# Jobs
<a name="jobs"></a>

Jobs are the unit of work that's started by Amazon Batch. Jobs can be invoked as containerized applications that run on Amazon ECS container instances in an ECS cluster.

Containerized jobs can reference a container image, command, and parameters. For more information, see [JobDefinition](https://docs.amazonaws.cn/batch/latest/APIReference/API_JobDefinition.html).

You can submit a large number of independent, simple jobs.

**Topics**
+ [Tutorial: submit a job](submit_job.md)
+ [Service jobs in Amazon Batch](service-jobs.md)
+ [Job states](job_states.md)
+ [Amazon Batch job environment variables](job_env_vars.md)
+ [Automated job retries](job_retries.md)
+ [Job dependencies](job_dependencies.md)
+ [Job timeouts](job_timeouts.md)
+ [Amazon EKS jobs](eks-jobs.md)
+ [Multi-node parallel jobs](multi-node-parallel-jobs.md)
+ [Multi-node parallel jobs on Amazon EKS](mnp-eks-jobs.md)
+ [Array jobs](array_jobs.md)
+ [Run GPU jobs](gpu-jobs.md)
+ [View Amazon Batch jobs in a job queue](view-jobs.md)
+ [Search Amazon Batch for jobs in a job queue](searching-filtering-jobs.md)
+ [Networking modes for Amazon Batch jobs](networking-modes-jobs.md)
+ [View Amazon Batch job logs in CloudWatch Logs](review-job-logs.md)
+ [Review Amazon Batch job information](review-job-info.md)