ttl in the end

db/db_impl.cc

@@ -924,6 +924,10 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
   bool has_current_user_key = false;
   SequenceNumber last_sequence_for_key = kMaxSequenceNumber;
   while (input->Valid() && !shutting_down_.load(std::memory_order_acquire)) {
+    auto x=input->value();
+    uint64_t ttl=*(uint64_t*)(x.data()+x.size()-sizeof(uint64_t));
+    time_t now = time(nullptr);
+    if(ttl < static_cast<uint64_t>(now))return;
     // Prioritize immutable compaction work
     if (has_imm_.load(std::memory_order_relaxed)) {
       const uint64_t imm_start = env_->NowMicros();

db/version_set.cc

@@ -266,9 +266,14 @@ static void SaveValue(void* arg, const Slice& ikey, const Slice& v) {
     s->state = kCorrupt;
   } else {
     if (s->ucmp->Compare(parsed_key.user_key, s->user_key) == 0) {
+      if(parsed_key.type == kTypeValue){
+        time_t now = time(nullptr);
+        uint64_t ttl=*(uint64_t*)(v.data()+v.size()-sizeof(uint64_t));
+        if(ttl < static_cast<uint64_t>(now))return;
+      }
       s->state = (parsed_key.type == kTypeValue) ? kFound : kDeleted;
       if (s->state == kFound) {
-        s->value->assign(v.data(), v.size());
+        s->value->assign(v.data(), v.size()-sizeof(uint64_t));
       }
     }
   }

test/db_test1.cc

@@ -0,0 +1,26 @@
+#include "leveldb/db.h"
+#include <iostream>
+
+using namespace std;
+using namespace leveldb;
+
+int main() {
+    DB* db = nullptr;
+    Options op;
+    op.create_if_missing = true;
+    Status status = DB::Open(op, "testdb", &db);
+    assert(status.ok());
+    db->Put(WriteOptions(), "001", "leveldb");
+    string s;
+    db->Get(ReadOptions(), "001", &s);
+    cout<<s<<endl;
+
+    db->Put(WriteOptions(), "002", "world");
+    string s1;
+    db->Delete(WriteOptions(), "002");
+    db->Get(ReadOptions(), "002", &s1);
+    cout<<s1<<endl;
+
+    delete db;
+    return 0;
+}

third_party/benchmark

@@ -1 +1 @@
-Subproject commit f7547e29ccaed7b64ef4f7495ecfff1c9f6f3d03
+Subproject commit d99cdd7356de97b3056684d6b511189778d8a247

third_party/googletest

@@ -1 +1 @@
-Subproject commit 662fe38e44900c007eccb65a5d2ea19df7bd520e
+Subproject commit 5ed21863955149a5a877a53d7d5045b6919090ed