[feature] make concurrent blob writes configurable

5 files changed, 29 insertions, 21 deletions

diff --git a/docs/server.rst b/docs/server.rst
index 90321922..f06668d7 100644
--- a/docs/server.rst
+++ b/docs/server.rst
@@ -15,22 +15,24 @@ Soledad Server looks for a configuration file in
 ``/etc/soledad/soledad-server.conf`` and will read the following configuration
 options from the ``[soledad-server]`` section:
 
-==================== =============================================== ================================
-Option               Description                                     Default value
-==================== =============================================== ================================
-couch_url            The URL of the CouchDB backend storage.         ``http://localhost:5984``
-create_cmd           The shell command to create user databases.     None
-admin_netrc          The netrc file to be used for authenticating    ``/etc/couchdb/couchdb.netrc``
-                     with the CouchDB backend storage.
-batching             Whether to use batching capabilities for        ``true``
-                     synchronization.
-blobs                Whether to provide the Blobs functionality or   ``false``
-                     not.
-blobs_path           The path for blobs storage in the server's file ``/var/lib/soledad/blobs``
-                     system.
-services_tokens_file The file containing authentication tokens for   ``/etc/soledad/services.tokens``
-                     services provided through the Services API.
-==================== =============================================== ================================
+====================== =============================================== ================================
+Option                 Description                                     Default value
+====================== =============================================== ================================
+couch_url              The URL of the CouchDB backend storage.         ``http://localhost:5984``
+create_cmd             The shell command to create user databases.     None
+admin_netrc            The netrc file to be used for authenticating    ``/etc/couchdb/couchdb.netrc``
+                       with the CouchDB backend storage.
+batching               Whether to use batching capabilities for        ``true``
+                       synchronization.
+blobs                  Whether to provide the Blobs functionality or   ``false``
+                       not.
+blobs_path             The path for blobs storage in the server's file ``/var/lib/soledad/blobs``
+                       system.
+concurrent_blob_writes Limit of concurrent blob writes to the          50
+                       filesystem.
+services_tokens_file   The file containing authentication tokens for   ``/etc/soledad/services.tokens``
+                       services provided through the Services API.
+====================== =============================================== ================================
 
 Running
 -------
diff --git a/src/leap/soledad/server/_blobs.py b/src/leap/soledad/server/_blobs.py
index cd47098d..22277fc4 100644
--- a/src/leap/soledad/server/_blobs.py
+++ b/src/leap/soledad/server/_blobs.py
@@ -62,9 +62,10 @@ VALID_STRINGS = re.compile('^[a-zA-Z0-9_-]+$')
 @implementer(interfaces.IIncomingBoxBackend)
 class FilesystemBlobsBackend(object):
 
-    def __init__(self, blobs_path='/tmp/blobs/', quota=200 * 1024):
+    def __init__(self, blobs_path='/tmp/blobs/', quota=200 * 1024,
+                 concurrent_writes=50):
         self.quota = quota
-        self.semaphore = defer.DeferredSemaphore(50)  # TODO: make configurable
+        self.semaphore = defer.DeferredSemaphore(concurrent_writes)
         if not os.path.isdir(blobs_path):
             os.makedirs(blobs_path)
         self.path = blobs_path
diff --git a/src/leap/soledad/server/_config.py b/src/leap/soledad/server/_config.py
index c23f1eae..0d37879e 100644
--- a/src/leap/soledad/server/_config.py
+++ b/src/leap/soledad/server/_config.py
@@ -33,6 +33,7 @@ CONFIG_DEFAULTS = {
         'blobs': False,
         'blobs_path': '/var/lib/soledad/blobs',
         'services_tokens_file': '/etc/soledad/services.tokens',
+        'concurrent_blob_writes': 50,
     },
     'database-security': {
         'members': ['soledad'],
diff --git a/src/leap/soledad/server/auth.py b/src/leap/soledad/server/auth.py
index da13dc8c..39eb09f6 100644
--- a/src/leap/soledad/server/auth.py
+++ b/src/leap/soledad/server/auth.py
@@ -56,8 +56,11 @@ class SoledadRealm(object):
         if conf is None:
             conf = get_config()
         blobs = conf['blobs']
-        blobs_resource = BlobsResource("filesystem",
-                                       conf['blobs_path']) if blobs else None
+        concurrent_writes = conf['concurrent_blob_writes']
+        blobs_resource = BlobsResource(
+            "filesystem",
+            conf['blobs_path'],
+            concurrent_writes=concurrent_writes) if blobs else None
         self.anon_resource = AnonymousResource(
             enable_blobs=blobs)
         self.auth_resource = PublicResource(
diff --git a/tests/server/test_config.py b/tests/server/test_config.py
index dfb09f4c..92b0f67f 100644
--- a/tests/server/test_config.py
+++ b/tests/server/test_config.py
@@ -66,5 +66,6 @@ class ConfigurationParsingTest(unittest.TestCase):
                     'batching': False,
                     'blobs': False,
                     'services_tokens_file': '/etc/soledad/services.tokens',
-                    'blobs_path': '/var/lib/soledad/blobs'}
+                    'blobs_path': '/var/lib/soledad/blobs',
+                    'concurrent_blob_writes': 50}
         self.assertDictEqual(expected, config['soledad-server'])