diff --git a/tools/check_format_compatible.sh b/tools/check_format_compatible.sh
new file mode 100755
index 000000000..65bbe0b90
--- /dev/null
+++ b/tools/check_format_compatible.sh
@@ -0,0 +1,115 @@
+#!/bin/bash
+#
+# A shell script to load some pre generated data file to a DB using ldb tool
+# ./ldb needs to be avaible to be executed.
+#
+# Usage: <SCRIPT> [checkout]
+# `checkout` can be a tag, commit or branch name. Will build using it and check DBs generated by all previous tags can be opened by it.
+# Return value 0 means all regression tests pass. 1 if not pass.
+
+scriptpath=`dirname $BASH_SOURCE`
+test_dir=${TEST_TMPDIR:-"/tmp"}"/format_compatible_check"
+script_copy_dir=$test_dir"/script_copy"
+input_data_path=$test_dir"/test_data_input/"
+
+mkdir $test_dir || true
+mkdir $input_data_path || true
+rm -rf $script_copy_dir
+cp $scriptpath $script_copy_dir -rf
+
+# Generate four random files.
+for i in {1..6}
+do
+  input_data[$i]=$input_data_path/data$i
+  echo == Generating random input file ${input_data[$i]}
+  python - <<EOF
+import random
+random.seed($i)
+symbols=['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
+with open('${input_data[$i]}', 'w') as f:
+  for i in range(1,1024):
+    k = ""
+    for j in range(1, random.randint(1,32)):
+      k=k + symbols[random.randint(0, len(symbols) - 1)]
+    vb = ""
+    for j in range(1, random.randint(0,128)):
+      vb = vb + symbols[random.randint(0, len(symbols) - 1)]
+    v = ""
+    for j in range(1, random.randint(1, 5)):
+      v = v + vb
+    print >> f, k + " ==> " + v
+EOF
+done
+
+# v2.1 or older doesn't pass the debug build but OK with release build
+declare -a need_release_tags=("v1.5.7" "v2.1")
+declare -a tags=("v2.5" "v2.4" "v2.3" "v2.2" "v2.8" "v3.0" "v3.1" "v3.2" "v3.3" "v3.4" "rocksdb-3.5.1" "rocksdb-3.6.2" "rocksdb-3.7" "rocksdb-3.8" "rocksdb-3.9" "v3.10")
+declare -a forward_compatible_tags=("rocksdb-3.8" "rocksdb-3.9" "v3.10")
+
+generate_db()
+{
+    set +e
+    $script_copy_dir/generate_random_db.sh $1 $2
+    if [ $? -ne 0 ]; then
+        echo ==== Error loading data from $2 to $1 ====
+        exit 1
+    fi
+    set -e
+}
+
+compare_db()
+{
+    set +e
+    $script_copy_dir/verify_random_db.sh $1 $2 $3
+    if [ $? -ne 0 ]; then
+        echo ==== Read different content from $1 and $2 or error happened. ====
+        exit 1
+    fi
+    set -e
+}
+
+set -e
+for tag in "${tags[@]}" "${need_release_tags[@]}"
+do
+   echo == Generating DB from "$tag" ...
+   git checkout $tag
+   make clean
+   make ldb -j32
+   generate_db $input_data_path $test_dir/$tag
+done
+
+checkout_flag=${1:-"master"}
+
+echo == Building $checkout_flag debug
+git checkout $checkout_flag
+make clean
+make ldb -j32
+compare_base_db_dir=$test_dir"/base_db_dir"
+echo == Generate compare base DB to $compare_base_db_dir
+generate_db $input_data_path $compare_base_db_dir
+
+for tag in "${tags[@]}"
+do
+   echo == Opening DB from "$tag" using debug build of $checkout_flag ...
+   compare_db $test_dir/$tag $compare_base_db_dir db_dump.txt
+done
+
+echo == Building $checkout_flag release
+git checkout $checkout_flag
+make release
+for tag in "${need_release_tags[@]}"
+do
+   echo == Opening DB generated by "$tag" using release build of $checkout_flag ...
+   compare_db $test_dir/$tag $compare_base_db_dir db_dump.txt
+done
+
+for tag in "${forward_compatible_tags[@]}"
+do
+   echo == Build "$tag" and try to open DB generated using $checkout_flag...
+   git checkout $tag
+   make clean
+   make ldb -j32
+   compare_db $test_dir/$tag $compare_base_db_dir forward_${tag}_dump.txt
+done
+
+echo ==== Compatibility Test PASSED ====
diff --git a/tools/generate_random_db.sh b/tools/generate_random_db.sh
new file mode 100755
index 000000000..28bdceb2b
--- /dev/null
+++ b/tools/generate_random_db.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# A shell script to load some pre generated data file to a DB using ldb tool
+# ./ldb needs to be avaible to be executed.
+#
+# Usage: <SCRIPT> <input_data_path> <DB Path>
+
+if [ "$#" -lt 2 ]; then
+  echo "usage: $BASH_SOURCE <input_data_path> <DB Path>"
+  exit 1
+fi
+
+input_data_dir=$1
+db_dir=$2
+rm -rf $db_dir
+
+echo == Loading data from $input_data_dir to $db_dir
+
+declare -a compression_opts=("no" "snappy" "zlib" "bzip2")
+
+set -e
+
+n=0
+
+for f in `ls -1 $input_data_dir`
+do
+  echo == Loading $f with compression ${compression_opts[n % 4]}
+  ./ldb load --db=$db_dir --compression_type=${compression_opts[n % 4]} --bloom_bits=10 --auto_compaction=false --create_if_missing < $input_data_dir/$f
+  let "n = n + 1"
+done
diff --git a/tools/verify_random_db.sh b/tools/verify_random_db.sh
new file mode 100755
index 000000000..77607b673
--- /dev/null
+++ b/tools/verify_random_db.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# A shell script to verify DB generated by generate_random_db.sh cannot opened and read correct data.
+# ./ldb needs to be avaible to be executed.
+#
+# Usage: <SCRIPT> <DB Path>
+
+scriptpath=`dirname $BASH_SOURCE`
+if [ "$#" -lt 2 ]; then
+  echo "usage: $BASH_SOURCE <db_directory> <compare_base_db_directory> [dump_file_name]"
+  exit 1
+fi
+
+db_dir=$1
+base_db_dir=$2
+dump_file_name=${3:-"dump_file.txt"}
+db_dump=$db_dir"/"$dump_file_name
+base_db_dump=$base_db_dir"/"$dump_file_name
+
+set -e
+echo == Dumping data from $db_dir to $db_dump
+./ldb dump --db=$db_dir > $db_dump
+
+echo == Dumping data from $base_db_dir to $base_db_dump
+./ldb dump --db=$base_db_dir > $base_db_dump
+
+diff $db_dump $base_db_dir