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Support get/set the whole row of metaheader+weight+optimizer from backend for checkpoint saving/loading #3148

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12 changes: 11 additions & 1 deletion torchrec/distributed/embedding.py
Original file line number Diff line number Diff line change
Expand Up @@ -954,7 +954,17 @@ def _initialize_torch_state(self) -> None: # noqa
(
[
# assuming virtual table only supports rw sharding for now
0 if dim == 0 else dim_size
# When backend return whole row, need to respect dim(1)
# otherwise will see shard dim exceeded tensor dim error
(
0
if dim == 0
else (
local_shards[0].metadata.shard_sizes[1]
if dim == 1
else dim_size
)
)
for dim, dim_size in enumerate(
self._name_to_table_size[table_name]
)
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