add small improvements

Author: exkson

ceph_devstack/resources/ceph/__init__.py

@@ -240,13 +240,17 @@ async def logs(
         except FileNotFoundError:
             logger.error("No log file found")
         except TooManyJobsFound:
-            logger.error("Found too many jobs for provided. Please pick a job id")
+            logger.error(
+                "Found too many jobs for target run. Please pick a job id with -j flag."
+            )
         else:
             if locate:
                 print(log_file)
             else:
+                buffer_size = 8 * 1024
                 with open(log_file) as f:
-                    print(f.read())
+                    while chunk := f.read(buffer_size):
+                        print(chunk)
 
     def get_log_file(self, run_name: str = None, job_id: str = None):
         archive_dir = Teuthology().archive_dir.expanduser()

ceph_devstack/resources/test/test_devstack.py

@@ -147,5 +147,4 @@ def create_logfile(self, data_dir: str, **kwargs):
         log_file = f"{log_dir}/teuthology.log"
         with open(log_file, "w") as f:
             f.write(content)
-        print(log_file)
         return log_file