toil.batchSystems.awsBatch

Batch system for running Toil workflows on AWS Batch.

Useful with the AWS job store.

AWS Batch has no means for scheduling based on disk usage, so the backing machines need to have “enough” disk and other constraints need to guarantee that disk does not fill.

Assumes that an AWS Batch Queue name or ARN is already provided.

Handles creating and destroying a JobDefinition for the workflow run.

Additional containers should be launched with Singularity, not Docker.

Attributes

logger

STATE_TO_EXIT_REASON

MAX_POLL_COUNT

MIN_REQUESTABLE_MIB

MIN_REQUESTABLE_CORES

Classes

AWSBatchBatchSystem

Adds cleanup support when the last running job leaves a node, for batch

Module Contents

toil.batchSystems.awsBatch.logger
toil.batchSystems.awsBatch.STATE_TO_EXIT_REASON: Dict[str, toil.batchSystems.abstractBatchSystem.BatchJobExitReason]
toil.batchSystems.awsBatch.MAX_POLL_COUNT = 100
toil.batchSystems.awsBatch.MIN_REQUESTABLE_MIB = 4
toil.batchSystems.awsBatch.MIN_REQUESTABLE_CORES = 1
class toil.batchSystems.awsBatch.AWSBatchBatchSystem(config, maxCores, maxMemory, maxDisk)

Bases: toil.batchSystems.cleanup_support.BatchSystemCleanupSupport

Adds cleanup support when the last running job leaves a node, for batch systems that can’t provide it using the backing scheduler.

Parameters:
classmethod supportsAutoDeployment()

Whether this batch system supports auto-deployment of the user script itself.

If it does, the setUserScript() can be invoked to set the resource object representing the user script.

Note to implementors: If your implementation returns True here, it should also override

Return type:

bool

setUserScript(user_script)

Set the user script for this workflow.

This method must be called before the first job is issued to this batch system, and only if supportsAutoDeployment() returns True, otherwise it will raise an exception.

Parameters:
  • userScript – the resource object representing the user script or module and the modules it depends on.

  • user_script (toil.resource.Resource)

Return type:

None

issueBatchJob(command, job_desc, job_environment=None)

Issues a job with the specified command to the batch system and returns a unique job ID number.

Parameters:
  • command (str) – the command to execute somewhere to run the Toil worker process

  • job_desc (toil.job.JobDescription) – the JobDescription for the job being run

  • job_environment (Optional[Dict[str, str]]) – a collection of job-specific environment variables to be set on the worker.

Returns:

a unique job ID number that can be used to reference the newly issued job

Return type:

int

getUpdatedBatchJob(maxWait)

Returns information about job that has updated its status (i.e. ceased running, either successfully or with an error). Each such job will be returned exactly once.

Does not return info for jobs killed by killBatchJobs, although they may cause None to be returned earlier than maxWait.

Parameters:

maxWait (int) – the number of seconds to block, waiting for a result

Returns:

If a result is available, returns UpdatedBatchJobInfo. Otherwise it returns None. wallTime is the number of seconds (a strictly positive float) in wall-clock time the job ran for, or None if this batch system does not support tracking wall time.

Return type:

Optional[toil.batchSystems.abstractBatchSystem.UpdatedBatchJobInfo]

shutdown()

Called at the completion of a toil invocation. Should cleanly terminate all worker threads.

Return type:

None

getIssuedBatchJobIDs()

Gets all currently issued jobs

Returns:

A list of jobs (as job ID numbers) currently issued (may be running, or may be waiting to be run). Despite the result being a list, the ordering should not be depended upon.

Return type:

List[int]

getRunningBatchJobIDs()

Gets a map of jobs as job ID numbers that are currently running (not just waiting) and how long they have been running, in seconds.

Returns:

dictionary with currently running job ID number keys and how many seconds they have been running as the value

Return type:

Dict[int, float]

killBatchJobs(job_ids)

Kills the given job IDs. After returning, the killed jobs will not appear in the results of getRunningBatchJobIDs. The killed job will not be returned from getUpdatedBatchJob.

Parameters:
  • jobIDs – list of IDs of jobs to kill

  • job_ids (List[int])

Return type:

None

classmethod add_options(parser)

If this batch system provides any command line options, add them to the given parser.

Parameters:

parser (Union[argparse.ArgumentParser, argparse._ArgumentGroup])

Return type:

None

classmethod setOptions(setOption)

Process command line or configuration options relevant to this batch system.

Parameters:

setOption (toil.batchSystems.options.OptionSetter) – A function with signature setOption(option_name, parsing_function=None, check_function=None, default=None, env=None) returning nothing, used to update run configuration as a side effect.

Return type:

None