改变了get的实现方式，通过了测试例GetEarlierData

db/builder.cc

@@ -47,11 +47,14 @@ Status BuildTable(const std::string& dbname, Env* env, const Options& options,
       if(parsed.deadTime == 0) parsed.deadTime = UINT64_MAX;
       if(parsed.deadTime < nowTime) {
         static int count = 0;
-        if(count % 1000 == 0) {
+        if(count % 10 == 0) {
           std::cout<<"count "<<count++<<" drop dead in L0: "<<parsed.user_key.ToString()<<" "<<parsed.deadTime<<std::endl;
         }
         continue;
       }
+      if(parsed.user_key.ToString() == "16636") {
+        printf("specific insert %s deadtime %lu file num %lu\n",parsed.user_key.ToString().c_str(),parsed.deadTime,meta->number);
+      }
       meta->smallest_deadtime = std::min(meta->smallest_deadtime,parsed.deadTime);
       meta->largest_deadtime = std::max(meta->largest_deadtime,parsed.deadTime);
     }

db/db_impl.cc

@@ -988,13 +988,26 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
       current_user_key.clear();
       has_current_user_key = false;
       last_sequence_for_key = kMaxSequenceNumber;
-    } else if(ikey.deadTime != 0 && ikey.deadTime < nowTime){
+    } else if(ikey.deadTime != 0){
+      if(ikey.user_key.ToString() == "16636") {
+        printf("in compaction:specific key %s deadtime %lu nowTime %lu\n",ikey.user_key.ToString().c_str(),ikey.deadTime,nowTime);
+      }
+      if(ikey.deadTime < nowTime){
         static int count = 0;
-        if(count % 1000 == 0) {
+        if(count % 10 == 0) {
           std::cout<<"count "<<count<<" drop dead in Compaction: "<<ikey.user_key.ToString()<<" "<<ikey.deadTime<<std::endl;
           count ++;
         }
         drop = true;
+      } 
+      else {
+        static int count1 = 0;
+        if(count1 % 10 == 0) {
+          std::cout<<"count "<<count1<<" keep key with deadtime: "<<ikey.user_key.ToString()<<" "<<ikey.deadTime<<std::endl;
+          count1 ++;
+        }
+        drop = false;
+      }
     } else {
       if (!has_current_user_key ||
           user_comparator()->Compare(ikey.user_key, Slice(current_user_key)) !=
@@ -1053,6 +1066,9 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
       }
       smallest_deadtime = std::min(smallest_deadtime,parsed.deadTime);
       largest_deadtime = std::max(largest_deadtime,parsed.deadTime);
+      if(parsed.user_key == "16636")
+        printf("in compaction:keep specific key %s deadtime %lu nowTime %lu\n",
+          parsed.user_key.ToString().c_str(),parsed.deadTime,nowTime);
       
       compact->builder->Add(key, input->value());
 

db/memtable.cc

@@ -140,6 +140,7 @@ bool MemTable::Get(const LookupKey& key, std::string* value, Status* s) {
   Slice memkey = key.memtable_key();
   Table::Iterator iter(&table_);
   iter.Seek(memkey.data());
+  auto user_comparator = comparator_.comparator.user_comparator();
   while(iter.Valid()) {
     Slice now = GetLengthPrefixedSlice(iter.key()); //迭代器所处的位置
     MemTable::KeyComparator comp_ = iter.get_comparator();
@@ -151,7 +152,10 @@ bool MemTable::Get(const LookupKey& key, std::string* value, Status* s) {
     if(deadtime_k == 0) deadtime_k = UINT64_MAX;
     if(deadtime_now == 0) deadtime_now = UINT64_MAX;
     std::cout<<"key :"<<parsed_k.user_key.ToString()<<" k time: "<<deadtime_k<<" now time: "<<deadtime_now<<std::endl;
-    std::cout<<"k&now"<<parsed_k.user_key.ToString()<<" "<<parsed_now.user_key.ToString()<<std::endl;
+    std::cout<<"k&now "<<parsed_k.user_key.ToString()<<" "<<parsed_now.user_key.ToString()<<std::endl;
+    if(user_comparator->Compare(parsed_k.user_key,parsed_now.user_key) < 0) {
+      break;
+    }
     if(deadtime_k > deadtime_now) {
       iter.Next();
       continue;

db/version_set.cc

@@ -83,11 +83,15 @@ Version::~Version() {
     }
   }
 }
-
+//寻找文件的时候也要考虑生存期
 int FindFile(const InternalKeyComparator& icmp,
              const std::vector<FileMetaData*>& files, const Slice& key) {
   uint32_t left = 0;
   uint32_t right = files.size();
+
+  ParsedInternalKey parsed;
+  ParseInternalKey(key,&parsed);
+  
   while (left < right) {
     uint32_t mid = (left + right) / 2;
     const FileMetaData* f = files[mid];
@@ -101,6 +105,19 @@ int FindFile(const InternalKeyComparator& icmp,
       right = mid;
     }
   }
+
+  while(right < files.size()) {
+    printf("file ind %d num %d largest deadtime %d parsed deadtime %d\n",
+    right,files[right]->number,files[right]->largest_deadtime,parsed.deadTime);
+    if(files[right]->largest_deadtime >= parsed.deadTime) {
+      break;
+    }
+    // if(icmp.InternalKeyComparator::Compare(files[right]->largest.Encode(), key) > 0) {
+    //   break;
+    // }
+    right ++;
+  }
+
   return right;
 }
 
@@ -266,7 +283,7 @@ static void SaveValue(void* arg, const Slice& ikey, const Slice& v) {
     // std::cout<<"corrupt get"<<std::endl;
     s->state = kCorrupt;
   } else {
-    std::cout<<"tar&found"<<parsed_key.user_key.ToString()<<" "<<s->user_key.ToString()<<std::endl;
+    std::cout<<"found & target "<<parsed_key.user_key.ToString()<<" "<<s->user_key.ToString()<<std::endl;
     if (s->ucmp->Compare(parsed_key.user_key, s->user_key) == 0) {
       s->state = (parsed_key.type == kTypeValue) ? kFound : kDeleted;
       if (s->state == kFound) {
@@ -284,14 +301,18 @@ static bool NewestFirst(FileMetaData* a, FileMetaData* b) {
 void Version::ForEachOverlapping(Slice user_key, Slice internal_key, void* arg,
                                  bool (*func)(void*, int, FileMetaData*)) {
   const Comparator* ucmp = vset_->icmp_.user_comparator();
-
+  ParsedInternalKey parsed;
+  ParseInternalKey(internal_key,&parsed);
+  printf("parsed lookup deadtime : %d\n",parsed.deadTime);
   // Search level-0 in order from newest to oldest.
   std::vector<FileMetaData*> tmp;
   tmp.reserve(files_[0].size());
   for (uint32_t i = 0; i < files_[0].size(); i++) {
     FileMetaData* f = files_[0][i];
+    //除了key的范围之外，还要考虑文件含有kv的最大deadtime
     if (ucmp->Compare(user_key, f->smallest.user_key()) >= 0 &&
-        ucmp->Compare(user_key, f->largest.user_key()) <= 0) {
+        ucmp->Compare(user_key, f->largest.user_key()) <= 0 && 
+        f->largest_deadtime > parsed.deadTime) {
       tmp.push_back(f);
     }
   }
@@ -306,6 +327,7 @@ void Version::ForEachOverlapping(Slice user_key, Slice internal_key, void* arg,
 
   // Search other levels.
   for (int level = 1; level < config::kNumLevels; level++) {
+    std::cout<<"----------search in level "<<level<<"--------------\n";
     size_t num_files = files_[level].size();
     if (num_files == 0) continue;
 
@@ -313,6 +335,7 @@ void Version::ForEachOverlapping(Slice user_key, Slice internal_key, void* arg,
     uint32_t index = FindFile(vset_->icmp_, files_[level], internal_key);
     if (index < num_files) {
       FileMetaData* f = files_[level][index];
+      std::cout<<"userkey fsmallest "<<user_key.ToString()<<" "<<f->smallest.user_key().ToString()<<std::endl;
       if (ucmp->Compare(user_key, f->smallest.user_key()) < 0) {
         // All of "f" is past any data for user_key
       } else {
@@ -357,6 +380,8 @@ Status Version::Get(const ReadOptions& options, const LookupKey& k,
       state->s = state->vset->table_cache_->Get(*state->options, f->number,
                                                 f->file_size, state->ikey,
                                                 &state->saver, SaveValue);
+      printf("file level %d num %d\n",level,f->number);
+      std::cout<<"state->s ->saver.state: "<<state->s.ok()<<" "<<state->saver.state<<std::endl;
       if (!state->s.ok()) {
         state->found = true;
         return false;

db/write_batch.cc

@@ -125,6 +125,7 @@ void WriteBatch::Put(const Slice& key, const Slice& value, uint64_t ttl) {
       assert(nowTime > 0);
       assert(ttl > 0);
       uint64_t deadTime = static_cast<uint64_t>(nowTime) + ttl;
+      // std::cout<<"now and dead time : "<<nowTime<<" "<<deadTime<<std::endl;
       PutFixed64(&rep_, deadTime);
   }
 

table/block.cc

@@ -222,15 +222,16 @@ class Block::Iter : public Iterator {
       if (!ParseNextKey()) {
         return;
       }
-      ParsedInternalKey parsed_target,parsed_key_;
-      ParseInternalKey(target,&parsed_target);
-      ParseInternalKey(key_,&parsed_key_);
-      uint64_t deadtime_tar = parsed_target.deadTime;
-      uint64_t deadtime_key_ = parsed_key_.deadTime;
-      if(deadtime_tar == 0) deadtime_tar = UINT64_MAX;
-      if(deadtime_key_ == 0) deadtime_key_ = UINT64_MAX;
-      std::cout<<"key :"<<parsed_target.user_key.ToString()<<" tar time: "<<deadtime_tar<<" key time: "<<deadtime_key_<<std::endl;
-      if(deadtime_tar > deadtime_key_) continue;
+      // ParsedInternalKey parsed_target,parsed_key_;
+      // ParseInternalKey(target,&parsed_target);
+      // ParseInternalKey(key_,&parsed_key_);
+      // uint64_t deadtime_tar = parsed_target.deadTime;
+      // uint64_t deadtime_key_ = parsed_key_.deadTime;
+      // if(deadtime_tar == 0) deadtime_tar = UINT64_MAX;
+      // if(deadtime_key_ == 0) deadtime_key_ = UINT64_MAX;
+      // std::cout<<"target key :"<<parsed_target.user_key.ToString()<<" now key: "<<parsed_key_.user_key.ToString()
+      // <<" tar time: "<<deadtime_tar<<" now time: "<<deadtime_key_<<std::endl;
+      // if(deadtime_tar > deadtime_key_) continue;
       if (Compare(key_, target) >= 0) {
         return;
       }

table/table.cc

@@ -14,7 +14,8 @@
 #include "table/format.h"
 #include "table/two_level_iterator.h"
 #include "util/coding.h"
-
+#include "db/dbformat.h"
+#include <iostream>
 namespace leveldb {
 
 struct Table::Rep {
@@ -216,6 +217,10 @@ Status Table::InternalGet(const ReadOptions& options, const Slice& k, void* arg,
                                                 const Slice&)) {
   Status s;
   Iterator* iiter = rep_->index_block->NewIterator(rep_->options.comparator);
+  // const Comparator *comparator = rep_->options.comparator;
+  const InternalKeyComparator *comparator = static_cast<const InternalKeyComparator *>(rep_->options.comparator);
+  const Comparator *user_comparator = comparator->user_comparator();
+  std::cout<<"-----------iter on index-------------\n";
   iiter->Seek(k);
   if (iiter->Valid()) {
     Slice handle_value = iiter->value();
@@ -225,13 +230,52 @@ Status Table::InternalGet(const ReadOptions& options, const Slice& k, void* arg,
         !filter->KeyMayMatch(handle.offset(), k)) {
       // Not found
     } else {
-      Iterator* block_iter = BlockReader(this, options, iiter->value());
-      block_iter->Seek(k);
-      if (block_iter->Valid()) {
-        (*handle_result)(arg, block_iter->key(), block_iter->value());
+      // Iterator* block_iter = BlockReader(this, options, iiter->value());
+      std::cout<<"-----------iter on data-------------\n";
+      // block_iter->Seek(k);
+      // if (block_iter->Valid()) {
+      //   (*handle_result)(arg, block_iter->key(), block_iter->value());
+      // }
+      // s = block_iter->status();
+      // delete block_iter;
+      bool found = false;
+      while(iiter->Valid()) {
+      std::cout<<"-----------iter on new block-------------\n";
+        Iterator* block_iter = BlockReader(this,options,iiter->value());
+        block_iter->Seek(k);
+        ParsedInternalKey target,now;
+        ParseInternalKey(k,&target);
+        ParseInternalKey(block_iter->key(),&now);
+        if(user_comparator->Compare(target.user_key,now.user_key) < 0) {          
+          std::cout<<"target key :"<<target.user_key.ToString()<<" now key: "<<now.user_key.ToString()
+          <<" tar time: "<<target.deadTime<<" now time: "<<now.deadTime<<std::endl;
+          // (*handle_result)(arg,block_iter->key(),block_iter->value());
+          delete block_iter;
+          break;
+        }
+        while(block_iter->Valid()) {
+          ParseInternalKey(block_iter->key(),&now);
+          std::cout<<"target key :"<<target.user_key.ToString()<<" now key: "<<now.user_key.ToString()
+          <<" tar time: "<<target.deadTime<<" now time: "<<now.deadTime<<std::endl;
+          if(target.deadTime > now.deadTime) {
+            block_iter->Next();
+            continue;
+          }
+          if(user_comparator->Compare(target.user_key,now.user_key) < 0) {
+            break;
+          }
+          (*handle_result)(arg,block_iter->key(),block_iter->value());
+          found = true;
+          break;
+          // block_iter->Next();
+        }
+
+        s = block_iter->status();
+        delete block_iter;
+        if(found) break;
+        iiter->Next();
       }
-      s = block_iter->status();
-      delete block_iter;
+
     }
   }
   if (s.ok()) {

test/ttl_test.cc

@@ -91,11 +91,12 @@ TEST(TestTTL, GetEarlierData) {
       abort();
   }
 
-  uint64_t ttl1 = 3;
-  uint64_t ttl2 = 5;
+  uint64_t ttl1 = 15;
+  uint64_t ttl2 = 115;
   uint64_t extra_size = 1;
 
   InsertData(db, ttl2);
+  // sleep(1);
   InsertData(db, ttl1, extra_size); //后一个数据长度变化一下
 
   //都没过期先找到后插的
@@ -112,9 +113,9 @@ TEST(TestTTL, GetEarlierData) {
         ASSERT_TRUE(status.ok());
         ASSERT_EQ(value.size(), value_size + extra_size);
     }
-  
   //再找到前一次
-  Env::Default()->SleepForMicroseconds(3 * 1000000);
+  Env::Default()->SleepForMicroseconds(ttl1 * 1000000);
+  // db->CompactRange(nullptr,nullptr);
   for (int i = 0; i < 100; i++) {
         int key_ = rand() % key_num+1;
         std::string key = std::to_string(key_);