD_LIBS=" $ZSTD_BASE/lib/libzstd.a"
+else
+  ZSTD_LIBS=" $ZSTD_BASE/lib/libzstd_pic.a"
+fi
+CFLAGS+=" -DZSTD"
+
+# location of gflags headers and libraries
+GFLAGS_INCLUDE=" -I $GFLAGS_BASE/include/"
+if test -z $PIC_BUILD; then
+  GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags.a"
+else
+  GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags_pic.a"
+fi
+CFLAGS+=" -DGFLAGS=gflags"
+
+# location of jemalloc
+JEMALLOC_INCLUDE=" -I $JEMALLOC_BASE/include/"
+JEMALLOC_LIB=" $JEMALLOC_BASE/lib/libjemalloc.a"
+
+if test -z $PIC_BUILD; then
+  # location of numa
+  NUMA_INCLUDE=" -I $NUMA_BASE/include/"
+  NUMA_LIB=" $NUMA_BASE/lib/libnuma.a"
+  CFLAGS+=" -DNUMA"
+
+  # location of libunwind
+  LIBUNWIND="$LIBUNWIND_BASE/lib/libunwind.a"
+fi
+
+# location of TBB
+TBB_INCLUDE=" -isystem $TBB_BASE/include/"
+if test -z $PIC_BUILD; then
+  TBB_LIBS="$TBB_BASE/lib/libtbb.a"
+else
+  TBB_LIBS="$TBB_BASE/lib/libtbb_pic.a"
+fi
+CFLAGS+=" -DTBB"
+
+# use Intel SSE support for checksum calculations
+export USE_SSE=1
+export PORTABLE=1
+
+BINUTILS="$BINUTILS_BASE/bin"
+AR="$BINUTILS/ar"
+
+DEPS_INCLUDE="$SNAPPY_INCLUDE $ZLIB_INCLUDE $BZIP_INCLUDE $LZ4_INCLUDE $ZSTD_INCLUDE $GFLAGS_INCLUDE $NUMA_INCLUDE $TBB_INCLUDE"
+
+STDLIBS="-L $GCC_BASE/lib64"
+
+CLANG_BIN="$CLANG_BASE/bin"
+CLANG_LIB="$CLANG_BASE/lib"
+CLANG_SRC="$CLANG_BASE/../../src"
+
+CLANG_ANALYZER="$CLANG_BIN/clang++"
+CLANG_SCAN_BUILD="$CLANG_SRC/llvm/tools/clang/tools/scan-build/bin/scan-build"
+
+if [ -z "$USE_CLANG" ]; then
+  # gcc
+  CC="$GCC_BASE/bin/gcc"
+  CXX="$GCC_BASE/bin/g++"
+
+  CFLAGS+=" -B$BINUTILS/gold"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  JEMALLOC=1
+else
+  # clang
+  CLANG_INCLUDE="$CLANG_LIB/clang/stable/include"
+  CC="$CLANG_BIN/clang"
+  CXX="$CLANG_BIN/clang++"
+
+  KERNEL_HEADERS_INCLUDE="$KERNEL_HEADERS_BASE/include"
+
+  CFLAGS+=" -B$BINUTILS/gold -nostdinc -nostdlib"
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/7.x "
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/7.x/x86_64-facebook-linux "
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  CFLAGS+=" -isystem $CLANG_INCLUDE"
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE/linux "
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE "
+  CFLAGS+=" -Wno-expansion-to-defined "
+  CXXFLAGS="-nostdinc++"
+fi
+
+CFLAGS+=" $DEPS_INCLUDE"
+CFLAGS+=" -DROCKSDB_PLATFORM_POSIX -DROCKSDB_LIB_IO_POSIX -DROCKSDB_FALLOCATE_PRESENT -DROCKSDB_MALLOC_USABLE_SIZE -DROCKSDB_RANGESYNC_PRESENT -DROCKSDB_SCHED_GETCPU_PRESENT -DROCKSDB_SUPPORT_THREAD_LOCAL -DHAVE_SSE42"
+CXXFLAGS+=" $CFLAGS"
+
+EXEC_LDFLAGS=" $SNAPPY_LIBS $ZLIB_LIBS $BZIP_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS $NUMA_LIB $TBB_LIBS"
+EXEC_LDFLAGS+=" -B$BINUTILS/gold"
+EXEC_LDFLAGS+=" -Wl,--dynamic-linker,/usr/local/fbcode/platform007/lib/ld.so"
+EXEC_LDFLAGS+=" $LIBUNWIND"
+EXEC_LDFLAGS+=" -Wl,-rpath=/usr/local/fbcode/platform007/lib"
+# required by libtbb
+EXEC_LDFLAGS+=" -ldl"
+
+PLATFORM_LDFLAGS="$LIBGCC_LIBS $GLIBC_LIBS $STDLIBS -lgcc -lstdc++"
+
+EXEC_LDFLAGS_SHARED="$SNAPPY_LIBS $ZLIB_LIBS $BZIP_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS $TBB_LIBS"
+
+VALGRIND_VER="$VALGRIND_BASE/bin/"
+
+# lua not supported because it's on track for deprecation, I think
+LUA_PATH=
+LUA_LIB=
+
+export CC CXX AR CFLAGS CXXFLAGS EXEC_LDFLAGS EXEC_LDFLAGS_SHARED VALGRIND_VER JEMALLOC_LIB JEMALLOC_INCLUDE CLANG_ANALYZER CLANG_SCAN_BUILD LUA_PATH LUA_LIB

build_tools/rocksdb-lego-determinator

@@ -85,8 +85,9 @@ NON_SHM="TMPD=/tmp/rocksdb_test_tmp"
 GCC_481="ROCKSDB_FBCODE_BUILD_WITH_481=1"
 ASAN="COMPILE_WITH_ASAN=1"
 CLANG="USE_CLANG=1"
-LITE="OPT=\"-DROCKSDB_LITE -g\""
-TSAN="COMPILE_WITH_TSAN=1"
+# in gcc-5 there are known problems with TSAN like https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71090.
+# using platform007 gives us gcc-8 or higher which has that bug fixed.
+TSAN="ROCKSDB_FBCODE_BUILD_WITH_PLATFORM007=1 COMPILE_WITH_TSAN=1"
 UBSAN="COMPILE_WITH_UBSAN=1"
 DISABLE_JEMALLOC="DISABLE_JEMALLOC=1"
 HTTP_PROXY="https_proxy=http://fwdproxy.29.prn1:8080 http_proxy=http://fwdproxy.29.prn1:8080 ftp_proxy=http://fwdproxy.29.prn1:8080"

build_tools/update_dependencies.sh

@@ -53,6 +53,45 @@ function get_lib_base()
   log_variable $__res_var
 }
 
+###########################################################
+#                platform007 dependencies                 #
+###########################################################
+
+OUTPUT="$BASEDIR/dependencies_platform007.sh"
+
+rm -f "$OUTPUT"
+touch "$OUTPUT"
+
+echo "Writing dependencies to $OUTPUT"
+
+# Compilers locations
+GCC_BASE=`readlink -f $TP2_LATEST/gcc/7.x/centos7-native/*/`
+CLANG_BASE=`readlink -f $TP2_LATEST/llvm-fb/stable/centos7-native/*/`
+
+log_variable GCC_BASE
+log_variable CLANG_BASE
+
+# Libraries locations
+get_lib_base libgcc     7.x     platform007
+get_lib_base glibc      2.26    platform007
+get_lib_base snappy     LATEST  platform007
+get_lib_base zlib       LATEST  platform007
+get_lib_base bzip2      LATEST  platform007
+get_lib_base lz4        LATEST  platform007
+get_lib_base zstd       LATEST  platform007
+get_lib_base gflags     LATEST  platform007
+get_lib_base jemalloc   LATEST  platform007
+get_lib_base numa       LATEST  platform007
+get_lib_base libunwind  LATEST  platform007
+get_lib_base tbb        LATEST  platform007
+
+get_lib_base kernel-headers fb platform007
+get_lib_base binutils   LATEST centos7-native
+get_lib_base valgrind   LATEST platform007
+get_lib_base lua        5.3.4  platform007
+
+git diff $OUTPUT
+
 ###########################################################
 #                   5.x dependencies                      #
 ###########################################################

db/column_family_test.cc

@@ -2824,6 +2824,27 @@ TEST_F(ColumnFamilyTest, CreateAndDestoryOptions) {
   ASSERT_OK(db_->DestroyColumnFamilyHandle(cfh));
 }
 
+TEST_F(ColumnFamilyTest, CreateDropAndDestroy) {
+  ColumnFamilyHandle* cfh;
+  Open();
+  ASSERT_OK(db_->CreateColumnFamily(ColumnFamilyOptions(), "yoyo", &cfh));
+  ASSERT_OK(db_->Put(WriteOptions(), cfh, "foo", "bar"));
+  ASSERT_OK(db_->Flush(FlushOptions(), cfh));
+  ASSERT_OK(db_->DropColumnFamily(cfh));
+  ASSERT_OK(db_->DestroyColumnFamilyHandle(cfh));
+}
+
+TEST_F(ColumnFamilyTest, CreateDropAndDestroyWithoutFileDeletion) {
+  ColumnFamilyHandle* cfh;
+  Open();
+  ASSERT_OK(db_->CreateColumnFamily(ColumnFamilyOptions(), "yoyo", &cfh));
+  ASSERT_OK(db_->Put(WriteOptions(), cfh, "foo", "bar"));
+  ASSERT_OK(db_->Flush(FlushOptions(), cfh));
+  ASSERT_OK(db_->DisableFileDeletions());
+  ASSERT_OK(db_->DropColumnFamily(cfh));
+  ASSERT_OK(db_->DestroyColumnFamilyHandle(cfh));
+}
+
 #ifndef ROCKSDB_LITE
 TEST_F(ColumnFamilyTest, FlushCloseWALFiles) {
   SpecialEnv env(Env::Default());

db/db_impl_files.cc

@@ -12,6 +12,7 @@
 #define __STDC_FORMAT_MACROS
 #endif
 #include <inttypes.h>
+#include <set>
 #include <unordered_set>
 #include "db/event_helpers.h"
 #include "db/memtable_list.h"
@@ -99,10 +100,10 @@ void DBImpl::FindObsoleteFiles(JobContext* job_context, bool force,
   if (doing_the_full_scan) {
     InfoLogPrefix info_log_prefix(!immutable_db_options_.db_log_dir.empty(),
         dbname_);
-    std::vector<std::string> paths;
+    std::set<std::string> paths;
     for (size_t path_id = 0; path_id < immutable_db_options_.db_paths.size();
          path_id++) {
-      paths.emplace_back(immutable_db_options_.db_paths[path_id].path);
+      paths.insert(immutable_db_options_.db_paths[path_id].path);
     }
 
     // Note that if cf_paths is not specified in the ColumnFamilyOptions
@@ -113,7 +114,11 @@ void DBImpl::FindObsoleteFiles(JobContext* job_context, bool force,
     for (auto cfd : *versions_->GetColumnFamilySet()) {
       for (size_t path_id = 0; path_id < cfd->ioptions()->cf_paths.size();
            path_id++) {
-        paths.emplace_back(cfd->ioptions()->cf_paths[path_id].path);
+        auto& path = cfd->ioptions()->cf_paths[path_id].path;
+
+        if (paths.find(path) == paths.end()) {
+          paths.insert(path);
+        }
       }
     }
 

db/db_iter_test.cc

@@ -36,7 +36,9 @@ class TestIterator : public InternalIterator {
         valid_(false),
         sequence_number_(0),
         iter_(0),
-        cmp(comparator) {}
+        cmp(comparator) {
+    data_.reserve(16);
+  }
 
   void AddPut(std::string argkey, std::string argvalue) {
     Add(argkey, kTypeValue, argvalue);
@@ -2605,7 +2607,7 @@ TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace1) {
   // MergeIterator::Prev() realized the mem table iterator is at its end
   // and before an SeekToLast() is called.
   rocksdb::SyncPoint::GetInstance()->SetCallBack(
-      "MergeIterator::Prev:BeforeSeekToLast",
+      "MergeIterator::Prev:BeforePrev",
       [&](void* /*arg*/) { internal_iter2_->Add("z", kTypeValue, "7", 12u); });
   rocksdb::SyncPoint::GetInstance()->EnableProcessing();
 
@@ -2641,7 +2643,7 @@ TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace2) {
   // mem table after MergeIterator::Prev() realized the mem tableiterator is at
   // its end and before an SeekToLast() is called.
   rocksdb::SyncPoint::GetInstance()->SetCallBack(
-      "MergeIterator::Prev:BeforeSeekToLast", [&](void* /*arg*/) {
+      "MergeIterator::Prev:BeforePrev", [&](void* /*arg*/) {
         internal_iter2_->Add("z", kTypeValue, "7", 12u);
         internal_iter2_->Add("z", kTypeValue, "7", 11u);
       });
@@ -2679,7 +2681,7 @@ TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace3) {
   // mem table after MergeIterator::Prev() realized the mem table iterator is at
   // its end and before an SeekToLast() is called.
   rocksdb::SyncPoint::GetInstance()->SetCallBack(
-      "MergeIterator::Prev:BeforeSeekToLast", [&](void* /*arg*/) {
+      "MergeIterator::Prev:BeforePrev", [&](void* /*arg*/) {
         internal_iter2_->Add("z", kTypeValue, "7", 16u, true);
         internal_iter2_->Add("z", kTypeValue, "7", 15u, true);
         internal_iter2_->Add("z", kTypeValue, "7", 14u, true);

db/db_iterator_test.cc

@@ -2043,6 +2043,43 @@ TEST_P(DBIteratorTest, CreationFailure) {
   delete iter;
 }
 
+TEST_P(DBIteratorTest, UpperBoundWithChangeDirection) {
+  Options options = CurrentOptions();
+  options.max_sequential_skip_in_iterations = 3;
+  DestroyAndReopen(options);
+
+  // write a bunch of kvs to the database.
+  ASSERT_OK(Put("a", "1"));
+  ASSERT_OK(Put("y", "1"));
+  ASSERT_OK(Put("y1", "1"));
+  ASSERT_OK(Put("y2", "1"));
+  ASSERT_OK(Put("y3", "1"));
+  ASSERT_OK(Put("z", "1"));
+  ASSERT_OK(Flush());
+  ASSERT_OK(Put("a", "1"));
+  ASSERT_OK(Put("z", "1"));
+  ASSERT_OK(Put("bar", "1"));
+  ASSERT_OK(Put("foo", "1"));
+
+  std::string upper_bound = "x";
+  Slice ub_slice(upper_bound);
+  ReadOptions ro;
+  ro.iterate_upper_bound = &ub_slice;
+  ro.max_skippable_internal_keys = 1000;
+
+  Iterator* iter = NewIterator(ro);
+  iter->Seek("foo");
+  ASSERT_TRUE(iter->Valid());
+  ASSERT_EQ("foo", iter->key().ToString());
+
+  iter->Prev();
+  ASSERT_TRUE(iter->Valid());
+  ASSERT_OK(iter->status());
+  ASSERT_EQ("bar", iter->key().ToString());
+
+  delete iter;
+}
+
 TEST_P(DBIteratorTest, TableFilter) {
   ASSERT_OK(Put("a", "1"));
   dbfull()->Flush(FlushOptions());
@@ -2109,6 +2146,47 @@ TEST_P(DBIteratorTest, TableFilter) {
   }
 }
 
+TEST_P(DBIteratorTest, UpperBoundWithPrevReseek) {
+  Options options = CurrentOptions();
+  options.max_sequential_skip_in_iterations = 3;
+  DestroyAndReopen(options);
+
+  // write a bunch of kvs to the database.
+  ASSERT_OK(Put("a", "1"));
+  ASSERT_OK(Put("y", "1"));
+  ASSERT_OK(Put("z", "1"));
+  ASSERT_OK(Flush());
+  ASSERT_OK(Put("a", "1"));
+  ASSERT_OK(Put("z", "1"));
+  ASSERT_OK(Put("bar", "1"));
+  ASSERT_OK(Put("foo", "1"));
+  ASSERT_OK(Put("foo", "2"));
+
+  ASSERT_OK(Put("foo", "3"));
+  ASSERT_OK(Put("foo", "4"));
+  ASSERT_OK(Put("foo", "5"));
+  const Snapshot* snapshot = db_->GetSnapshot();
+  ASSERT_OK(Put("foo", "6"));
+
+  std::string upper_bound = "x";
+  Slice ub_slice(upper_bound);
+  ReadOptions ro;
+  ro.snapshot = snapshot;
+  ro.iterate_upper_bound = &ub_slice;
+
+  Iterator* iter = NewIterator(ro);
+  iter->SeekForPrev("goo");
+  ASSERT_TRUE(iter->Valid());
+  ASSERT_EQ("foo", iter->key().ToString());
+  iter->Prev();
+
+  ASSERT_TRUE(iter->Valid());
+  ASSERT_EQ("bar", iter->key().ToString());
+
+  delete iter;
+  db_->ReleaseSnapshot(snapshot);
+}
+
 TEST_P(DBIteratorTest, SkipStatistics) {
   Options options = CurrentOptions();
   options.statistics = rocksdb::CreateDBStatistics();

db/memtable.cc

@@ -696,7 +696,7 @@ static bool SaveValue(void* arg, const char* entry) {
         *(s->merge_in_progress) = true;
         merge_context->PushOperand(
             v, s->inplace_update_support == false /* operand_pinned */);
-        if (merge_operator->ShouldMerge(merge_context->GetOperands())) {
+        if (merge_operator->ShouldMerge(merge_context->GetOperandsDirectionBackward())) {
           *(s->status) = MergeHelper::TimedFullMerge(
               merge_operator, s->key->user_key(), nullptr,
               merge_context->GetOperands(), s->value, s->logger, s->statistics,

db/merge_context.h

@@ -74,8 +74,13 @@ class MergeContext {
     return (*operand_list_)[index];
   }
 
-  // Return all the operands.
+  // Same as GetOperandsDirectionForward
   const std::vector<Slice>& GetOperands() {
+    return GetOperandsDirectionForward();
+  }
+
+  // Return all the operands in the order as they were merged (passed to FullMerge or FullMergeV2)
+  const std::vector<Slice>& GetOperandsDirectionForward() {
     if (!operand_list_) {
       return empty_operand_list;
     }
@@ -84,6 +89,16 @@ class MergeContext {
     return *operand_list_;
   }
 
+  // Return all the operands in the reversed order relative to how they were merged (passed to FullMerge or FullMergeV2)
+  const std::vector<Slice>& GetOperandsDirectionBackward() {
+    if (!operand_list_) {
+      return empty_operand_list;
+    }
+
+    SetDirectionBackward();
+    return *operand_list_;
+  }
+
  private:
   void Initialize() {
     if (!operand_list_) {

include/rocksdb/merge_operator.h

@@ -195,6 +195,11 @@ class MergeOperator {
   // during a point lookup, thereby helping in limiting the number of levels to
   // read from.
   // Doesn't help with iterators.
+  //
+  // Note: the merge operands are passed to this function in the reversed order
+  // relative to how they were merged (passed to FullMerge or FullMergeV2)
+  // for performance reasons, see also:
+  // https://github.com/facebook/rocksdb/issues/3865
   virtual bool ShouldMerge(const std::vector<Slice>& /*operands*/) const {
     return false;
   }

include/rocksdb/sst_file_manager.h

@@ -98,12 +98,13 @@ class SstFileManager {
 //    DeleteScheduler immediately
 // @param bytes_max_delete_chunk: if a single file is larger than delete chunk,
 //    ftruncate the file by this size each time, rather than dropping the whole
-//    file. 0 means to always delete the whole file.
+//    file. 0 means to always delete the whole file. NOTE this options may not
+//    work well with checkpoints, which relies on file system hard links.
 extern SstFileManager* NewSstFileManager(
     Env* env, std::shared_ptr<Logger> info_log = nullptr,
     std::string trash_dir = "", int64_t rate_bytes_per_sec = 0,
     bool delete_existing_trash = true, Status* status = nullptr,
     double max_trash_db_ratio = 0.25,
-    uint64_t bytes_max_delete_chunk = 64 * 1024 * 1024);
+    uint64_t bytes_max_delete_chunk = 0);
 
 }  // namespace rocksdb

include/rocksdb/utilities/ldb_cmd.h

@@ -210,12 +210,20 @@ class LDBCommand {
   bool ParseStringOption(const std::map<std::string, std::string>& options,
                          const std::string& option, std::string* value);
 
+  /**
+   * Returns the value of the specified option as a boolean.
+   * default_val is used if the option is not found in options.
+   * Throws an exception if the value of the option is not
+   * "true" or "false" (case insensitive).
+   */
+  bool ParseBooleanOption(const std::map<std::string, std::string>& options,
+                          const std::string& option, bool default_val);
+
   Options options_;
   std::vector<ColumnFamilyDescriptor> column_families_;
   LDBOptions ldb_options_;
 
  private:
-  friend class WALDumperCommand;
   /**
    * Interpret command line options and flags to determine if the key
    * should be input/output in hex.
@@ -230,15 +238,6 @@ class LDBCommand {
   bool IsValueHex(const std::map<std::string, std::string>& options,
                   const std::vector<std::string>& flags);
 
-  /**
-   * Returns the value of the specified option as a boolean.
-   * default_val is used if the option is not found in options.
-   * Throws an exception if the value of the option is not
-   * "true" or "false" (case insensitive).
-   */
-  bool ParseBooleanOption(const std::map<std::string, std::string>& options,
-                          const std::string& option, bool default_val);
-
   /**
    * Converts val to a boolean.
    * val must be either true or false (case insensitive).

include/rocksdb/version.h

@@ -6,7 +6,7 @@
 
 #define ROCKSDB_MAJOR 5
 #define ROCKSDB_MINOR 14
-#define ROCKSDB_PATCH 0
+#define ROCKSDB_PATCH 3
 
 // Do not use these. We made the mistake of declaring macros starting with
 // double underscore. Now we have to live with our choice. We'll deprecate these

java/rocksjni/options.cc

@@ -3230,7 +3230,7 @@ Java_org_rocksdb_ColumnFamilyOptions_setCompactionFilterFactoryHandle(
     JNIEnv* /*env*/, jobject /*jobj*/, jlong jopt_handle,
     jlong jcompactionfilterfactory_handle) {
   auto* cff_factory =
-      reinterpret_cast<std::shared_ptr<rocksdb::CompactionFilterFactory>*>(
+      reinterpret_cast<std::shared_ptr<rocksdb::CompactionFilterFactoryJniCallback>*>(
           jcompactionfilterfactory_handle);
   reinterpret_cast<rocksdb::ColumnFamilyOptions*>(jopt_handle)
       ->compaction_filter_factory = *cff_factory;

java/rocksjni/portal.h

@@ -4292,25 +4292,12 @@ class JniUtil {
      * @param bytes The bytes to copy
      *
      * @return the Java byte[] or nullptr if an exception occurs
+     * 
+     * @throws RocksDBException thrown 
+     *   if memory size to copy exceeds general java specific array size limitation.
      */
     static jbyteArray copyBytes(JNIEnv* env, std::string bytes) {
-      const jsize jlen = static_cast<jsize>(bytes.size());
-
-      jbyteArray jbytes = env->NewByteArray(jlen);
-      if(jbytes == nullptr) {
-        // exception thrown: OutOfMemoryError
-        return nullptr;
-      }
-
-      env->SetByteArrayRegion(jbytes, 0, jlen,
-        const_cast<jbyte*>(reinterpret_cast<const jbyte*>(bytes.c_str())));
-      if(env->ExceptionCheck()) {
-        // exception thrown: ArrayIndexOutOfBoundsException
-        env->DeleteLocalRef(jbytes);
-        return nullptr;
-      }
-
-      return jbytes;
+      return createJavaByteArrayWithSizeCheck(env, bytes.c_str(), bytes.size());
     }
 
     /**
@@ -4473,6 +4460,47 @@ class JniUtil {
 
       return jbyte_strings;
     }
+    
+    /**
+      * Copies bytes to a new jByteArray with the check of java array size limitation.
+      *
+      * @param bytes pointer to memory to copy to a new jByteArray
+      * @param size number of bytes to copy
+      *
+      * @return the Java byte[] or nullptr if an exception occurs
+      * 
+      * @throws RocksDBException thrown 
+      *   if memory size to copy exceeds general java array size limitation to avoid overflow.
+      */
+    static jbyteArray createJavaByteArrayWithSizeCheck(JNIEnv* env, const char* bytes, const size_t size) {
+      // Limitation for java array size is vm specific
+      // In general it cannot exceed Integer.MAX_VALUE (2^31 - 1)
+      // Current HotSpot VM limitation for array size is Integer.MAX_VALUE - 5 (2^31 - 1 - 5)
+      // It means that the next call to env->NewByteArray can still end with 
+      // OutOfMemoryError("Requested array size exceeds VM limit") coming from VM
+      static const size_t MAX_JARRAY_SIZE = (static_cast<size_t>(1)) << 31;
+      if(size > MAX_JARRAY_SIZE) {
+        rocksdb::RocksDBExceptionJni::ThrowNew(env, "Requested array size exceeds VM limit");
+        return nullptr;
+      }
+      
+      const jsize jlen = static_cast<jsize>(size);
+      jbyteArray jbytes = env->NewByteArray(jlen);
+      if(jbytes == nullptr) {
+        // exception thrown: OutOfMemoryError	
+        return nullptr;
+      }
+      
+      env->SetByteArrayRegion(jbytes, 0, jlen,
+        const_cast<jbyte*>(reinterpret_cast<const jbyte*>(bytes)));
+      if(env->ExceptionCheck()) {
+        // exception thrown: ArrayIndexOutOfBoundsException
+        env->DeleteLocalRef(jbytes);
+        return nullptr;
+      }
+
+      return jbytes;
+    }
 
     /**
      * Copies bytes from a rocksdb::Slice to a jByteArray
@@ -4481,25 +4509,12 @@ class JniUtil {
      * @param bytes The bytes to copy
      *
      * @return the Java byte[] or nullptr if an exception occurs
+     * 
+     * @throws RocksDBException thrown 
+     *   if memory size to copy exceeds general java specific array size limitation.
      */
     static jbyteArray copyBytes(JNIEnv* env, const Slice& bytes) {
-      const jsize jlen = static_cast<jsize>(bytes.size());
-
-      jbyteArray jbytes = env->NewByteArray(jlen);
-      if(jbytes == nullptr) {
-        // exception thrown: OutOfMemoryError
-        return nullptr;
-      }
-
-      env->SetByteArrayRegion(jbytes, 0, jlen,
-        const_cast<jbyte*>(reinterpret_cast<const jbyte*>(bytes.data())));
-      if(env->ExceptionCheck()) {
-        // exception thrown: ArrayIndexOutOfBoundsException
-        env->DeleteLocalRef(jbytes);
-        return nullptr;
-      }
-
-      return jbytes;
+      return createJavaByteArrayWithSizeCheck(env, bytes.data(), bytes.size());
     }
 
     /*

java/rocksjni/sst_file_manager.cc

@@ -138,7 +138,7 @@ jobject Java_org_rocksdb_SstFileManager_getTrackedFiles(JNIEnv* env,
 
   const rocksdb::HashMapJni::FnMapKV<const std::string, const uint64_t>
       fn_map_kv =
-          [env, &tracked_files](
+          [env](
               const std::pair<const std::string, const uint64_t>& pair) {
             const jstring jtracked_file_path =
                 env->NewStringUTF(pair.first.c_str());

java/rocksjni/transaction.cc

@@ -48,7 +48,7 @@ void Java_org_rocksdb_Transaction_setSnapshotOnNextOperation__JJ(
     jlong jtxn_notifier_handle) {
   auto* txn = reinterpret_cast<rocksdb::Transaction*>(jhandle);
   auto* txn_notifier =
-      reinterpret_cast<std::shared_ptr<rocksdb::TransactionNotifier>*>(
+      reinterpret_cast<std::shared_ptr<rocksdb::TransactionNotifierJniCallback>*>(
           jtxn_notifier_handle);
   txn->SetSnapshotOnNextOperation(*txn_notifier);
 }

java/rocksjni/transaction_db.cc

@@ -309,7 +309,7 @@ jobject Java_org_rocksdb_TransactionDB_getLockStatusData(JNIEnv* env,
 
   const rocksdb::HashMapJni::FnMapKV<const int32_t, const rocksdb::KeyLockInfo>
       fn_map_kv =
-          [env, txn_db, &lock_status_data](
+          [env](
               const std::pair<const int32_t, const rocksdb::KeyLockInfo>&
                   pair) {
             const jobject jlong_column_family_id =

java/src/main/java/org/rocksdb/ColumnFamilyHandle.java

@@ -28,8 +28,10 @@ public class ColumnFamilyHandle extends RocksObject {
    * Gets the name of the Column Family.
    *
    * @return The name of the Column Family.
+   *
+   * @throws RocksDBException if an error occurs whilst retrieving the name.
    */
-  public byte[] getName() {
+  public byte[] getName() throws RocksDBException {
     return getName(nativeHandle_);
   }
 
@@ -71,14 +73,22 @@ public class ColumnFamilyHandle extends RocksObject {
     }
 
     final ColumnFamilyHandle that = (ColumnFamilyHandle) o;
-    return rocksDB_.nativeHandle_ == that.rocksDB_.nativeHandle_ &&
-        getID() == that.getID() &&
-        Arrays.equals(getName(), that.getName());
+    try {
+      return rocksDB_.nativeHandle_ == that.rocksDB_.nativeHandle_ &&
+          getID() == that.getID() &&
+          Arrays.equals(getName(), that.getName());
+    } catch (RocksDBException e) {
+      throw new RuntimeException("Cannot compare column family handles", e);
+    }
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(getName(), getID(), rocksDB_.nativeHandle_);
+    try {
+      return Objects.hash(getName(), getID(), rocksDB_.nativeHandle_);
+    } catch (RocksDBException e) {
+      throw new RuntimeException("Cannot calculate hash code of column family handle", e);
+    }
   }
 
   /**
@@ -96,7 +106,7 @@ public class ColumnFamilyHandle extends RocksObject {
     }
   }
 
-  private native byte[] getName(final long handle);
+  private native byte[] getName(final long handle) throws RocksDBException;
   private native int getID(final long handle);
   private native ColumnFamilyDescriptor getDescriptor(final long handle) throws RocksDBException;
   @Override protected final native void disposeInternal(final long handle);

java/src/main/java/org/rocksdb/WriteBatch.java

@@ -65,8 +65,11 @@ public class WriteBatch extends AbstractWriteBatch {
    * Retrieve the serialized version of this batch.
    *
    * @return the serialized representation of this write batch.
+   *
+   * @throws RocksDBException if an error occurs whilst retrieving
+   *   the serialized batch data.
    */
-  public byte[] data() {
+  public byte[] data() throws RocksDBException {
     return data(nativeHandle_);
   }
 
@@ -253,7 +256,7 @@ public class WriteBatch extends AbstractWriteBatch {
       final int serializedLength);
   private native void iterate(final long handle, final long handlerHandle)
       throws RocksDBException;
-  private native byte[] data(final long nativeHandle);
+  private native byte[] data(final long nativeHandle) throws RocksDBException;
   private native long getDataSize(final long nativeHandle);
   private native boolean hasPut(final long nativeHandle);
   private native boolean hasDelete(final long nativeHandle);

java/src/test/java/org/rocksdb/RocksDBTest.java

@@ -4,9 +4,11 @@
 //  (found in the LICENSE.Apache file in the root directory).
 package org.rocksdb;
 
+import org.junit.Assume;
 import org.junit.ClassRule;
 import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
 import org.junit.rules.TemporaryFolder;
 
 import java.util.*;
@@ -143,6 +145,39 @@ public class RocksDBTest {
     }
   }
 
+  @Rule
+  public ExpectedException thrown = ExpectedException.none();
+
+  @Test
+  public void getOutOfArrayMaxSizeValue() throws RocksDBException {
+    final int numberOfValueSplits = 10;
+    final int splitSize = Integer.MAX_VALUE / numberOfValueSplits;
+
+    Runtime runtime = Runtime.getRuntime();
+    long neededMemory = ((long)(splitSize)) * (((long)numberOfValueSplits) + 3);
+    boolean isEnoughMemory = runtime.maxMemory() - runtime.totalMemory() > neededMemory;
+    Assume.assumeTrue(isEnoughMemory);
+
+    final byte[] valueSplit = new byte[splitSize];
+    final byte[] key = "key".getBytes();
+
+    thrown.expect(RocksDBException.class);
+    thrown.expectMessage("Requested array size exceeds VM limit");
+
+    // merge (numberOfValueSplits + 1) valueSplit's to get value size exceeding Integer.MAX_VALUE
+    try (final StringAppendOperator stringAppendOperator = new StringAppendOperator();
+         final Options opt = new Options()
+                 .setCreateIfMissing(true)
+                 .setMergeOperator(stringAppendOperator);
+         final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
+      db.put(key, valueSplit);
+      for (int i = 0; i < numberOfValueSplits; i++) {
+        db.merge(key, valueSplit);
+      }
+      db.get(key);
+    }
+  }
+
   @Test
   public void multiGet() throws RocksDBException, InterruptedException {
     try (final RocksDB db = RocksDB.open(dbFolder.getRoot().getAbsolutePath());

table/block.h

@@ -242,7 +242,7 @@ class BlockIter final : public InternalIterator {
   }
 
   // Makes Valid() return false, status() return `s`, and Seek()/Prev()/etc do
-  // nothing.
+  // nothing. Calls cleanup functions.
   void Invalidate(Status s) {
     // Assert that the BlockIter is never deleted while Pinning is Enabled.
     assert(!pinned_iters_mgr_ ||
@@ -252,6 +252,9 @@ class BlockIter final : public InternalIterator {
     current_ = restarts_;
     status_ = s;
 
+    // Call cleanup callbacks.
+    Cleanable::Reset();
+
     // Clear prev entries cache.
     prev_entries_keys_buff_.clear();
     prev_entries_.clear();

table/block_based_table_reader.h

@@ -420,7 +420,7 @@ struct BlockBasedTable::Rep {
 
   const ImmutableCFOptions& ioptions;
   const EnvOptions& env_options;
-  const BlockBasedTableOptions& table_options;
+  const BlockBasedTableOptions table_options;
   const FilterPolicy* const filter_policy;
   const InternalKeyComparator& internal_comparator;
   Status status;

table/full_filter_block.cc

@@ -72,8 +72,14 @@ inline void FullFilterBlockBuilder::AddPrefix(const Slice& key) {
   }
 }
 
+void FullFilterBlockBuilder::Reset() {
+  last_whole_key_recorded_ = false;
+  last_prefix_recorded_ = false;
+}
+
 Slice FullFilterBlockBuilder::Finish(const BlockHandle& /*tmp*/,
                                      Status* status) {
+  Reset();
   // In this impl we ignore BlockHandle
   *status = Status::OK();
   if (num_added_ != 0) {

table/full_filter_block.h

@@ -52,6 +52,7 @@ class FullFilterBlockBuilder : public FilterBlockBuilder {
  protected:
   virtual void AddKey(const Slice& key);
   std::unique_ptr<FilterBitsBuilder> filter_bits_builder_;
+  virtual void Reset();
 
  private:
   // important: all of these might point to invalid addresses

table/get_context.cc

@@ -200,7 +200,7 @@ bool GetContext::SaveValue(const ParsedInternalKey& parsed_key,
           merge_context_->PushOperand(value, false);
         }
         if (merge_operator_ != nullptr &&
-            merge_operator_->ShouldMerge(merge_context_->GetOperands())) {
+            merge_operator_->ShouldMerge(merge_context_->GetOperandsDirectionBackward())) {
           state_ = kFound;
           if (LIKELY(pinnable_val_ != nullptr)) {
             Status merge_status = MergeHelper::TimedFullMerge(

table/merging_iterator.cc

@@ -228,28 +228,12 @@ class MergingIterator : public InternalIterator {
       Slice target = key();
       for (auto& child : children_) {
         if (&child != current_) {
-          if (!prefix_seek_mode_) {
-            child.Seek(target);
-            if (child.Valid()) {
-              // Child is at first entry >= key().  Step back one to be < key()
-              TEST_SYNC_POINT_CALLBACK("MergeIterator::Prev:BeforePrev",
-                                       &child);
-              assert(child.status().ok());
-              child.Prev();
-            } else {
-              // Child has no entries >= key().  Position at last entry.
-              TEST_SYNC_POINT("MergeIterator::Prev:BeforeSeekToLast");
-              considerStatus(child.status());
-              child.SeekToLast();
-            }
+          child.SeekForPrev(target);
+          TEST_SYNC_POINT_CALLBACK("MergeIterator::Prev:BeforePrev", &child);
+          considerStatus(child.status());
+          if (child.Valid() && comparator_->Equal(target, child.key())) {
+            child.Prev();
             considerStatus(child.status());
-          } else {
-            child.SeekForPrev(target);
-            considerStatus(child.status());
-            if (child.Valid() && comparator_->Equal(target, child.key())) {
-              child.Prev();
-              considerStatus(child.status());
-            }
           }
         }
         if (child.Valid()) {

table/partitioned_filter_block.cc

@@ -48,6 +48,7 @@ void PartitionedFilterBlockBuilder::MaybeCutAFilterBlock() {
   std::string& index_key = p_index_builder_->GetPartitionKey();
   filters.push_back({index_key, filter});
   filters_in_partition_ = 0;
+  Reset();
 }
 
 void PartitionedFilterBlockBuilder::AddKey(const Slice& key) {

tools/ldb_cmd.cc

@@ -242,6 +242,14 @@ LDBCommand* LDBCommand::SelectCommand(const ParsedParams& parsed_params) {
   } else if (parsed_params.cmd == RestoreCommand::Name()) {
     return new RestoreCommand(parsed_params.cmd_params,
                               parsed_params.option_map, parsed_params.flags);
+  } else if (parsed_params.cmd == WriteExternalSstFilesCommand::Name()) {
+    return new WriteExternalSstFilesCommand(parsed_params.cmd_params,
+                                            parsed_params.option_map,
+                                            parsed_params.flags);
+  } else if (parsed_params.cmd == IngestExternalSstFilesCommand::Name()) {
+    return new IngestExternalSstFilesCommand(parsed_params.cmd_params,
+                                             parsed_params.option_map,
+                                             parsed_params.flags);
   }
   return nullptr;
 }
@@ -2936,5 +2944,180 @@ void DBFileDumperCommand::DoCommand() {
   }
 }
 
+void WriteExternalSstFilesCommand::Help(std::string& ret) {
+  ret.append("  ");
+  ret.append(WriteExternalSstFilesCommand::Name());
+  ret.append(" <output_sst_path>");
+  ret.append("\n");
+}
+
+WriteExternalSstFilesCommand::WriteExternalSstFilesCommand(
+    const std::vector<std::string>& params,
+    const std::map<std::string, std::string>& options,
+    const std::vector<std::string>& flags)
+    : LDBCommand(
+          options, flags, false /* is_read_only */,
+          BuildCmdLineOptions({ARG_HEX, ARG_KEY_HEX, ARG_VALUE_HEX, ARG_FROM,
+                               ARG_TO, ARG_CREATE_IF_MISSING})) {
+  create_if_missing_ =
+      IsFlagPresent(flags, ARG_CREATE_IF_MISSING) ||
+      ParseBooleanOption(options, ARG_CREATE_IF_MISSING, false);
+  if (params.size() != 1) {
+    exec_state_ = LDBCommandExecuteResult::Failed(
+        "output SST file path must be specified");
+  } else {
+    output_sst_path_ = params.at(0);
+  }
+}
+
+void WriteExternalSstFilesCommand::DoCommand() {
+  if (!db_) {
+    assert(GetExecuteState().IsFailed());
+    return;
+  }
+  ColumnFamilyHandle* cfh = GetCfHandle();
+  SstFileWriter sst_file_writer(EnvOptions(), db_->GetOptions(), cfh);
+  Status status = sst_file_writer.Open(output_sst_path_);
+  if (!status.ok()) {
+    exec_state_ = LDBCommandExecuteResult::Failed("failed to open SST file: " +
+                                                  status.ToString());
+    return;
+  }
+
+  int bad_lines = 0;
+  std::string line;
+  std::ifstream ifs_stdin("/dev/stdin");
+  std::istream* istream_p = ifs_stdin.is_open() ? &ifs_stdin : &std::cin;
+  while (getline(*istream_p, line, '\n')) {
+    std::string key;
+    std::string value;
+    if (ParseKeyValue(line, &key, &value, is_key_hex_, is_value_hex_)) {
+      status = sst_file_writer.Put(key, value);
+      if (!status.ok()) {
+        exec_state_ = LDBCommandExecuteResult::Failed(
+            "failed to write record to file: " + status.ToString());
+        return;
+      }
+    } else if (0 == line.find("Keys in range:")) {
+      // ignore this line
+    } else if (0 == line.find("Created bg thread 0x")) {
+      // ignore this line
+    } else {
+      bad_lines++;
+    }
+  }
+
+  status = sst_file_writer.Finish();
+  if (!status.ok()) {
+    exec_state_ = LDBCommandExecuteResult::Failed(
+        "Failed to finish writing to file: " + status.ToString());
+    return;
+  }
+
+  if (bad_lines > 0) {
+    fprintf(stderr, "Warning: %d bad lines ignored.\n", bad_lines);
+  }
+  exec_state_ = LDBCommandExecuteResult::Succeed(
+      "external SST file written to " + output_sst_path_);
+}
+
+Options WriteExternalSstFilesCommand::PrepareOptionsForOpenDB() {
+  Options opt = LDBCommand::PrepareOptionsForOpenDB();
+  opt.create_if_missing = create_if_missing_;
+  return opt;
+}
+
+const std::string IngestExternalSstFilesCommand::ARG_MOVE_FILES = "move_files";
+const std::string IngestExternalSstFilesCommand::ARG_SNAPSHOT_CONSISTENCY =
+    "snapshot_consistency";
+const std::string IngestExternalSstFilesCommand::ARG_ALLOW_GLOBAL_SEQNO =
+    "allow_global_seqno";
+const std::string IngestExternalSstFilesCommand::ARG_ALLOW_BLOCKING_FLUSH =
+    "allow_blocking_flush";
+const std::string IngestExternalSstFilesCommand::ARG_INGEST_BEHIND =
+    "ingest_behind";
+
+void IngestExternalSstFilesCommand::Help(std::string& ret) {
+  ret.append("  ");
+  ret.append(IngestExternalSstFilesCommand::Name());
+  ret.append(" <input_sst_path>");
+  ret.append(" [--" + ARG_MOVE_FILES + "] ");
+  ret.append(" [--" + ARG_SNAPSHOT_CONSISTENCY + "] ");
+  ret.append(" [--" + ARG_ALLOW_GLOBAL_SEQNO + "] ");
+  ret.append(" [--" + ARG_ALLOW_BLOCKING_FLUSH + "] ");
+  ret.append(" [--" + ARG_INGEST_BEHIND + "] ");
+  ret.append("\n");
+}
+
+IngestExternalSstFilesCommand::IngestExternalSstFilesCommand(
+    const std::vector<std::string>& params,
+    const std::map<std::string, std::string>& options,
+    const std::vector<std::string>& flags)
+    : LDBCommand(
+          options, flags, false /* is_read_only */,
+          BuildCmdLineOptions({ARG_MOVE_FILES, ARG_SNAPSHOT_CONSISTENCY,
+                               ARG_ALLOW_GLOBAL_SEQNO, ARG_CREATE_IF_MISSING,
+                               ARG_ALLOW_BLOCKING_FLUSH, ARG_INGEST_BEHIND})),
+      move_files_(false),
+      snapshot_consistency_(true),
+      allow_global_seqno_(true),
+      allow_blocking_flush_(true),
+      ingest_behind_(false) {
+  create_if_missing_ =
+      IsFlagPresent(flags, ARG_CREATE_IF_MISSING) ||
+      ParseBooleanOption(options, ARG_CREATE_IF_MISSING, false);
+  move_files_ = IsFlagPresent(flags, ARG_MOVE_FILES) ||
+                ParseBooleanOption(options, ARG_MOVE_FILES, false);
+  snapshot_consistency_ =
+      IsFlagPresent(flags, ARG_SNAPSHOT_CONSISTENCY) ||
+      ParseBooleanOption(options, ARG_SNAPSHOT_CONSISTENCY, true);
+  allow_global_seqno_ =
+      IsFlagPresent(flags, ARG_ALLOW_GLOBAL_SEQNO) ||
+      ParseBooleanOption(options, ARG_ALLOW_GLOBAL_SEQNO, true);
+  allow_blocking_flush_ =
+      IsFlagPresent(flags, ARG_ALLOW_BLOCKING_FLUSH) ||
+      ParseBooleanOption(options, ARG_ALLOW_BLOCKING_FLUSH, true);
+  ingest_behind_ = IsFlagPresent(flags, ARG_INGEST_BEHIND) ||
+                   ParseBooleanOption(options, ARG_INGEST_BEHIND, false);
+
+  if (params.size() != 1) {
+    exec_state_ =
+        LDBCommandExecuteResult::Failed("input SST path must be specified");
+  } else {
+    input_sst_path_ = params.at(0);
+  }
+}
+
+void IngestExternalSstFilesCommand::DoCommand() {
+  if (!db_) {
+    assert(GetExecuteState().IsFailed());
+    return;
+  }
+  if (GetExecuteState().IsFailed()) {
+    return;
+  }
+  ColumnFamilyHandle* cfh = GetCfHandle();
+  IngestExternalFileOptions ifo;
+  ifo.move_files = move_files_;
+  ifo.snapshot_consistency = snapshot_consistency_;
+  ifo.allow_global_seqno = allow_global_seqno_;
+  ifo.allow_blocking_flush = allow_blocking_flush_;
+  ifo.ingest_behind = ingest_behind_;
+  Status status = db_->IngestExternalFile(cfh, {input_sst_path_}, ifo);
+  if (!status.ok()) {
+    exec_state_ = LDBCommandExecuteResult::Failed(
+        "failed to ingest external SST: " + status.ToString());
+  } else {
+    exec_state_ =
+        LDBCommandExecuteResult::Succeed("external SST files ingested");
+  }
+}
+
+Options IngestExternalSstFilesCommand::PrepareOptionsForOpenDB() {
+  Options opt = LDBCommand::PrepareOptionsForOpenDB();
+  opt.create_if_missing = create_if_missing_;
+  return opt;
+}
+
 }   // namespace rocksdb
 #endif  // ROCKSDB_LITE

tools/ldb_cmd_impl.h

@@ -522,4 +522,55 @@ class RestoreCommand : public BackupableCommand {
   static void Help(std::string& ret);
 };
 
+class WriteExternalSstFilesCommand : public LDBCommand {
+ public:
+  static std::string Name() { return "write_extern_sst"; }
+  WriteExternalSstFilesCommand(
+      const std::vector<std::string>& params,
+      const std::map<std::string, std::string>& options,
+      const std::vector<std::string>& flags);
+
+  virtual void DoCommand() override;
+
+  virtual bool NoDBOpen() override { return false; }
+
+  virtual Options PrepareOptionsForOpenDB() override;
+
+  static void Help(std::string& ret);
+
+ private:
+  std::string output_sst_path_;
+};
+
+class IngestExternalSstFilesCommand : public LDBCommand {
+ public:
+  static std::string Name() { return "ingest_extern_sst"; }
+  IngestExternalSstFilesCommand(
+      const std::vector<std::string>& params,
+      const std::map<std::string, std::string>& options,
+      const std::vector<std::string>& flags);
+
+  virtual void DoCommand() override;
+
+  virtual bool NoDBOpen() override { return false; }
+
+  virtual Options PrepareOptionsForOpenDB() override;
+
+  static void Help(std::string& ret);
+
+ private:
+  std::string input_sst_path_;
+  bool move_files_;
+  bool snapshot_consistency_;
+  bool allow_global_seqno_;
+  bool allow_blocking_flush_;
+  bool ingest_behind_;
+
+  static const std::string ARG_MOVE_FILES;
+  static const std::string ARG_SNAPSHOT_CONSISTENCY;
+  static const std::string ARG_ALLOW_GLOBAL_SEQNO;
+  static const std::string ARG_ALLOW_BLOCKING_FLUSH;
+  static const std::string ARG_INGEST_BEHIND;
+};
+
 }  // namespace rocksdb

tools/ldb_test.py

@@ -76,7 +76,7 @@ class LDBTestCase(unittest.TestCase):
 
             my_check_output("./ldb %s >/dev/null 2>&1 |grep -v \"Created bg \
                 thread\"" % params, shell=True)
-        except Exception, e:
+        except Exception:
             return
         self.fail(
             "Exception should have been raised for command with params: %s" %
@@ -146,6 +146,14 @@ class LDBTestCase(unittest.TestCase):
     def loadDb(self, params, dumpFile):
         return 0 == run_err_null("cat %s | ./ldb load %s" % (dumpFile, params))
 
+    def writeExternSst(self, params, inputDumpFile, outputSst):
+        return 0 == run_err_null("cat %s | ./ldb write_extern_sst %s %s"
+                % (inputDumpFile, outputSst, params))
+
+    def ingestExternSst(self, params, inputSst):
+        return 0 == run_err_null("./ldb ingest_extern_sst %s %s"
+                                     % (inputSst, params))
+
     def testStringBatchPut(self):
         print "Running testStringBatchPut..."
         self.assertRunOK("batchput x1 y1 --create_if_missing", "OK")
@@ -547,5 +555,38 @@ class LDBTestCase(unittest.TestCase):
         # non-existing column family.
         self.assertRunFAIL("get cf3_1 --column_family=four")
 
+    def testIngestExternalSst(self):
+        print "Running testIngestExternalSst..."
+
+        # Dump, load, write external sst and ingest it in another db
+        dbPath = os.path.join(self.TMP_DIR, "db1")
+        self.assertRunOK(
+            "batchput --db=%s --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4"
+            % dbPath,
+            "OK")
+        self.assertRunOK("scan --db=%s" % dbPath,
+                         "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
+        with open(dumpFilePath, 'w') as f:
+            f.write("x1 ==> y10\nx2 ==> y20\nx3 ==> y30\nx4 ==> y40")
+        externSstPath = os.path.join(self.TMP_DIR, "extern_data1.sst")
+        self.assertTrue(self.writeExternSst("--create_if_missing --db=%s"
+                            % dbPath,
+                        dumpFilePath,
+                        externSstPath))
+        # cannot ingest if allow_global_seqno is false
+        self.assertFalse(
+            self.ingestExternSst(
+                "--create_if_missing --allow_global_seqno=false --db=%s"
+                % dbPath,
+                externSstPath))
+        self.assertTrue(
+            self.ingestExternSst(
+                "--create_if_missing --allow_global_seqno --db=%s"
+                % dbPath,
+                externSstPath))
+        self.assertRunOKFull("scan --db=%s" % dbPath,
+                             "x1 : y10\nx2 : y20\nx3 : y30\nx4 : y40")
+
 if __name__ == "__main__":
     unittest.main()

tools/ldb_tool.cc

@@ -88,6 +88,8 @@ void LDBCommandRunner::PrintHelp(const LDBOptions& ldb_options,
   BackupCommand::Help(ret);
   RestoreCommand::Help(ret);
   CheckPointCommand::Help(ret);
+  WriteExternalSstFilesCommand::Help(ret);
+  IngestExternalSstFilesCommand::Help(ret);
 
   fprintf(stderr, "%s\n", ret.c_str());
 }

util/status.cc

@@ -9,25 +9,27 @@
 
 #include "rocksdb/status.h"
 #include <stdio.h>
+#ifdef OS_WIN
+#include <string.h>
+#endif
 #include <cstring>
 #include "port/port.h"
 
 namespace rocksdb {
 
 const char* Status::CopyState(const char* state) {
-  const size_t cch =
-      std::strlen(state) + 1; // +1 for the null terminator
-  char* const result =
-      new char[cch];
-  result[cch - 1] = '\0';
 #ifdef OS_WIN
+  const size_t cch = std::strlen(state) + 1;  // +1 for the null terminator
+  char* result = new char[cch];
   errno_t ret;
   ret = strncpy_s(result, cch, state, cch - 1);
+  result[cch - 1] = '\0';
   assert(ret == 0);
-#else
-  std::strncpy(result, state, cch - 1);
-#endif
   return result;
+#else
+  const size_t cch = std::strlen(state) + 1;  // +1 for the null terminator
+  return std::strncpy(new char[cch], state, cch);
+#endif
 }
 
 Status::Status(Code _code, SubCode _subcode, const Slice& msg, const Slice& msg2)