diff --git a/common/cpp/include/asapo/unittests/MockIO.h b/common/cpp/include/asapo/unittests/MockIO.h
index d6c10de678c3cfa3ad8f4d9c0c1220c96b6e7514..9c80d4ab6bd7205ed45c06f6f12b19e35fc5c438 100644
--- a/common/cpp/include/asapo/unittests/MockIO.h
+++ b/common/cpp/include/asapo/unittests/MockIO.h
@@ -208,13 +208,17 @@ class MockIO : public IO {
     MOCK_CONST_METHOD2(CreateNewDirectory_t, void(const std::string& directory_name, ErrorInterface** err));
 
     MessageData GetDataFromFile(const std::string& fname, uint64_t* fsize, Error* err) const override {
-        ErrorInterface* error = nullptr;
+        std::function<ErrorInterface*()> error;
         auto data = GetDataFromFile_t(fname, fsize, &error);
-        err->reset(error);
+        if (error!=nullptr) {
+            err->reset(error());
+        } else {
+            err->reset(nullptr);
+        }
         return MessageData(data);
     }
 
-    MOCK_CONST_METHOD3(GetDataFromFile_t, uint8_t* (const std::string& fname, uint64_t* fsize, ErrorInterface** err));
+    MOCK_CONST_METHOD3(GetDataFromFile_t, uint8_t* (const std::string& fname, uint64_t* fsize, std::function<ErrorInterface*()>* err_gen));
 
 
     Error GetLastError() const override {
diff --git a/consumer/api/cpp/src/consumer_impl.cpp b/consumer/api/cpp/src/consumer_impl.cpp
index 7d3d565e5db6a80a6382e31b6c39adaf7d9f504c..32ecf6a3671b00e337f0bc78c0887712714c4404 100644
--- a/consumer/api/cpp/src/consumer_impl.cpp
+++ b/consumer/api/cpp/src/consumer_impl.cpp
@@ -371,10 +371,24 @@ Error ConsumerImpl::GetMessageFromServer(GetMessageServerOperation op, uint64_t
 }
 
 Error ConsumerImpl::GetDataFromFile(MessageMeta* info, MessageData* data) {
-    Error error;
-    *data = io__->GetDataFromFile(info->FullName(source_path_), &info->size, &error);
-    if (error) {
-        return ConsumerErrorTemplates::kLocalIOError.Generate(error->Explain());
+    interrupt_flag_ = false;
+    uint64_t elapsed_ms = 0;
+    Error err;
+    while (elapsed_ms <= timeout_ms_) {
+        if (interrupt_flag_) {
+            err = ConsumerErrorTemplates::kInterruptedTransaction.Generate("interrupted by user request");
+            break;
+        }
+        auto start = system_clock::now();
+        *data = io__->GetDataFromFile(info->FullName(source_path_), &info->size, &err);
+        if (err == nullptr) {
+            break;
+        }
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        elapsed_ms += std::chrono::duration_cast<std::chrono::milliseconds>(system_clock::now() - start).count();
+    }
+    if (err != nullptr) {
+        return ConsumerErrorTemplates::kLocalIOError.Generate(err->Explain());
     }
     return nullptr;
 }
diff --git a/consumer/api/cpp/unittests/test_consumer_impl.cpp b/consumer/api/cpp/unittests/test_consumer_impl.cpp
index 6ad5448e5d336702803094aa454d40e4292e9555..be641e76cd2c11787ba1f763aa4a75592300e762 100644
--- a/consumer/api/cpp/unittests/test_consumer_impl.cpp
+++ b/consumer/api/cpp/unittests/test_consumer_impl.cpp
@@ -58,6 +58,10 @@ TEST(FolderDataBroker, Constructor) {
 
 const uint8_t expected_value = 1;
 
+asapo::ErrorInterface* new_error(){
+  return new asapo::SimpleError{"s"};
+};
+
 class ConsumerImplTests : public Test {
  public:
   std::unique_ptr<ConsumerImpl> consumer, fts_consumer;
@@ -167,9 +171,14 @@ class ConsumerImplTests : public Test {
           return;
       }
 
-      EXPECT_CALL(mock_io, GetDataFromFile_t(expected_full_path, testing::Pointee(100), _)).Times(times).
-          WillRepeatedly(DoAll(SetArgPointee<2>(new asapo::SimpleError{"s"}), testing::Return(nullptr)));
+      auto simple_error = []{
+          return new asapo::SimpleError{"s"};
+      };
+
+      EXPECT_CALL(mock_io, GetDataFromFile_t(expected_full_path, testing::Pointee(100), _)).Times(AtLeast(times)).
+          WillRepeatedly(DoAll(SetArgPointee<2>(simple_error), testing::Return(nullptr)));
   }
+
   MessageMeta CreateFI(uint64_t buf_id = expected_buf_id) {
       MessageMeta fi;
       fi.size = expected_message_size;
@@ -564,6 +573,23 @@ TEST_F(ConsumerImplTests, GetMessageCallsReadFromFileIfZeroBufId) {
     consumer->GetNext(expected_group_id, &info, &data, expected_stream);
 }
 
+TEST_F(ConsumerImplTests, GetMessageCallsRetriesReadFromFile) {
+    MockGetBrokerUri();
+    auto to_send = CreateFI(0);
+    auto json = to_send.Json();
+    MockGet(json);
+    consumer->SetTimeout(200);
+
+    MessageData data;
+
+    EXPECT_CALL(mock_netclient, GetData_t(_, _)).Times(0);
+
+    MockReadDataFromFile(2);
+
+    consumer->GetNext(expected_group_id, &info, &data, expected_stream);
+}
+
+
 TEST_F(ConsumerImplTests, GenerateNewGroupIdReturnsErrorCreateGroup) {
     MockGetBrokerUri();
 
diff --git a/producer/api/cpp/unittests/test_request_handler_filesystem.cpp b/producer/api/cpp/unittests/test_request_handler_filesystem.cpp
index 9c666a0561cac488cd3d0826e8b773bc52df4994..d0b042aa09729ccb700e780c201f8e1639969e1f 100644
--- a/producer/api/cpp/unittests/test_request_handler_filesystem.cpp
+++ b/producer/api/cpp/unittests/test_request_handler_filesystem.cpp
@@ -130,11 +130,14 @@ TEST_F(RequestHandlerFilesystemTests, WorksWithemptyCallback) {
 
 
 TEST_F(RequestHandlerFilesystemTests, FileRequestErrorOnReadData) {
+    auto unknown_error = []{
+      return asapo::IOErrorTemplates::kUnknownIOError.Generate().release();
+    };
 
     EXPECT_CALL(mock_io, GetDataFromFile_t(expected_origin_fullpath, testing::Pointee(expected_file_size), _))
     .WillOnce(
         DoAll(
-            testing::SetArgPointee<2>(asapo::IOErrorTemplates::kUnknownIOError.Generate().release()),
+            testing::SetArgPointee<2>(unknown_error),
             Return(nullptr)
         ));
 
diff --git a/tests/manual/mongodb_performance/go.mod b/tests/manual/mongodb_performance/go.mod
new file mode 100644
index 0000000000000000000000000000000000000000..eb828f99573d51e8b9bfa728127e5466617f4c50
--- /dev/null
+++ b/tests/manual/mongodb_performance/go.mod
@@ -0,0 +1,5 @@
+module perf
+
+go 1.16
+
+require go.mongodb.org/mongo-driver v1.5.1
diff --git a/tests/manual/mongodb_performance/go.sum b/tests/manual/mongodb_performance/go.sum
new file mode 100644
index 0000000000000000000000000000000000000000..1ec00898ead19b91f2b3f8ba6106c18a2c51205d
--- /dev/null
+++ b/tests/manual/mongodb_performance/go.sum
@@ -0,0 +1,125 @@
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diff --git a/tests/manual/mongodb_performance/perf b/tests/manual/mongodb_performance/perf
new file mode 100755
index 0000000000000000000000000000000000000000..40103d1481d0a828eff4a7908ab4cc626316595a
Binary files /dev/null and b/tests/manual/mongodb_performance/perf differ
diff --git a/tests/manual/mongodb_performance/perf.go b/tests/manual/mongodb_performance/perf.go
new file mode 100644
index 0000000000000000000000000000000000000000..947aded3e8229ed76d6c7d4dda3cebdd22eb3753
--- /dev/null
+++ b/tests/manual/mongodb_performance/perf.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"context"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/mongo/writeconcern"
+	"go.mongodb.org/mongo-driver/x/bsonx"
+	"log"
+	"os"
+	"strconv"
+	"time"
+)
+
+var client *mongo.Client
+
+var address = "localhost:27017"
+
+func connectDb() error {
+	opts := options.Client().SetConnectTimeout(20 * time.Second).
+		ApplyURI("mongodb://" + address).SetWriteConcern(writeconcern.New(writeconcern.J(false)))
+	var err error
+	client, err = mongo.NewClient(opts)
+	if err != nil {
+		return err
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	defer cancel()
+	err = client.Connect(ctx)
+	if err != nil {
+		client = nil
+		return err
+	}
+	return nil
+}
+
+type MessageRecord struct {
+	ID             int                    `bson:"id" json:"id"`
+	Timestamp      int                    `bson:"timestamp" json:"timestamp"`
+	Name           string                 `bson:"name" json:"name"`
+	Meta           map[string]interface{} `json:"meta"`
+	NextStream     string
+	FinishedStream bool
+}
+
+func getRecord(id int) *MessageRecord {
+	var rec MessageRecord
+	rec.ID = id
+	rec.Name = "rec_" + strconv.Itoa(id)
+	rec.NextStream = "ns"
+	rec.FinishedStream = true
+	return &rec
+}
+
+
+func main() {
+	if err := connectDb(); err != nil {
+		log.Fatal(err)
+	}
+	ctx := context.Background()
+
+	dbName := "test"
+	client.Database(dbName).Drop(ctx)
+
+	nRecords, _ := strconv.Atoi(os.Args[1])
+	nCollections, _ := strconv.Atoi(os.Args[2])
+
+	keysDoc := bsonx.Doc{}
+	keysDoc = keysDoc.Append("name", bsonx.Int32(1)).
+		Append("id", bsonx.Int32(1))
+
+	mod := mongo.IndexModel{
+		Keys: keysDoc, Options: nil,
+	}
+
+	_, err := client.Database(dbName).Collection("data").Indexes().CreateOne(ctx, mod)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	start := time.Now()
+	for col := 0; col < nCollections; col++ {
+		collection := "col" + strconv.Itoa(col+1)
+		for i := 0; i < nRecords/nCollections; i++ {
+			rec := getRecord(i+1)
+			rec.Name = collection
+			_, err := client.Database(dbName).Collection("data").InsertOne(ctx, rec)
+			if err != nil {
+				log.Fatal(err)
+			}
+		}
+	}
+	elapsed := time.Since(start)
+	log.Printf("write %d records/sec", int(float64(nRecords)/elapsed.Seconds()))
+
+}