Revert "feat(BRM) MCOL-5555 Reduce a number of direct writes to BRM journal/tablelocks files" (#2972)

This reverts commit 02114b5b7c.

docs/StorageManagerMetaVersioning.md

@@ -1,37 +0,0 @@
-
-`Create meta version.`
-```mermaid
-sequenceDiagram
-    participant MetaVersionNew
-    participant StorageManager
-    participant S3Bucket
-    participant ControllerNode
-    StorageManager->>ControllerNode: Send command to freeze. (similar to readonly)
-    StorageManager->>MetaVersionNew: Create new meta version
-    StorageManager->>S3Bucket: Pack and put file with meta version on S3.
-    StorageManager->>ControllerNode: Send command to unfreeze.
-```
-
-`Regular work flow.`
-```mermaid
-sequenceDiagram
-    participant MetaVersion
-    participant StorageManager
-    participant S3Bucket
-    StorageManager->>S3Bucket: Request object from S3
-    S3Bucket->>StorageManager: Send object to worker node
-    StorageManager->>S3Bucket: Update and put new object on S3
-    StorageManager->>MetaVersion: Check object in meta version
-    StorageManager->>S3Bucket: Delete object if not in MetaVersion
-```
-
-`On rollback to version.`
-```mermaid
-sequenceDiagram
-    participant MetaVersion
-    participant StorageManager
-    participant S3Bucket
-    StorageManager->>S3Bucket: Request meta version.
-    S3Bucket->>StorageManager: Send meta version to worker node.
-    StorageManager->>MetaVersion: Unpack metaversion.
-```

versioning/BRM/brmtypes.cpp

@@ -444,40 +444,7 @@ void TableLockInfo::deserialize(istream& i)
   dbrootList.resize(dbrootListSize);
 
   for (uint32_t j = 0; j < dbrootListSize; j++)
-    i.read((char*)&dbrootList[j], sizeof(uint32_t));
+    i.read((char*)&dbrootList[j], 4);
-}
-
-uint32_t TableLockInfo::getInternalSize() const
-{
-  const uint32_t nameLen = ownerName.length();
-  const uint32_t dbrootListSize = dbrootList.size();
-  return (32 + sizeof(time_t) + nameLen + (dbrootListSize * sizeof(uint32_t)));
-}
-
-void TableLockInfo::serializeElement(char* buffer, const char* src, const uint32_t size, uint32_t& offset)
-{
-  std::memcpy(&buffer[offset], src, size);
-  offset += size;
-}
-
-void TableLockInfo::serialize(char* buffer, uint32_t& offset)
-{
-  const uint32_t nameLen = ownerName.length();
-  const uint32_t dbrootListSize = dbrootList.size();
-
-  serializeElement(buffer, (char*)&id, 8, offset);
-  serializeElement(buffer, (char*)&tableOID, 4, offset);
-  serializeElement(buffer, (char*)&ownerPID, 4, offset);
-  serializeElement(buffer, (char*)&state, 4, offset);
-  serializeElement(buffer, (char*)&ownerSessionID, 4, offset);
-  serializeElement(buffer, (char*)&ownerTxnID, 4, offset);
-  serializeElement(buffer, (char*)&creationTime, sizeof(time_t), offset);
-  serializeElement(buffer, (char*)&nameLen, 2, offset);
-  serializeElement(buffer, (char*)ownerName.c_str(), nameLen, offset);
-  serializeElement(buffer, (char*)&dbrootListSize, 2, offset);
-
-  for (uint32_t j = 0; j < dbrootListSize; j++)
-    serializeElement(buffer, (char*)&dbrootList[j], sizeof(uint32_t), offset);
 }
 
 void TableLockInfo::serialize(IDBDataFile* o) const

versioning/BRM/brmtypes.h

@@ -254,12 +254,7 @@ struct TableLockInfo : public messageqcpp::Serializeable
   EXPORT void deserialize(messageqcpp::ByteStream& bs);
   EXPORT void serialize(idbdatafile::IDBDataFile*) const;
   EXPORT void deserialize(idbdatafile::IDBDataFile*);
-  EXPORT void serialize(char* buffer, uint32_t& offset);
-  EXPORT uint32_t getInternalSize() const;
   bool operator<(const TableLockInfo&) const;
-
- private:
-  void serializeElement(char* buffer, const char* src, const uint32_t size, uint32_t& offset);
 };
 
 /// A Serializeable version of InlineLBIDRange

versioning/BRM/slavecomm.cpp

@@ -191,6 +191,7 @@ SlaveComm::SlaveComm()
   slave = std::make_unique<SlaveDBRMNode>();
 }
 
+
 void SlaveComm::stop()
 {
   die = true;
@@ -1927,8 +1928,7 @@ void SlaveComm::do_confirm()
   {
     if (!currentSaveFile)
     {
-      currentSaveFile.reset(
+      currentSaveFile.reset(IDBDataFile::open(IDBPolicy::getType(tmp.c_str(), IDBPolicy::WRITEENG), tmp.c_str(), "wb", 0));
-          IDBDataFile::open(IDBPolicy::getType(tmp.c_str(), IDBPolicy::WRITEENG), tmp.c_str(), "wb", 0));
     }
 
     if (currentSaveFile == NULL)
@@ -1951,8 +1951,7 @@ void SlaveComm::do_confirm()
     if (err < (int)relative.length())
     {
       ostringstream os;
-      os << "WorkerComm: currentfile write() returned " << err << " file pointer is "
+      os << "WorkerComm: currentfile write() returned " << err << " file pointer is " << currentSaveFile.get();
-         << currentSaveFile.get();
 
       if (err < 0)
         os << " errno: " << strerror(errno);
@@ -2183,16 +2182,11 @@ void SlaveComm::saveDelta()
 {
   try
   {
-    const uint32_t deltaLen = delta.length();
+    uint32_t len = delta.length();
-    const uint32_t bufferSize = sizeof(deltaLen) + deltaLen;
-    std::unique_ptr<char[]> buffer(new char[bufferSize]);
-    uint32_t offset = 0;
-    std::memcpy(&buffer[offset], (char*)&deltaLen, sizeof(deltaLen));
-    offset += sizeof(deltaLen);
-    std::memcpy(&buffer[offset], (char*)delta.buf(), deltaLen);
 
     journalh->seek(0, SEEK_END);
-    journalh->write((const char*)buffer.get(), bufferSize);
+    journalh->write((const char*)&len, sizeof(len));
+    journalh->write((const char*)delta.buf(), delta.length());
     journalh->flush();
     journalCount++;
   }
@@ -2332,3 +2326,4 @@ void SlaveComm::do_dmlReleaseLBIDRanges(ByteStream& msg)
 }
 
 }  // namespace BRM
+

versioning/BRM/tablelockserver.cpp

@@ -70,21 +70,14 @@ void TableLockServer::save()
   if (!out)
     throw runtime_error("TableLockServer::save():  could not open save file");
 
-  uint32_t bufferSize = 4;
+  out->write((char*)&count, 4);
-  for (const auto& lock : locks)
-    bufferSize += lock.second.getInternalSize();
-
-  std::unique_ptr<char[]> buffer(new char[bufferSize]);
-  uint32_t offset = 0;
-  std::memcpy(&buffer[offset], (char*)&count, 4);
-  offset += 4;
 
   for (it = locks.begin(); it != locks.end(); ++it)
   {
     if (!out)
       throw runtime_error("TableLockServer::save():  could not write save file");
 
-    it->second.serialize(buffer.get(), offset);
+    it->second.serialize(out.get());
   }
 }