diff --git a/CMakeLists.txt b/CMakeLists.txt
index 209cc1cba..a4a50dba5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,7 @@ set(SOURCES
         db/builder.cc
         db/c.cc
         db/column_family.cc
+        db/compacted_db_impl.cc
         db/compaction.cc
         db/compaction_job.cc
         db/compaction_picker.cc
@@ -202,7 +203,6 @@ set(SOURCES
         util/xxhash.cc
         utilities/backupable/backupable_db.cc
         utilities/checkpoint/checkpoint.cc
-        utilities/compacted_db/compacted_db_impl.cc
         utilities/document/document_db.cc
         utilities/document/json_document.cc
         utilities/document/json_document_builder.cc
@@ -215,8 +215,8 @@ set(SOURCES
         utilities/merge_operators/uint64add.cc
         utilities/redis/redis_lists.cc
         utilities/spatialdb/spatial_db.cc
+        utilities/transactions/optimistic_transaction_impl.cc        
         utilities/transactions/optimistic_transaction_db_impl.cc
-        utilities/transactions/optimistic_transaction_impl.cc
         utilities/ttl/db_ttl_impl.cc
         utilities/write_batch_with_index/write_batch_with_index.cc
         utilities/write_batch_with_index/write_batch_with_index_internal.cc
diff --git a/include/rocksdb/c.h b/include/rocksdb/c.h
index cf6f9d87b..b1f694609 100644
--- a/include/rocksdb/c.h
+++ b/include/rocksdb/c.h
@@ -46,7 +46,7 @@
 
 #pragma once
 
-#ifdef OS_WIN
+#ifdef _WIN32
 #ifdef ROCKSDB_DLL
 #ifdef ROCKSDB_LIBRARY_EXPORTS
 #define ROCKSDB_LIBRARY_API __declspec(dllexport)
diff --git a/include/rocksdb/db.h b/include/rocksdb/db.h
index e006fcc52..d11e95318 100644
--- a/include/rocksdb/db.h
+++ b/include/rocksdb/db.h
@@ -24,6 +24,12 @@
 #include "rocksdb/listener.h"
 #include "rocksdb/thread_status.h"
 
+#ifdef _WIN32
+// Windows API macro interference
+#undef DeleteFile
+#endif
+
+
 namespace rocksdb {
 
 struct Options;
@@ -431,7 +437,12 @@ class DB {
     return CompactRange(options, DefaultColumnFamily(), begin, end);
   }
 
-  __attribute__((deprecated)) virtual Status
+#if defined(__GNUC__) || defined(__clang__)
+  __attribute__((deprecated))
+#elif _WIN32
+  __declspec(deprecated)
+#endif
+   virtual Status
       CompactRange(ColumnFamilyHandle* column_family, const Slice* begin,
                    const Slice* end, bool change_level = false,
                    int target_level = -1, uint32_t target_path_id = 0) {
@@ -441,7 +452,12 @@ class DB {
     options.target_path_id = target_path_id;
     return CompactRange(options, column_family, begin, end);
   }
-  __attribute__((deprecated)) virtual Status
+#if defined(__GNUC__) || defined(__clang__)
+  __attribute__((deprecated))
+#elif _WIN32
+  __declspec(deprecated)
+#endif
+    virtual Status
       CompactRange(const Slice* begin, const Slice* end,
                    bool change_level = false, int target_level = -1,
                    uint32_t target_path_id = 0) {
diff --git a/include/rocksdb/env.h b/include/rocksdb/env.h
index fedfa8b56..684448e2a 100644
--- a/include/rocksdb/env.h
+++ b/include/rocksdb/env.h
@@ -26,7 +26,9 @@
 #include "rocksdb/status.h"
 #include "rocksdb/thread_status.h"
 
-#ifdef GetCurrentTime
+#ifdef _WIN32
+// Windows API macro interference
+#undef DeleteFile
 #undef GetCurrentTime
 #endif
 
@@ -163,7 +165,6 @@ class Env {
   virtual Status GetChildren(const std::string& dir,
                              std::vector<std::string>* result) = 0;
 
-#undef DeleteFile
   // Delete the named file.
   virtual Status DeleteFile(const std::string& fname) = 0;
 
@@ -650,27 +651,8 @@ class Logger {
   // and format.  Any log with level under the internal log level
   // of *this (see @SetInfoLogLevel and @GetInfoLogLevel) will not be
   // printed.
-  virtual void Logv(const InfoLogLevel log_level, const char* format, va_list ap) {
-    static const char* kInfoLogLevelNames[5] = {"DEBUG", "INFO", "WARN",
-                                                "ERROR", "FATAL"};
-    if (log_level < log_level_) {
-      return;
-    }
+  virtual void Logv(const InfoLogLevel log_level, const char* format, va_list ap);
 
-    if (log_level == InfoLogLevel::INFO_LEVEL) {
-      // Doesn't print log level if it is INFO level.
-      // This is to avoid unexpected performance regression after we add
-      // the feature of log level. All the logs before we add the feature
-      // are INFO level. We don't want to add extra costs to those existing
-      // logging.
-      Logv(format, ap);
-    } else {
-      char new_format[500];
-      snprintf(new_format, sizeof(new_format) - 1, "[%s] %s",
-               kInfoLogLevelNames[log_level], format);
-      Logv(new_format, ap);
-    }
-  }
   virtual size_t GetLogFileSize() const { return kDoNotSupportGetLogFileSize; }
   // Flush to the OS buffers
   virtual void Flush() {}
diff --git a/include/rocksdb/iostats_context.h b/include/rocksdb/iostats_context.h
index 8bb082f55..472a68257 100644
--- a/include/rocksdb/iostats_context.h
+++ b/include/rocksdb/iostats_context.h
@@ -44,7 +44,11 @@ struct IOStatsContext {
 };
 
 #ifndef IOS_CROSS_COMPILE
+# ifdef _WIN32
+extern __declspec(thread) IOStatsContext iostats_context;
+# else
 extern __thread IOStatsContext iostats_context;
+# endif
 #endif  // IOS_CROSS_COMPILE
 
 }  // namespace rocksdb
diff --git a/include/rocksdb/perf_context.h b/include/rocksdb/perf_context.h
index bdef04778..150393aa6 100644
--- a/include/rocksdb/perf_context.h
+++ b/include/rocksdb/perf_context.h
@@ -87,6 +87,8 @@ struct PerfContext {
 
 #if defined(NPERF_CONTEXT) || defined(IOS_CROSS_COMPILE)
 extern PerfContext perf_context;
+#elif _WIN32
+extern __declspec(thread) PerfContext perf_context;
 #else
 extern __thread PerfContext perf_context;
 #endif
diff --git a/include/rocksdb/utilities/stackable_db.h b/include/rocksdb/utilities/stackable_db.h
index 6d39c99c5..6771d3c3c 100644
--- a/include/rocksdb/utilities/stackable_db.h
+++ b/include/rocksdb/utilities/stackable_db.h
@@ -6,6 +6,12 @@
 #include <string>
 #include "rocksdb/db.h"
 
+#ifdef _WIN32
+// Windows API macro interference
+#undef DeleteFile
+#endif
+
+
 namespace rocksdb {
 
 // This class contains APIs to stack rocksdb wrappers.Eg. Stack TTL over base d
diff --git a/include/rocksdb/utilities/utility_db.h b/include/rocksdb/utilities/utility_db.h
index f4db66532..a34a63898 100644
--- a/include/rocksdb/utilities/utility_db.h
+++ b/include/rocksdb/utilities/utility_db.h
@@ -19,7 +19,12 @@ class UtilityDB {
   // This function is here only for backwards compatibility. Please use the
   // functions defined in DBWithTTl (rocksdb/utilities/db_ttl.h)
   // (deprecated)
-  __attribute__((deprecated)) static Status OpenTtlDB(const Options& options,
+#if defined(__GNUC__) || defined(__clang__)
+  __attribute__((deprecated))
+#elif _WIN32
+   __declspec(deprecated)
+#endif
+    static Status OpenTtlDB(const Options& options,
                                                       const std::string& name,
                                                       StackableDB** dbptr,
                                                       int32_t ttl = 0,
diff --git a/include/utilities/pragma_error.h b/include/utilities/pragma_error.h
index c9f1853bb..53cde1000 100644
--- a/include/utilities/pragma_error.h
+++ b/include/utilities/pragma_error.h
@@ -18,7 +18,7 @@
 
 #define ROCKSDB_WARNING(x) _Pragma(RDB_STR(GCC warning x))
 
-#elif defined(OS_WIN)
+#elif defined(_WIN32)
 
 // Wrap unportable warning macro
 #if defined(_MSC_VER)
diff --git a/port/win/port_win.h b/port/win/port_win.h
index a0086c6aa..98b15073f 100644
--- a/port/win/port_win.h
+++ b/port/win/port_win.h
@@ -31,6 +31,12 @@
 
 #include "rocksdb/options.h"
 
+#undef min
+#undef max
+#undef DeleteFile
+#undef GetCurrentTime
+
+
 #ifndef strcasecmp
 #define strcasecmp _stricmp
 #endif
@@ -40,12 +46,17 @@
 #define snprintf _snprintf
 #endif
 
+#undef GetCurrentTime
+#undef DeleteFile
+
 typedef SSIZE_T ssize_t;
 
 // size_t printf formatting named in the manner of C99 standard formatting
 // strings such as PRIu64
 // in fact, we could use that one
+#ifndef ROCKSDB_PRIszt
 #define ROCKSDB_PRIszt "Iu"
+#endif
 
 #define __attribute__(A)
 
@@ -68,7 +79,9 @@ typedef SSIZE_T ssize_t;
 
 // Thread local storage on Linux
 // There is thread_local in C++11
+#ifndef __thread
 #define __thread __declspec(thread)
+#endif
 
 #ifndef PLATFORM_IS_LITTLE_ENDIAN
 #define PLATFORM_IS_LITTLE_ENDIAN (__BYTE_ORDER == __LITTLE_ENDIAN)
diff --git a/table/adaptive_table_factory.cc b/table/adaptive_table_factory.cc
index dcc84061f..e8831f757 100644
--- a/table/adaptive_table_factory.cc
+++ b/table/adaptive_table_factory.cc
@@ -6,6 +6,7 @@
 #include "table/adaptive_table_factory.h"
 
 #include "table/format.h"
+#include "port/port.h"
 
 namespace rocksdb {
 
diff --git a/util/db_test_util.h b/util/db_test_util.h
index c96d5394b..2b7dd94d0 100644
--- a/util/db_test_util.h
+++ b/util/db_test_util.h
@@ -14,7 +14,9 @@
 
 #include <fcntl.h>
 #include <inttypes.h>
+#ifndef OS_WIN
 #include <unistd.h>
+#endif
 
 #include <algorithm>
 #include <set>
@@ -36,7 +38,7 @@
 #include "rocksdb/slice.h"
 #include "rocksdb/table.h"
 #include "rocksdb/utilities/checkpoint.h"
-#include "rocksdb/utilities/convenience.h"
+#include "rocksdb/convenience.h"
 #include "table/block_based_table_factory.h"
 #include "table/mock_table.h"
 #include "table/plain_table_factory.h"
diff --git a/util/env.cc b/util/env.cc
index 9da6fe1b1..be1d9cd76 100644
--- a/util/env.cc
+++ b/util/env.cc
@@ -10,7 +10,9 @@
 #include "rocksdb/env.h"
 
 #include <thread>
+#include "port/port.h"
 #include "port/sys_time.h"
+#include "port/port.h"
 
 #include "rocksdb/options.h"
 #include "util/arena.h"
@@ -56,6 +58,29 @@ void Log(Logger* info_log, const char* format, ...) {
   }
 }
 
+void Logger::Logv(const InfoLogLevel log_level, const char* format, va_list ap) {
+  static const char* kInfoLogLevelNames[5] = { "DEBUG", "INFO", "WARN",
+    "ERROR", "FATAL" };
+  if (log_level < log_level_) {
+    return;
+  }
+
+  if (log_level == InfoLogLevel::INFO_LEVEL) {
+    // Doesn't print log level if it is INFO level.
+    // This is to avoid unexpected performance regression after we add
+    // the feature of log level. All the logs before we add the feature
+    // are INFO level. We don't want to add extra costs to those existing
+    // logging.
+    Logv(format, ap);
+  } else {
+    char new_format[500];
+    snprintf(new_format, sizeof(new_format) - 1, "[%s] %s",
+      kInfoLogLevelNames[log_level], format);
+    Logv(new_format, ap);
+  }
+}
+
+
 void Log(const InfoLogLevel log_level, Logger* info_log, const char* format,
          ...) {
   if (info_log && info_log->GetInfoLogLevel() <= log_level) {
diff --git a/util/iostats_context.cc b/util/iostats_context.cc
index 87c7a47ae..7e7c70a58 100644
--- a/util/iostats_context.cc
+++ b/util/iostats_context.cc
@@ -10,7 +10,11 @@
 namespace rocksdb {
 
 #ifndef IOS_CROSS_COMPILE
+# ifdef _WIN32
+__declspec(thread) IOStatsContext iostats_context;
+# else
 __thread IOStatsContext iostats_context;
+# endif
 #endif  // IOS_CROSS_COMPILE
 
 void IOStatsContext::Reset() {
diff --git a/util/manual_compaction_test.cc b/util/manual_compaction_test.cc
index 12c7486a3..8613b7b36 100644
--- a/util/manual_compaction_test.cc
+++ b/util/manual_compaction_test.cc
@@ -13,6 +13,7 @@
 #include "rocksdb/slice.h"
 #include "rocksdb/write_batch.h"
 #include "util/testharness.h"
+#include "port/port.h"
 
 using namespace rocksdb;
 
diff --git a/util/perf_context.cc b/util/perf_context.cc
index 643b3f004..9c3fd2029 100644
--- a/util/perf_context.cc
+++ b/util/perf_context.cc
@@ -10,10 +10,11 @@
 namespace rocksdb {
 
 #if defined(NPERF_CONTEXT) || defined(IOS_CROSS_COMPILE)
-// This is a dummy variable since some place references it
-PerfContext perf_context;
+  PerfContext perf_context;
+#elif _WIN32
+  __declspec(thread) PerfContext perf_context;
 #else
-__thread PerfContext perf_context;
+  __thread PerfContext perf_context;
 #endif
 
 void PerfContext::Reset() {
diff --git a/utilities/backupable/backupable_db.cc b/utilities/backupable/backupable_db.cc
index e8fc0bfe9..6b8515159 100644
--- a/utilities/backupable/backupable_db.cc
+++ b/utilities/backupable/backupable_db.cc
@@ -35,6 +35,8 @@
 #include <thread>
 #include <unordered_map>
 #include <unordered_set>
+#include "port/port.h"
+
 
 namespace rocksdb {
 
diff --git a/utilities/ttl/db_ttl_impl.h b/utilities/ttl/db_ttl_impl.h
index 84444e91c..a96123d81 100644
--- a/utilities/ttl/db_ttl_impl.h
+++ b/utilities/ttl/db_ttl_impl.h
@@ -17,6 +17,12 @@
 #include "rocksdb/utilities/db_ttl.h"
 #include "db/db_impl.h"
 
+#ifdef _WIN32
+// Windows API macro interference
+#undef GetCurrentTime
+#endif
+
+
 namespace rocksdb {
 
 class DBWithTTLImpl : public DBWithTTL {