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https://issues.apache.org/jira/browse/SPARK-24615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16550266#comment-16550266
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Saisai Shao commented on SPARK-24615:
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Hi [~tgraves] I'm still not sure how to handle memory per stage. Unlike MR,
Spark shares the task runtime in a single JVM, I'm not sure how to control the
memory usage within the JVM. Are you suggesting the similar approach like using
GPU, when memory requirement cannot be satisfied, release the current executors
and requesting new executors by dynamic resource allocation?
> Accelerator-aware task scheduling for Spark
> -------------------------------------------
>
> Key: SPARK-24615
> URL: https://issues.apache.org/jira/browse/SPARK-24615
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Saisai Shao
> Assignee: Saisai Shao
> Priority: Major
> Labels: Hydrogen, SPIP
>
> In the machine learning area, accelerator card (GPU, FPGA, TPU) is
> predominant compared to CPUs. To make the current Spark architecture to work
> with accelerator cards, Spark itself should understand the existence of
> accelerators and know how to schedule task onto the executors where
> accelerators are equipped.
> Current Spark’s scheduler schedules tasks based on the locality of the data
> plus the available of CPUs. This will introduce some problems when scheduling
> tasks with accelerators required.
> # CPU cores are usually more than accelerators on one node, using CPU cores
> to schedule accelerator required tasks will introduce the mismatch.
> # In one cluster, we always assume that CPU is equipped in each node, but
> this is not true of accelerator cards.
> # The existence of heterogeneous tasks (accelerator required or not)
> requires scheduler to schedule tasks with a smart way.
> So here propose to improve the current scheduler to support heterogeneous
> tasks (accelerator requires or not). This can be part of the work of Project
> hydrogen.
> Details is attached in google doc. It doesn't cover all the implementation
> details, just highlight the parts should be changed.
>
> CC [~yanboliang] [~merlintang]
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