diff --git a/services/backup/src/Reactors/server/SendLogReactor.h b/services/backup/src/Reactors/server/SendLogReactor.h
--- a/services/backup/src/Reactors/server/SendLogReactor.h
+++ b/services/backup/src/Reactors/server/SendLogReactor.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "LogItem.h"
 #include "ServerReadReactorBase.h"
 #include "ServiceBlobClient.h"
 
@@ -35,9 +36,7 @@
   std::string logID;
   std::string backupID;
   std::string hash;
-  // either the value itself which is a dump of a single operation (if
-  // `persistedInBlob` is false) or the holder to blob (if `persistedInBlob` is
-  // true)
+  std::string blobHolder;
   std::string value;
   std::mutex reactorStateMutex;
 
diff --git a/services/backup/src/Reactors/server/SendLogReactor.cpp b/services/backup/src/Reactors/server/SendLogReactor.cpp
--- a/services/backup/src/Reactors/server/SendLogReactor.cpp
+++ b/services/backup/src/Reactors/server/SendLogReactor.cpp
@@ -12,12 +12,12 @@
 namespace reactor {
 
 void SendLogReactor::storeInDatabase() {
-  // TODO handle attachment holders
   database::LogItem logItem(
       this->backupID,
       this->logID,
       (this->persistenceMethod == PersistenceMethod::BLOB),
-      this->value,
+      (this->persistenceMethod == PersistenceMethod::BLOB) ? this->blobHolder
+                                                           : this->value,
       {},
       this->hash);
   database::DatabaseManager::getInstance().putLogItem(logItem);
@@ -29,9 +29,9 @@
 }
 
 void SendLogReactor::initializePutReactor() {
-  if (this->value.empty()) {
+  if (this->blobHolder.empty()) {
     throw std::runtime_error(
-        "put reactor cannot be initialized with empty value");
+        "put reactor cannot be initialized with empty blob holder");
   }
   if (this->hash.empty()) {
     throw std::runtime_error(
@@ -39,7 +39,7 @@
   }
   if (this->putReactor == nullptr) {
     this->putReactor = std::make_shared<reactor::BlobPutClientReactor>(
-        this->value, this->hash, &this->blobPutDoneCV);
+        this->blobHolder, this->hash, &this->blobPutDoneCV);
     this->blobClient.put(this->putReactor);
   }
 }
@@ -90,39 +90,23 @@
       if (chunk->size() == 0) {
         return std::make_unique<grpc::Status>(grpc::Status::OK);
       }
-      // decide if keep in DB or upload to blob
-      if (chunk->size() <= LOG_DATA_SIZE_DATABASE_LIMIT) {
-        if (this->persistenceMethod == PersistenceMethod::UNKNOWN) {
-          this->persistenceMethod = PersistenceMethod::DB;
-          this->value = std::move(*chunk);
-          this->storeInDatabase();
-          return nullptr;
-        } else if (this->persistenceMethod == PersistenceMethod::BLOB) {
-          this->initializePutReactor();
-          this->putReactor->scheduleSendingDataChunk(std::move(chunk));
-        } else {
-          throw std::runtime_error(
-              "error - invalid persistence state for chunk smaller than "
-              "database limit");
-        }
-      } else {
-        if (this->persistenceMethod != PersistenceMethod::UNKNOWN &&
-            this->persistenceMethod != PersistenceMethod::BLOB) {
-          throw std::runtime_error(
-              "error - invalid persistence state, uploading to blob should be "
-              "continued but it is not");
-        }
-        if (this->persistenceMethod == PersistenceMethod::UNKNOWN) {
-          this->persistenceMethod = PersistenceMethod::BLOB;
-        }
-        if (this->value.empty()) {
-          this->value =
-              tools::generateHolder(this->hash, this->backupID, this->logID);
-        }
-        this->initializePutReactor();
+      if (this->persistenceMethod == PersistenceMethod::BLOB) {
         this->putReactor->scheduleSendingDataChunk(std::move(chunk));
+        return nullptr;
+      }
+      this->value += std::move(*chunk);
+      database::LogItem logItem = database::LogItem(
+          this->backupID, this->logID, true, this->value, "", this->hash);
+      if (database::LogItem::getItemSize(&logItem) >
+          LOG_DATA_SIZE_DATABASE_LIMIT) {
+        this->persistenceMethod = PersistenceMethod::BLOB;
+        this->blobHolder =
+            tools::generateHolder(this->hash, this->backupID, this->logID);
+        this->initializePutReactor();
+        this->putReactor->scheduleSendingDataChunk(
+            std::make_unique<std::string>(this->value));
+        this->value = "";
       }
-
       return nullptr;
     };
   }