Tarantella 0.8.0

Major Changes

• Add support for TensorFlow v2.0-2.7
• Keras: callbacks: add support for custom callbacks and lambda callbacks
• Model parallelism: initial pipelining implementation
• Collectives: create TensorAllgatherer to perform Allgatherv operations for TensorFlow tensors

Changes

• Keras: warn when BatchNormalization layers are used with too small micro-batch sizes
• Collectives: switch to PyGPI-based implementations
• Collectives: TensorAllreducer: add support for arbitrary lists and lists of tensors instead of only list of arrays
• Collectives: TensorAllreducer: extend supported datatypes
• Runtime: improve path handling for dependencies
• Update README
• Update docs

Bug fixes

• Python bindings: ensure destruction of GaspiCxx-based objects