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|
Get a partitioner for VariableScope to keep shards below max_shard_bytes.
tf.variable_axis_size_partitioner(
max_shard_bytes, axis=0, bytes_per_string_element=16, max_shards=None
)
This partitioner will shard a Variable along one axis, attempting to keep
the maximum shard size below max_shard_bytes. In practice, this is not
always possible when sharding along only one axis. When this happens,
this axis is sharded as much as possible (i.e., every dimension becomes
a separate shard).
If the partitioner hits the max_shards limit, then each shard may end up
larger than max_shard_bytes. By default max_shards equals None and no
limit on the number of shards is enforced.
One reasonable value for max_shard_bytes is (64 << 20) - 1, or almost
64MB, to keep below the protobuf byte limit.
Args | |
|---|---|
max_shard_bytes
|
The maximum size any given shard is allowed to be. |
axis
|
The axis to partition along. Default: outermost axis. |
bytes_per_string_element
|
If the Variable is of type string, this provides
an estimate of how large each scalar in the Variable is.
|
max_shards
|
The maximum number of shards in int created taking precedence
over max_shard_bytes.
|
Returns | |
|---|---|
A partition function usable as the partitioner argument to
variable_scope and get_variable.
|
Raises | |
|---|---|
ValueError
|
If any of the byte counts are non-positive. |