fix doc, make prints conditional on debug boolen parameter

xtreemfs_client/dataDistribution.py

@@ -45,7 +45,7 @@ class DataDistribution(object):
 
     def get_osd_list(self):
         """
-        get a list of all existing OSDs.
+        get a list of all existing OSD uuids.
         """
         osd_list = []
         for osd_name in self.OSDs.keys():
@@ -89,7 +89,8 @@ class DataDistribution(object):
                     osd_information=None, ratio_parameter='', capacity='',
                     ignore_osd_capacities=True,
                     random_osd_assignment=False,
-                    ignore_folder_sizes=False):
+                    ignore_folder_sizes=False,
+                    debug=False):
         # TODO update doc
         """
         adds a list of folders to the data distribution.
@@ -108,14 +109,16 @@ class DataDistribution(object):
             else:
                 new_folders.append(folder)
 
-        print("dataDistribution: random_osd_assignment: " + str(random_osd_assignment))
+        if debug:
+            print("dataDistribution: random_osd_assignment: " + str(random_osd_assignment))
 
         osds_for_new_folders = []
 
         # totally random OSD assignment, even ignoring OSD capacities
         # (might lead to I/O errors when too many groups are assigned to an OSD)
         if random_osd_assignment and ignore_osd_capacities:
-            print("using totally random osd assignment")
+            if debug:
+                print("using totally random osd assignment")
             for folder in new_folders:
                 random_osd = random.choice(list(self.OSDs.values()))
                 random_osd.add_folder(folder.id, folder.size)
@@ -128,7 +131,8 @@ class DataDistribution(object):
             if osd_information is None or ratio_parameter == '':
                 raise ValueError("ignore_osd_capacities=False is not possible if osd_information or capacity is"
                                  "not given!")
-            print("using random osd assignment, respecting osd capacities")
+            if debug:
+                print("using random osd assignment, respecting osd capacities")
             for folder in new_folders:
                 suitable_osds = [] # list of OSDs with enough capacity
                 for one_osd in self.OSDs.values():