AdaptDL Documentation

AdaptDL is a resource-adaptive deep learning (DL) training and scheduling framework. The goal of AdaptDL is to make distributed DL easy and efficient in dynamic-resource environments such as shared clusters and the cloud.

Some core features offered by AdaptDL are:

  • Elastically schedule distributed DL training jobs in shared clusters.

  • Cost-aware resource auto-scaling in cloud computing environments (e.g. AWS).

  • Automatic batch size and learning rate scaling for distributed training.

AdaptDL supports PyTorch training programs. TensorFlow support coming soon!

Why AdaptDL?

Efficient Resource Management

The AdaptDL scheduler directly optimizes cluster-wide training performance and resource utilization, by using a genetic algorithm to periodically optimize resource allocations for all jobs. Through elastic re-scaling, co-adapting batch sizes and learning rates, and avoiding network interference, AdaptDL significantly accelerates shared-cluster training when compared with alternative schedulers. For details, please see our technical paper.

_images/scheduling-performance.png

In the cloud (e.g. AWS), AdaptDL auto-scales the size of the cluster based on how well those cluster resources are utilized. AdaptDL automatically provisions spot instances when available to reduce cost by up to 80%.

Adaptive Batch Size Scaling

Efficient distributed training requires careful selection of the batch size and learning rate, which can be tricky to find manually. AdaptDL offers automatic batch size and learning rate scaling, which enables efficient distributed training without requiring manual effort. To achieve this, AdaptDL measures the system performance and gradient noise scale during training, and adaptively selects the most efficient batch size and learning rate.

_images/autobsz-performance.png

Easy-to-use Elastic API

Making training programs run elastically can be challenging and error-prone. AdaptDL offers APIs which make it easy to enable elasticity for data-parallel PyTorch programs. Simply change a few lines of code, without heavy refactoring!

BEFORE:

torch.distributed.init_process_group("nccl")
model = torch.nn.parallel.DistributedDataParallel(model)
dataloader = torch.utils.data.DataLoader(dataset, batch_size=128)
for epoch in range(100):
    ...

AFTER:

adaptdl.torch.init_process_group("nccl")
model = adaptdl.torch.AdaptiveDataParallel(model, optimizer)
dataloader = adaptdl.torch.AdaptiveDataLoader(dataset, batch_size=128)
for epoch in adaptdl.torch.remaining_epochs_until(100):
    ...

Getting Started

AdaptDL consists of a Kubernetes job scheduler and an adaptive training library. They can be used in two ways:

  1. Scheduling multiple training jobs on a shared cluster or the cloud (Scheduler Installation).

  2. Adapting the batch size and learning rate for a single training job (Standalone Training).