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consistent checkpoint filenaming #865

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merged 3 commits into from
Mar 18, 2021
Merged

consistent checkpoint filenaming #865

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4febe32
consistent checkpoint filenaming
stas00 Mar 16, 2021
21f00c5
backward compatible rename
stas00 Mar 17, 2021
29c7dbc
Merge branch 'master' into checkpoint
tjruwase Mar 18, 2021
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13 changes: 10 additions & 3 deletions deepspeed/runtime/engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1352,7 +1352,7 @@ def _get_rank_zero_ckpt_name(self, checkpoints_path, tag, mp_rank, dp_rank):
zero_ckpt_name = os.path.join(
checkpoints_path,
str(tag),
filename + '_mp_rank_{:02d}'.format(mp_rank) + 'optim_states.pt')
filename + '_mp_rank_{:02d}'.format(mp_rank) + '_optim_states.pt')
return zero_ckpt_name

def _get_zero_ckpt_name(self, checkpoints_path, tag):
Expand Down Expand Up @@ -1529,13 +1529,20 @@ def _get_all_zero_checkpoints(self, load_dir, tag):
mp_rank=mp_rank,
dp_world_size=self.loaded_checkpoint_dp_world_size)
invalid_zero_ckpt_paths = []
for ckpt_name in zero_ckpt_names:
for i, ckpt_name in enumerate(zero_ckpt_names):
if not os.path.exists(ckpt_name):
# transparently handle the old file pattern for optim_states
if 'optim_states.pt' in ckpt_name:
ckpt_name_try = ckpt_name.replace("_optim_states.pt",
"optim_states.pt")
if os.path.exists(ckpt_name_try):
zero_ckpt_names[i] = ckpt_name_try
continue
invalid_zero_ckpt_paths.append(ckpt_name)

if len(invalid_zero_ckpt_paths) > 0:
logger.warn(
f"Client provided zero checkpoint load paths: {invalid_zero_ckpt_paths} does not exist"
f"The following zero checkpoints paths are missing: {invalid_zero_ckpt_paths}"
)
return None

Expand Down