diff --git a/db/dbformat.cc b/db/dbformat.cc
index baa1c9114..cf606a5c3 100644
--- a/db/dbformat.cc
+++ b/db/dbformat.cc
@@ -55,7 +55,7 @@ void AppendInternalKeyFooter(std::string* result, SequenceNumber s,
 
 std::string ParsedInternalKey::DebugString(bool hex) const {
   char buf[50];
-  snprintf(buf, sizeof(buf), "' @ %" PRIu64 ": %d", sequence,
+  snprintf(buf, sizeof(buf), "' seq:%" PRIu64 ", type:%d", sequence,
            static_cast<int>(type));
   std::string result = "'";
   result += user_key.ToString(hex);
diff --git a/tools/ldb_test.py b/tools/ldb_test.py
index f4899587d..bbcdc18e1 100644
--- a/tools/ldb_test.py
+++ b/tools/ldb_test.py
@@ -426,7 +426,7 @@ class LDBTestCase(unittest.TestCase):
         # Pattern to expect from manifest_dump.
         num = "[0-9]+"
         st = ".*"
-        subpat = st + " @ " + num + ": " + num
+        subpat = st + " seq:" + num + ", type:" + num
         regex = num + ":" + num + "\[" + subpat + ".." + subpat + "\]"
         expected_pattern = re.compile(regex)
         cmd = "manifest_dump --db=%s"
diff --git a/tools/sst_dump_tool.cc b/tools/sst_dump_tool.cc
index cd5564fed..eea61af95 100644
--- a/tools/sst_dump_tool.cc
+++ b/tools/sst_dump_tool.cc
@@ -280,12 +280,10 @@ Status SstFileReader::SetOldTableOptions() {
   return Status::OK();
 }
 
-Status SstFileReader::ReadSequential(bool print_kv,
-                                     uint64_t read_num,
-                                     bool has_from,
-                                     const std::string& from_key,
-                                     bool has_to,
-                                     const std::string& to_key) {
+Status SstFileReader::ReadSequential(bool print_kv, uint64_t read_num,
+                                     bool has_from, const std::string& from_key,
+                                     bool has_to, const std::string& to_key,
+                                     bool use_from_as_prefix) {
   if (!table_reader_) {
     return init_result_;
   }
@@ -315,6 +313,11 @@ Status SstFileReader::ReadSequential(bool print_kv,
       continue;
     }
 
+    // the key returned is not prefixed with out 'from' key
+    if (use_from_as_prefix && !ikey.user_key.starts_with(from_key)) {
+      break;
+    }
+
     // If end marker was specified, we stop before it
     if (has_to && BytewiseComparator()->Compare(ikey.user_key, to_key) >= 0) {
       break;
@@ -366,6 +369,10 @@ void print_help() {
     --to=<user_key>
       Key to stop reading at when executing check|scan
 
+    --prefix=<user_key>
+      Returns all keys with this prefix when executing check|scan
+      Cannot be used in conjunction with --from
+
     --read_num=<num>
       Maximum number of entries to read when executing check|scan
 
@@ -406,6 +413,7 @@ int SSTDumpTool::Run(int argc, char** argv) {
   bool input_key_hex = false;
   bool has_from = false;
   bool has_to = false;
+  bool use_from_as_prefix = false;
   bool show_properties = false;
   bool show_compression_sizes = false;
   bool show_summary = false;
@@ -440,6 +448,9 @@ int SSTDumpTool::Run(int argc, char** argv) {
     } else if (strncmp(argv[i], "--to=", 5) == 0) {
       to_key = argv[i] + 5;
       has_to = true;
+    } else if (strncmp(argv[i], "--prefix=", 9) == 0) {
+      from_key = argv[i] + 9;
+      use_from_as_prefix = true;
     } else if (strcmp(argv[i], "--show_properties") == 0) {
       show_properties = true;
     } else if (strcmp(argv[i], "--show_compression_sizes") == 0) {
@@ -476,13 +487,19 @@ int SSTDumpTool::Run(int argc, char** argv) {
       fprintf(stdout, "key=%s\n", ikey.DebugString(true).c_str());
       return retc;
     } else {
+      fprintf(stderr, "Unrecognized argument '%s'\n\n", argv[i]);
       print_help();
       exit(1);
     }
   }
 
+  if (use_from_as_prefix && has_from) {
+    fprintf(stderr, "Cannot specify --prefix and --from\n\n");
+    exit(1);
+  }
+
   if (input_key_hex) {
-    if (has_from) {
+    if (has_from || use_from_as_prefix) {
       from_key = rocksdb::LDBCommand::HexToString(from_key);
     }
     if (has_to) {
@@ -491,6 +508,7 @@ int SSTDumpTool::Run(int argc, char** argv) {
   }
 
   if (dir_or_file == nullptr) {
+    fprintf(stderr, "file or directory must be specified.\n\n");
     print_help();
     exit(1);
   }
@@ -554,10 +572,10 @@ int SSTDumpTool::Run(int argc, char** argv) {
 
     // scan all files in give file path.
     if (command == "" || command == "scan" || command == "check") {
-      st = reader.ReadSequential(command == "scan",
-                                 read_num > 0 ? (read_num - total_read) :
-                                                read_num,
-                                 has_from, from_key, has_to, to_key);
+      st = reader.ReadSequential(
+          command == "scan", read_num > 0 ? (read_num - total_read) : read_num,
+          has_from || use_from_as_prefix, from_key, has_to, to_key,
+          use_from_as_prefix);
       if (!st.ok()) {
         fprintf(stderr, "%s: %s\n", filename.c_str(),
             st.ToString().c_str());
diff --git a/tools/sst_dump_tool_imp.h b/tools/sst_dump_tool_imp.h
index 0ec8a7fc7..f0ef04a80 100644
--- a/tools/sst_dump_tool_imp.h
+++ b/tools/sst_dump_tool_imp.h
@@ -22,7 +22,8 @@ class SstFileReader {
 
   Status ReadSequential(bool print_kv, uint64_t read_num, bool has_from,
                         const std::string& from_key, bool has_to,
-                        const std::string& to_key);
+                        const std::string& to_key,
+                        bool use_from_as_prefix = false);
 
   Status ReadTableProperties(
       std::shared_ptr<const TableProperties>* table_properties);