Improve upload performance for numerous files

- Do not perform remote file point query on overwrite
- Further improvements may include moving to a one-time list cache

blobxfer/operations/download.py

@@ -820,7 +820,7 @@ class Downloader(object):
                     'was specified')
             else:
                 logger.debug(
-                    ('{0} files {1:.4f} MiB filesize and/or lmt_ge '
+                    ('{0} files {1:.4f} MiB filesize, lmt_ge, or no overwrite '
                      'skipped').format(
                         skipped_files, skipped_size / blobxfer.util.MEGABYTE))
                 logger.debug(

blobxfer/operations/upload.py

@@ -886,6 +886,9 @@ class Uploader(object):
         :rtype: blobxfer.models.azure.StorageEntity
         :return: remote storage entity
         """
+        ase = None
+        if self._spec.options.overwrite or not sa.can_read_object:
+            return ase
         if self._spec.options.mode == blobxfer.models.azure.StorageModes.File:
             fp = blobxfer.operations.azure.file.get_file_properties(
                 sa.file_client, cont, name)
@@ -918,8 +921,6 @@ class Uploader(object):
                 self._spec.options.store_file_properties.content_type or
                 blobxfer.util.get_mime_type(ase.name)
             )
-        else:
-            ase = None
         return ase
 
     def _generate_destination_for_source(self, local_path):
@@ -958,10 +959,7 @@ class Uploader(object):
                     VectoredIoDistributionMode.Stripe):
                 ase = None
             else:
-                if sa.can_read_object:
-                    ase = self._check_for_existing_remote(sa, cont, name)
-                else:
-                    ase = None
+                ase = self._check_for_existing_remote(sa, cont, name)
             if ase is None:
                 # encryption metadata will be populated later, if required
                 ase = blobxfer.models.azure.StorageEntity(cont, ed=None)
@@ -1212,7 +1210,7 @@ class Uploader(object):
                     'was specified')
             else:
                 logger.debug(
-                    ('{0} files {1:.4f} MiB filesize and/or lmt_ge '
+                    ('{0} files {1:.4f} MiB filesize, lmt_ge, or no overwrite '
                      'skipped').format(
                         skipped_files, skipped_size / blobxfer.util.MEGABYTE))
                 logger.debug(

tests/test_blobxfer_operations_upload.py

@@ -928,15 +928,22 @@ def test_check_upload_conditions(gmfm):
 def test_check_for_existing_remote(gbp, gfp):
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = True
 
     sa = mock.MagicMock()
     sa.name = 'name'
     sa.endpoint = 'ep'
+    sa.can_read_object = True
 
     u._spec.options.mode = azmodels.StorageModes.File
     gfp.return_value = None
     assert u._check_for_existing_remote(sa, 'cont', 'name') is None
 
+    u._spec.options.overwrite = False
+
+    gfp.return_value = None
+    assert u._check_for_existing_remote(sa, 'cont', 'name') is None
+
     with mock.patch(
             'blobxfer.models.crypto.EncryptionMetadata.'
             'encryption_metadata_exists', return_value=False):
@@ -989,6 +996,7 @@ def test_check_for_existing_remote(gbp, gfp):
 def test_generate_destination_for_source():
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._check_for_existing_remote = mock.MagicMock()
 
     lp = mock.MagicMock()
@@ -1041,7 +1049,7 @@ def test_generate_destination_for_source():
     a, b = next(u._generate_destination_for_source(lp))
     assert a == sa
     assert b is not None
-    assert u._check_for_existing_remote.call_count == 1  # should not change
+    assert u._check_for_existing_remote.call_count == 2
 
 
 def test_vectorize_and_bind():
@@ -1080,6 +1088,7 @@ def test_vectorize_and_bind():
     # no vectorization
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._spec.options.vectored_io.distribution_mode = \
         models.VectoredIoDistributionMode.Disabled
     u._check_upload_conditions = mock.MagicMock()
@@ -1102,6 +1111,7 @@ def test_vectorize_and_bind():
     # stripe vectorization 1 slice
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._check_upload_conditions = mock.MagicMock()
     u._check_upload_conditions.return_value = ops.UploadAction.Upload
     u._spec.options.vectored_io.distribution_mode = \
@@ -1164,6 +1174,7 @@ def test_vectorize_and_bind():
     # replication single target
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._spec.options.vectored_io.distribution_mode = \
         models.VectoredIoDistributionMode.Replica
     u._check_upload_conditions = mock.MagicMock()
@@ -1216,6 +1227,7 @@ def test_run(lfmo, urm, tmpdir):
     u._general_options.concurrency.md5_processes = 1
     u._general_options.concurrency.crypto_processes = 1
     u._general_options.resume_file = 'resume'
+    u._spec.options.overwrite = False
     u._spec.options.store_file_properties.md5 = True
     u._spec.skip_on.md5_match = True
     u._spec.options.rsa_public_key = 'abc'
@@ -1313,6 +1325,7 @@ def test_run(lfmo, urm, tmpdir):
     # regular execution
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._general_options.concurrency.disk_threads = 1
     u._general_options.concurrency.transfer_threads = 1
     u._general_options.concurrency.md5_processes = 1
@@ -1352,6 +1365,7 @@ def test_run(lfmo, urm, tmpdir):
     u._general_options.concurrency.md5_processes = 1
     u._general_options.concurrency.crypto_processes = 0
     u._general_options.resume_file = 'resume'
+    u._spec.options.overwrite = False
     u._spec.options.store_file_properties.md5 = True
     u._spec.skip_on.md5_match = True
     u._spec.options.rsa_public_key = None
@@ -1392,6 +1406,7 @@ def test_run(lfmo, urm, tmpdir):
     u._general_options.concurrency.md5_processes = 1
     u._general_options.concurrency.crypto_processes = 0
     u._general_options.resume_file = 'resume'
+    u._spec.options.overwrite = False
     u._spec.options.store_file_properties.md5 = True
     u._spec.skip_on.md5_match = True
     u._spec.options.rsa_public_key = None
@@ -1455,6 +1470,7 @@ def test_run(lfmo, urm, tmpdir):
 def test_start():
     u = ops.Uploader(mock.MagicMock(), mock.MagicMock(), mock.MagicMock())
     u._general_options.dry_run = False
+    u._spec.options.overwrite = False
     u._spec.options.delete_only = False
     u._wait_for_transfer_threads = mock.MagicMock()
     u._wait_for_disk_threads = mock.MagicMock()