crunch_scripts/crunchutil/robust_put.py

   1 import arvados
   2 import arvados.commands.put as put
   3 import os
   4 import logging
   5 import time
   6
   7 def machine_progress(bytes_written, bytes_expected):
   8     return "upload wrote {} total {}\n".format(
   9         bytes_written, -1 if (bytes_expected is None) else bytes_expected)
  10
  11 class Args(object):
  12     def __init__(self, fn):
  13         self.filename = None
  14         self.paths = [fn]
  15         self.max_manifest_depth = 0
  16
  17 # Upload to Keep with error recovery.
  18 # Return a uuid or raise an exception if there are too many failures.
  19 def upload(source_dir, logger=None):
  20     if logger is None:
  21         logger = logging.getLogger("arvados")
  22
  23     source_dir = os.path.abspath(source_dir)
  24     done = False
  25     if 'TASK_WORK' in os.environ:
  26         resume_cache = put.ResumeCache(os.path.join(arvados.current_task().tmpdir, "upload-output-checkpoint"))
  27     else:
  28         resume_cache = put.ResumeCache(put.ResumeCache.make_path(Args(source_dir)))
  29     reporter = put.progress_writer(machine_progress)
  30     bytes_expected = put.expected_bytes_for([source_dir])
  31     backoff = 1
  32     outuuid = None
  33     while not done:
  34         try:
  35             out = put.ArvPutCollectionWriter.from_cache(resume_cache, reporter, bytes_expected)
  36             out.do_queued_work()
  37             out.write_directory_tree(source_dir, max_manifest_depth=0)
  38             outuuid = out.finish()
  39             done = True
  40         except KeyboardInterrupt as e:
  41             logger.critical("caught interrupt signal 2")
  42             raise e
  43         except Exception as e:
  44             logger.exception("caught exception:")
  45             backoff *= 2
  46             if backoff > 256:
  47                 logger.critical("Too many upload failures, giving up")
  48                 raise e
  49             else:
  50                 logger.warning("Sleeping for %s seconds before trying again" % backoff)
  51                 time.sleep(backoff)
  52     return outuuid