fix backup path

Author: RCasatta

otsserver/backup.py

@@ -27,6 +27,7 @@ def __init__(self, journal, calendar, cache_path):
         self.journal = journal
         self.calendar = calendar
         self.cache_path = cache_path
+        os.makedirs(cache_path, exist_ok=True)
 
     def __getitem__(self, chunk):
         cached_kv_bytes = self.read_disk_cache(chunk)

otsserver/rpc.py

@@ -243,7 +243,7 @@ class rpc_request_handler(RPCRequestHandler):
         rpc_request_handler.calendar = calendar
 
         journal = Journal(calendar.path + '/journal')
-        rpc_request_handler.backup = Backup(journal, calendar)
+        rpc_request_handler.backup = Backup(journal, calendar, calendar.path + '/backup_cache')
 
         super().__init__(server_address, rpc_request_handler)