diff --git a/pdb-ui/src/main/java/org/lucares/pdbui/CsvUploadHandler.java b/pdb-ui/src/main/java/org/lucares/pdbui/CsvUploadHandler.java
index 2d5e464..47b4394 100644
--- a/pdb-ui/src/main/java/org/lucares/pdbui/CsvUploadHandler.java
+++ b/pdb-ui/src/main/java/org/lucares/pdbui/CsvUploadHandler.java
@@ -1,18 +1,14 @@
 package org.lucares.pdbui;
 
-import java.io.FileInputStream;
 import java.io.IOException;
-import java.nio.file.Files;
+import java.io.InputStream;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.UUID;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
@@ -22,7 +18,6 @@ import org.lucares.utils.file.FileUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.DisposableBean;
-import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -31,56 +26,32 @@ public class CsvUploadHandler implements PropertyKeys, DisposableBean {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(CsvUploadHandler.class);
 
-    private final Path tmpDir;
-
     private final ExecutorService threadPool = Executors.newFixedThreadPool(2);
 
     private final PerformanceDb performanceDb;
 
-    public CsvUploadHandler(@Value("${" + TMP_DIR + "}") final String tmpDir, final PerformanceDb performanceDb)
-            throws IOException {
-        this.tmpDir = Paths.get(tmpDir).resolve("uploads");
-        Files.createDirectories(this.tmpDir);
+    public CsvUploadHandler(final PerformanceDb performanceDb) throws IOException {
         this.performanceDb = performanceDb;
     }
 
-    public void ingest(final List<MultipartFile> files, final CsvReaderSettings settings,
-            final boolean waitUntilFinished)
+    public void ingest(final List<MultipartFile> files, final CsvReaderSettings settings)
             throws IllegalStateException, IOException, InterruptedException, ExecutionException, TimeoutException {
 
         final List<Path> tmpFiles = new ArrayList<Path>();
 
         try {
-            for (final MultipartFile file : files) {
-                final Path tmpFile = tmpDir.resolve(UUID.randomUUID().toString());
-                tmpFiles.add(tmpFile);
-                LOGGER.debug("writing uploaded file to {}", tmpFile);
-                file.transferTo(tmpFile);
-            }
-        } catch (RuntimeException | IOException e) {
-            FileUtils.deleteSilently(tmpFiles);
-            throw e;
-        }
-
-        final Future<?> future = threadPool.submit(() -> {
             final ArrayBlockingQueue<Entries> queue = performanceDb.getQueue();
-            for (final Path tmpFile : tmpFiles) {
-                try {
-                    final CsvToEntryTransformer csvToEntryTransformer = new CsvToEntryTransformer(queue, settings);
-                    try (FileInputStream in = new FileInputStream(tmpFile.toFile())) {
-                        csvToEntryTransformer.readCSV(in);
-                    }
-
-                    LOGGER.debug("delete uploaded file {}", tmpFile);
-                    Files.delete(tmpFile);
-
+            for (final MultipartFile file : files) {
+                final CsvToEntryTransformer csvToEntryTransformer = new CsvToEntryTransformer(queue, settings);
+                try (InputStream in = file.getInputStream()) {
+                    csvToEntryTransformer.readCSV(in);
                 } catch (final Exception e) {
                     LOGGER.error("csv ingestion failed", e);
                 }
             }
-        });
-        if (waitUntilFinished) {
-            future.get(1, TimeUnit.HOURS);
+        } catch (final RuntimeException e) {
+            FileUtils.deleteSilently(tmpFiles);
+            throw e;
         }
     }
 
diff --git a/pdb-ui/src/main/java/org/lucares/pdbui/PdbController.java b/pdb-ui/src/main/java/org/lucares/pdbui/PdbController.java
index 15add04..0aa8fde 100644
--- a/pdb-ui/src/main/java/org/lucares/pdbui/PdbController.java
+++ b/pdb-ui/src/main/java/org/lucares/pdbui/PdbController.java
@@ -298,11 +298,10 @@ public class PdbController implements HardcodedValues, PropertyKeys {
     @ResponseBody
     @ResponseStatus(code = HttpStatus.CREATED)
     public String handleCsvFileUpload(@RequestParam("file") final MultipartFile[] files,
-            @RequestPart("settings") final CsvReaderSettings csvReaderSettings,
-            @RequestParam(name = "waitUntilFinished", defaultValue = "false") final boolean waitUntilFinished)
+            @RequestPart("settings") final CsvReaderSettings csvReaderSettings)
             throws IllegalStateException, IOException, InterruptedException, ExecutionException, TimeoutException {
 
-        csvUploadHandler.ingest(List.of(files), csvReaderSettings, waitUntilFinished);
+        csvUploadHandler.ingest(List.of(files), csvReaderSettings);
         return ""; // return value might become a job id that can be used to cancel, or observe
                    // status
     }
diff --git a/plogdownloader/performance_to_json.py b/plogdownloader/performance_to_json.py
index 5ef20c3..8f3450f 100644
--- a/plogdownloader/performance_to_json.py
+++ b/plogdownloader/performance_to_json.py
@@ -216,13 +216,12 @@ def send_csv(zip, file_in_zip, csvSettings):
                     'settings': ('csvReaderSettings.json', csvSettings , 'application/json')
                 })
 
-            r = requests.post('http://localhost:17333/api/data?waitUntilFinished=true', data=m,
+            r = requests.post('http://localhost:17333/api/data', data=m,
                 headers={
                     'Accept': 'text/plain, application/json, application/*+json, */*',
                     'Content-Type': m.content_type.replace("form-data", "mixed;charset=UTF-8")
             })
-            print("response:")
-            print(r)
+            print("response: %s" % r)
     finally:
         shutil.rmtree(tmp_folder)