data push valuelog until sstable

db/builder.cc

@@ -21,6 +21,7 @@ Status BuildTable(const std::string& dbname, Env* env, const Options& options,
   iter->SeekToFirst();
 
   std::string fname = TableFileName(dbname, meta->number);
+  std::string value_fname = ValueLogFileName(dbname, meta->valuelog_id);
   if (iter->Valid()) {
     WritableFile* file;
     s = env->NewWritableFile(fname, &file);
@@ -28,22 +29,36 @@ Status BuildTable(const std::string& dbname, Env* env, const Options& options,
       return s;
     }
 
-    {
-      auto tmp_value=iter->value();
-      if(tmp_value.data()[0]==(char)(0x01)){
-        tmp_value.remove_prefix(1);
-        assert(GetVarint64(&tmp_value,&meta->valuelog_id));
-      }
-      else meta->valuelog_id=0;
+    WritableFile* value_file;
+    s = env->NewWritableFile(value_fname, &value_file);
+    if (!s.ok()) {
+      return s;
     }
 
     TableBuilder* builder = new TableBuilder(options, file);
     meta->smallest.DecodeFrom(iter->key());
     Slice key;
+    uint64_t valuelog_offset=0;
     for (; iter->Valid(); iter->Next()) {
       key = iter->key();
-      builder->Add(key, iter->value());
+      Slice value=iter->value();
+      Slice new_value=value;
+      if(value.size()>100){
+        value.remove_prefix(1);
+        std::string buf;
+        value_file->Append(value);
+        buf+=(char)(0x01);
+        PutVarint64(&buf,meta->valuelog_id);
+        PutVarint64(&buf,valuelog_offset);
+        PutVarint64(&buf,value.size());
+        valuelog_offset+=value.size();
+        new_value=Slice(buf);
+      }
+      builder->Add(key, new_value);
     }
+    value_file->Flush();
+    value_file->Sync();
+    value_file->Close();
     if (!key.empty()) {
       meta->largest.DecodeFrom(key);
     }

db/db_impl.cc

@@ -518,6 +518,7 @@ Status DBImpl::WriteLevel0Table(MemTable* mem, VersionEdit* edit,
   const uint64_t start_micros = env_->NowMicros();
   FileMetaData meta;
   meta.number = versions_->NewFileNumber();
+  meta.valuelog_id = versions_->NewFileNumber();
   pending_outputs_.insert(meta.number);
   Iterator* iter = mem->NewIterator();
   Log(options_.info_log, "Level-0 table #%llu: started",
@@ -1092,14 +1093,6 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
   if (status.ok()) {
     status = input->status();
   }
-  //not completely correct, should be written in new function, related to removeabsol...
-  // if(status.ok()){
-  //   for(auto id:old_valuelog_ids){
-  //     auto valuelog_filename=ValueLogFileName(dbname_,id);
-  //     Status s=env_->RemoveFile(valuelog_filename);
-  //     assert(s.ok());
-  //   }
-  // }
   delete input;
   input = nullptr;
 
@@ -1314,7 +1307,6 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
   Writer* last_writer = &w;
   if (status.ok() && updates != nullptr) {  // nullptr batch is for compactions
     WriteBatch* write_batch = BuildBatchGroup(&last_writer);
-    WriteBatchInternal::ConverToValueLog(write_batch,this);
     WriteBatchInternal::SetSequence(write_batch, last_sequence + 1);
     last_sequence += WriteBatchInternal::Count(write_batch);
 
@@ -1480,7 +1472,6 @@ Status DBImpl::MakeRoomForWrite(bool force) {
         RecordBackgroundError(s);
       }
       delete logfile_;
-      addNewValueLog();
       logfile_ = lfile;
       logfile_number_ = new_log_number;
       log_ = new log::Writer(lfile);
@@ -1574,55 +1565,12 @@ void DBImpl::GetApproximateSizes(const Range* range, int n, uint64_t* sizes) {
 
   v->Unref();
 }
-std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> DBImpl::WriteValueLog(std::vector<Slice> values){
-  //lock
-  // std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> res;
-  // for(int i=0;i<values.size();i++){
-  //   int len=values[i].size();
-  //   valuelogfile_->Append(values[i]);
-  //   res.push_back({valuelogfile_number_,{valuelogfile_offset,len}});
-  //   valuelogfile_offset+=len;
-  // }
-  // //unlock
-  // valuelogfile_->Flush();
-  // return res;
-  std::string file_name_=ValueLogFileName(dbname_,valuelogfile_number_);
-  std::ofstream valueFile(file_name_, std::ios::app | std::ios::binary);
-  if (!valueFile.is_open()) {
-        assert(0);
-    }
-  uint64_t offset=valueFile.tellp();
-  std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> res;
-  for(int i=0;i<values.size();i++){
-    int len=values[i].size();
-    valueFile.write(values[i].data(),len);
-    res.push_back({valuelogfile_number_,{offset,len}});
-    offset+=len;
-  }
-  //unlock
-  valueFile.close();
-  return res;
-}
 void DBImpl::writeValueLogForCompaction(WritableFile* target_file,std::vector<Slice> values){
   for(int i=0;i<values.size();i++){
     target_file->Append(values[i]);
   }
 }
 
-void DBImpl::addNewValueLog(){
-  //lock
-  // if(valuelogfile_){
-  //   valuelogfile_->Sync();
-  //   valuelogfile_->Close();
-  //   delete valuelogfile_;
-  // }
-  valuelogfile_number_=versions_->NewFileNumber();
-  // valuelogfile_offset=0;
-  // std::string file_name_=ValueLogFileName(dbname_,valuelogfile_number_);
-  // env_->NewWritableFile(file_name_,&valuelogfile_);
-  //unlock
-}
-
 Status DBImpl::ReadValueLog(uint64_t file_id, uint64_t offset,uint64_t len,Slice* value){
   //lock_shared
   std::string file_name_=ValueLogFileName(dbname_,file_id);
@@ -1644,7 +1592,11 @@ Status DBImpl::ReadValueLog(uint64_t file_id, uint64_t offset,uint64_t len,Slice
 // can call if they wish
 Status DB::Put(const WriteOptions& opt, const Slice& key, const Slice& value) {
   WriteBatch batch;
-  batch.Put(key, value);
+  std::string buf;
+  buf+=(char)(0x00);
+  buf+=std::string(value.data(),value.size());
+  Slice new_value=Slice(buf);
+  batch.Put(key, new_value);
   return Write(opt, &batch);
 }
 
@@ -1678,7 +1630,6 @@ Status DB::Open(const Options& options, const std::string& dbname, DB** dbptr) {
       impl->log_ = new log::Writer(lfile);
       impl->mem_ = new MemTable(impl->internal_comparator_);
       impl->mem_->Ref();
-      impl->addNewValueLog();
     }
   }
   if (s.ok() && save_manifest) {

db/db_impl.h

@@ -63,9 +63,7 @@ class DBImpl : public DB {
   bool GetProperty(const Slice& property, std::string* value) override;
   void GetApproximateSizes(const Range* range, int n, uint64_t* sizes) override;
   void CompactRange(const Slice* begin, const Slice* end) override;
-  std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> WriteValueLog(std::vector<Slice> value)override;
   void writeValueLogForCompaction(WritableFile* target_file,std::vector<Slice> value);
-  void addNewValueLog()override EXCLUSIVE_LOCKS_REQUIRED(mutex_);;
   std::pair<WritableFile*,uint64_t> getNewValuelog();//use for compaction
   Status ReadValueLog(uint64_t file_id, uint64_t offset,uint64_t len,Slice* value)override;
 
@@ -199,10 +197,7 @@ class DBImpl : public DB {
   MemTable* imm_ GUARDED_BY(mutex_);  // Memtable being compacted
   std::atomic<bool> has_imm_;         // So bg thread can detect non-null imm_
   WritableFile* logfile_;
-  WritableFile* valuelogfile_;
-  int valuelogfile_offset=0;
   uint64_t logfile_number_;
-  uint64_t valuelogfile_number_;
   log::Writer* log_;
   std::map<uint64_t,uint64_t> oldvaluelog_ids;
   uint32_t seed_ GUARDED_BY(mutex_);  // For sampling.

db/write_batch.cc

@@ -127,38 +127,38 @@ class MemTableInserter : public WriteBatch::Handler {
     sequence_++;
   }
 };
-class ValueLogInserter : public WriteBatch::Handler {
-  public:
-  WriteBatch writeBatch_;
-  DB* db_;
-  ValueLogInserter(WriteBatch writeBatch,DB* db){
-    writeBatch_=writeBatch;
-    db_=db;
-  }
-
-  void Put(const Slice& key, const Slice& value) override {
-    Slice new_value;
-    std::string buf;
-    if(value.size()<100){
-      buf+=(char)(0x00);
-      buf.append(value.data(),value.size());
-    }
-    else{
-      buf+=(char)(0x01);
-      std::vector<Slice> v;
-      v.push_back(value);
-      auto res=db_->WriteValueLog(v);
-      PutVarint64(&buf,res[0].first);
-      PutVarint64(&buf,res[0].second.first);
-      PutVarint64(&buf,res[0].second.second);
-    }
-    new_value=Slice(buf);
-    writeBatch_.Put(key,new_value);  
-  }
-  void Delete(const Slice& key) override {
-    writeBatch_.Delete(key);
-  }
-};
+// class ValueLogInserter : public WriteBatch::Handler {
+//   public:
+//   WriteBatch writeBatch_;
+//   DB* db_;
+//   ValueLogInserter(WriteBatch writeBatch,DB* db){
+//     writeBatch_=writeBatch;
+//     db_=db;
+//   }
+
+//   void Put(const Slice& key, const Slice& value) override {
+//     Slice new_value;
+//     std::string buf;
+//     if(value.size()<100){
+//       buf+=(char)(0x00);
+//       buf.append(value.data(),value.size());
+//     }
+//     else{
+//       buf+=(char)(0x01);
+//       std::vector<Slice> v;
+//       v.push_back(value);
+//       auto res=db_->WriteValueLog(v);
+//       PutVarint64(&buf,res[0].first);
+//       PutVarint64(&buf,res[0].second.first);
+//       PutVarint64(&buf,res[0].second.second);
+//     }
+//     new_value=Slice(buf);
+//     writeBatch_.Put(key,new_value);  
+//   }
+//   void Delete(const Slice& key) override {
+//     writeBatch_.Delete(key);
+//   }
+// };
 }  // namespace
 
 Status WriteBatchInternal::InsertInto(const WriteBatch* b, MemTable* memtable) {
@@ -168,13 +168,6 @@ Status WriteBatchInternal::InsertInto(const WriteBatch* b, MemTable* memtable) {
   return b->Iterate(&inserter);
 }
 
-Status WriteBatchInternal::ConverToValueLog(WriteBatch* b,DB* db_){
-  ValueLogInserter inserter(WriteBatch(),db_);
-  auto res=b->Iterate(&inserter);
-  *b=inserter.writeBatch_;
-  return res;
-}
-
 void WriteBatchInternal::SetContents(WriteBatch* b, const Slice& contents) {
   assert(contents.size() >= kHeader);
   b->rep_.assign(contents.data(), contents.size());

db/write_batch_internal.h

@@ -37,8 +37,6 @@ class WriteBatchInternal {
 
   static Status InsertInto(const WriteBatch* batch, MemTable* memtable);
 
-  static Status ConverToValueLog(WriteBatch* batch,DB* db_);
-
   static void Append(WriteBatch* dst, const WriteBatch* src);
 };
 

include/leveldb/db.h

@@ -102,14 +102,6 @@ class LEVELDB_EXPORT DB {
   
   // virtual Status Get_keys_by_field(const ReadOptions& options, const Field field,std::vector<std::string> *keys);
 
-  virtual std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> WriteValueLog(std::vector<Slice> value){
-    assert(0);
-    std::vector<std::pair<uint64_t,std::pair<uint64_t,uint64_t>>> v;
-    return v;
-  }
-
-  virtual void addNewValueLog(){assert(0);}
-
   virtual Status ReadValueLog(uint64_t file_id, uint64_t offset,uint64_t len,Slice* value){
     assert(0);  // Not implemented
     return Status::Corruption("not imp");

test/test.cpp

@@ -10,8 +10,8 @@ using FieldArray=std::vector>;
 
 Status OpenDB(std::string dbName, DB **db) {
   Options options;
-  options.max_file_size=16*1024;
-  options.write_buffer_size=32*1024;
+  // options.max_file_size=16*1024;
+  // options.write_buffer_size=32*1024;
   options.create_if_missing = true;
   return DB::Open(options, dbName, db);
 }
@@ -90,12 +90,13 @@ TEST(Test, CheckGetFields) {
     DB *db;
     WriteOptions writeOptions;
     ReadOptions readOptions;
+    std::cout<<"!!!"<<std::endl;
     if(OpenDB("testdb_for_XOY", &db).ok() == false) {
         std::cerr << "open db failed" << std::endl;
         abort();
     }
     std::string key1 = "k_1";
-    
+    std::cout<<"!!!"<<std::endl;
     FieldArray fields1 = {
         {"name", "Customer#000000001"},
         {"address", "IVhzIApeRb"},