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* [Dist] enable to chunk node/edge data into arbitrary number of chunks

* [Dist] enable to split node/edge data into arbitrary parts

* refine code

* Format boolean to uint8 forcely to avoid dist.scatter failure

* convert boolean to int8 before scatter and revert it after scatter

* refine code

* fix test

* refine code

* move test utilities into utils.py

* update comment

* fix empty data

* update

* update

* fix empty data issue

* release unnecessary mem

* release unnecessary mem

* release unnecessary mem

* release unnecessary mem

* release unnecessary mem

* remove unnecessary shuffle data

* separate array_split into standalone utility

* add example
Co-authored-by: xiang song(charlie.song) <classicxsong@gmail.com>

* chunked graph data format

* Update

* Update

* Update task_distributed_test.sh

* Update

* Update

* Revert "Update"

This reverts commit 03c461870f19375fb03125b061fc853ab555577f.

* Update

* Update

* ssh-keygen

* CI

* install openssh

* openssh

* Update

* CI

* Update

* Update
Co-authored-by: Ubuntu <ubuntu@ip-172-31-53-142.us-west-2.compute.internal>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-16-87.us-west-2.compute.internal>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-20-21.us-west-2.compute.internal>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-9-26.ap-northeast-1.compute.internal>

* [CI] separate distributed tests from torch cpu tests

* remove TF related env