Index

_

__init__() (parsl.app.app.AppBase method) (parsl.app.bash.BashApp method) (parsl.app.futures.DataFuture method) (parsl.app.python.PythonApp method) (parsl.config.Config method) (parsl.data_provider.data_manager.DataManager method) (parsl.data_provider.file_noop.NoOpFileStaging method) (parsl.data_provider.files.File method) (parsl.data_provider.ftp.FTPInTaskStaging method) (parsl.data_provider.ftp.FTPSeparateTaskStaging method) (parsl.data_provider.globus.GlobusStaging method) (parsl.data_provider.http.HTTPInTaskStaging method) (parsl.data_provider.http.HTTPSeparateTaskStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) (parsl.dataflow.dependency_resolvers.DependencyResolver method) (parsl.dataflow.dflow.DataFlowKernel method) (parsl.dataflow.dflow.DataFlowKernelLoader method) (parsl.dataflow.futures.AppFuture method) (parsl.dataflow.memoization.Memoizer method) (parsl.dataflow.states.States method) (parsl.dataflow.taskrecord.TaskRecord method) (parsl.executors.base.ParslExecutor method) (parsl.executors.FluxExecutor method) (parsl.executors.HighThroughputExecutor method) (parsl.executors.MPIExecutor method) (parsl.executors.radical.RadicalPilotExecutor method) (parsl.executors.status_handling.BlockProviderExecutor method) (parsl.executors.taskvine.TaskVineExecutor method) (parsl.executors.ThreadPoolExecutor method) (parsl.executors.WorkQueueExecutor method) (parsl.jobs.job_status_poller.JobStatusPoller method) (parsl.jobs.states.JobState method) (parsl.jobs.states.JobStatus method) (parsl.jobs.strategy.Strategy method) (parsl.launchers.AprunLauncher method) (parsl.launchers.base.Launcher method) (parsl.launchers.GnuParallelLauncher method) (parsl.launchers.JsrunLauncher method) (parsl.launchers.MpiExecLauncher method) (parsl.launchers.MpiRunLauncher method) (parsl.launchers.SimpleLauncher method) (parsl.launchers.SingleNodeLauncher method) (parsl.launchers.SrunLauncher method) (parsl.launchers.SrunMPILauncher method) (parsl.launchers.WrappedLauncher method) (parsl.monitoring.MonitoringHub method) (parsl.providers.AWSProvider method) (parsl.providers.base.ExecutionProvider method) (parsl.providers.cluster_provider.ClusterProvider method) (parsl.providers.CobaltProvider method) (parsl.providers.CondorProvider method) (parsl.providers.GoogleCloudProvider method) (parsl.providers.GridEngineProvider method) (parsl.providers.KubernetesProvider method) (parsl.providers.LocalProvider method) (parsl.providers.LSFProvider method) (parsl.providers.PBSProProvider method) (parsl.providers.SlurmProvider method) (parsl.providers.TorqueProvider method) (parsl.utils.Timer method)

A

add_executors() (parsl.dataflow.dflow.DataFlowKernel method) (parsl.jobs.job_status_poller.JobStatusPoller method) (parsl.jobs.strategy.Strategy method) address_by_hostname() (in module parsl.addresses) address_by_interface() (in module parsl.addresses) address_by_query() (in module parsl.addresses) address_by_route() (in module parsl.addresses) app_fu (parsl.dataflow.taskrecord.TaskRecord attribute) AppBadFormatting

AppBase (class in parsl.app.app) AppException AppFuture (class in parsl.dataflow.futures) AppTimeout AprunLauncher (class in parsl.launchers) args (parsl.dataflow.taskrecord.TaskRecord attribute) atexit_cleanup() (parsl.dataflow.dflow.DataFlowKernel method) AuthException AWSProvider (class in parsl.providers)

B

bad_state_is_set (parsl.executors.status_handling.BlockProviderExecutor property) BadCheckpoint BadHostKeyException BadLauncher BadMessage BadPermsScriptPath BadScriptPath

BadStdStreamFile bash_app() (in module parsl.app.app) BashApp (class in parsl.app.bash) BashAppNoReturn BashExitFailure BlockProviderExecutor (class in parsl.executors.status_handling) bye() (parsl.providers.GoogleCloudProvider method)

C

can_stage_in() (parsl.data_provider.file_noop.NoOpFileStaging method) (parsl.data_provider.ftp.FTPInTaskStaging method) (parsl.data_provider.ftp.FTPSeparateTaskStaging method) (parsl.data_provider.globus.GlobusStaging method) (parsl.data_provider.http.HTTPInTaskStaging method) (parsl.data_provider.http.HTTPSeparateTaskStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) can_stage_out() (parsl.data_provider.file_noop.NoOpFileStaging method) (parsl.data_provider.globus.GlobusStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) cancel() (parsl.app.futures.DataFuture method) (parsl.dataflow.futures.AppFuture method) (parsl.providers.AWSProvider method) (parsl.providers.base.ExecutionProvider method) (parsl.providers.CobaltProvider method) (parsl.providers.CondorProvider method) (parsl.providers.GoogleCloudProvider method) (parsl.providers.GridEngineProvider method) (parsl.providers.KubernetesProvider method) (parsl.providers.LocalProvider method) (parsl.providers.LSFProvider method) (parsl.providers.SlurmProvider method) (parsl.providers.TorqueProvider method) CANCELLED (parsl.jobs.states.JobState attribute) cancelled() (parsl.app.futures.DataFuture method) (parsl.dataflow.futures.AppFuture method)

ChannelError check_memo() (parsl.dataflow.memoization.Memoizer method) check_staging_inhibited() (parsl.dataflow.dflow.DataFlowKernel static method) checkpoint (parsl.dataflow.taskrecord.TaskRecord attribute) checkpoint() (parsl.dataflow.dflow.DataFlowKernel method) cleancopy() (parsl.data_provider.files.File method) cleanup() (parsl.dataflow.dflow.DataFlowKernel method) clear() (parsl.dataflow.dflow.DataFlowKernelLoader class method) close() (parsl.jobs.job_status_poller.JobStatusPoller method) (parsl.monitoring.MonitoringHub method) (parsl.utils.Timer method) ClusterProvider (class in parsl.providers.cluster_provider) CobaltProvider (class in parsl.providers) COMPLETED (parsl.jobs.states.JobState attribute) CondorProvider (class in parsl.providers) Config (class in parsl.config) config (parsl.dataflow.dflow.DataFlowKernel property) config_route_table() (parsl.providers.AWSProvider method) ConfigurationError connected_blocks() (parsl.executors.HighThroughputExecutor method) connected_managers() (parsl.executors.HighThroughputExecutor method) connected_workers (parsl.executors.HighThroughputExecutor property) cores_per_node (parsl.providers.base.ExecutionProvider property) create_instance() (parsl.providers.GoogleCloudProvider method) create_monitoring_info() (parsl.executors.status_handling.BlockProviderExecutor method) create_name_tag_spec() (parsl.providers.AWSProvider method) create_session() (parsl.providers.AWSProvider method) create_vpc() (parsl.providers.AWSProvider method)

D

DataFlowException DataFlowKernel (class in parsl.dataflow.dflow) DataFlowKernelLoader (class in parsl.dataflow.dflow) DataFuture (class in parsl.app.futures) DataManager (class in parsl.data_provider.data_manager) DEEP_DEPENDENCY_RESOLVER (in module parsl.dataflow.dependency_resolvers) DEFAULT_LAUNCH_CMD (parsl.executors.FluxExecutor attribute) default_std_autopath() (parsl.dataflow.dflow.DataFlowKernel method)

delete_instance() (parsl.providers.GoogleCloudProvider method) dep_fail (parsl.dataflow.states.States attribute) DependencyError DependencyResolver (class in parsl.dataflow.dependency_resolvers) depends (parsl.dataflow.taskrecord.TaskRecord attribute) DeserializationError dfk (parsl.dataflow.taskrecord.TaskRecord attribute) dfk() (parsl.dataflow.dflow.DataFlowKernelLoader class method)

E

enable_mpi_mode (parsl.executors.HighThroughputExecutor attribute) exec_done (parsl.dataflow.states.States attribute) exec_fu (parsl.dataflow.taskrecord.TaskRecord attribute) execute_wait() (parsl.providers.cluster_provider.ClusterProvider method) ExecutionProvider (class in parsl.providers.base)

ExecutionProviderException executor (parsl.dataflow.taskrecord.TaskRecord attribute) executor_exception (parsl.executors.status_handling.BlockProviderExecutor property) ExecutorError executors (parsl.config.Config property)

F

fail_cost (parsl.dataflow.taskrecord.TaskRecord attribute) fail_count (parsl.dataflow.taskrecord.TaskRecord attribute) fail_history (parsl.dataflow.taskrecord.TaskRecord attribute) fail_retryable (parsl.dataflow.states.States attribute) failed (parsl.dataflow.states.States attribute) FAILED (parsl.jobs.states.JobState attribute) File (class in parsl.data_provider.files) FileCopyException FileExists filename (parsl.app.futures.DataFuture property)

filepath (parsl.app.futures.DataFuture property) (parsl.data_provider.files.File property) FINAL_STATES (in module parsl.dataflow.states) FluxExecutor (class in parsl.executors) fn_hash (parsl.dataflow.taskrecord.TaskRecord attribute) from_memo (parsl.dataflow.taskrecord.TaskRecord attribute) FTPInTaskStaging (class in parsl.data_provider.ftp) FTPSeparateTaskStaging (class in parsl.data_provider.ftp) func (parsl.dataflow.taskrecord.TaskRecord attribute) func_name (parsl.dataflow.taskrecord.TaskRecord attribute)

G

generate_aws_id() (parsl.providers.AWSProvider method) get_all_checkpoints() (in module parsl.utils) get_configs() (parsl.providers.GridEngineProvider method) get_instance_state() (parsl.providers.AWSProvider method) get_last_checkpoint() (in module parsl.utils) get_usage_information() (parsl.config.Config method) (parsl.executors.HighThroughputExecutor method)

get_zone() (parsl.providers.GoogleCloudProvider method) GlobusStaging (class in parsl.data_provider.globus) GnuParallelLauncher (class in parsl.launchers) goodbye() (parsl.providers.AWSProvider method) GoogleCloudProvider (class in parsl.providers) GridEngineProvider (class in parsl.providers)

H

handle_app_update() (parsl.dataflow.dflow.DataFlowKernel method) handle_errors() (parsl.executors.status_handling.BlockProviderExecutor method) handle_exec_update() (parsl.dataflow.dflow.DataFlowKernel method) handle_join_update() (parsl.dataflow.dflow.DataFlowKernel method) hash_lookup() (parsl.dataflow.memoization.Memoizer method) hashsum (parsl.dataflow.taskrecord.TaskRecord attribute)

HELD (parsl.jobs.states.JobState attribute) HighThroughputExecutor (class in parsl.executors) hold_worker() (parsl.executors.HighThroughputExecutor method) HTTPInTaskStaging (class in parsl.data_provider.http) HTTPSeparateTaskStaging (class in parsl.data_provider.http) hub_address (parsl.executors.base.ParslExecutor property) hub_zmq_port (parsl.executors.base.ParslExecutor property)

I

id (parsl.dataflow.taskrecord.TaskRecord attribute) id_for_memo() (in module parsl.dataflow.memoization) ignore_for_cache (parsl.dataflow.taskrecord.TaskRecord attribute) initialize_boto_client() (parsl.providers.AWSProvider method)

initialize_globus() (parsl.data_provider.globus.GlobusStaging method) initialize_scaling() (parsl.executors.HighThroughputExecutor method) (parsl.executors.taskvine.TaskVineExecutor method) (parsl.executors.WorkQueueExecutor method)

J

JobState (class in parsl.jobs.states) JobStatus (class in parsl.jobs.states) JobStatusPoller (class in parsl.jobs.job_status_poller) join (parsl.dataflow.taskrecord.TaskRecord attribute) join_app() (in module parsl.app.app)

join_lock (parsl.dataflow.taskrecord.TaskRecord attribute) JoinError joining (parsl.dataflow.states.States attribute) joins (parsl.dataflow.taskrecord.TaskRecord attribute) JsrunLauncher (class in parsl.launchers)

K

KubernetesProvider (class in parsl.providers)

kwargs (parsl.dataflow.taskrecord.TaskRecord attribute)

L

label (parsl.executors.base.ParslExecutor attribute) (parsl.providers.AWSProvider property) (parsl.providers.base.ExecutionProvider property) (parsl.providers.cluster_provider.ClusterProvider property) (parsl.providers.KubernetesProvider property) (parsl.providers.LocalProvider property) launch_if_ready() (parsl.dataflow.dflow.DataFlowKernel method) launch_task() (parsl.dataflow.dflow.DataFlowKernel method)

launched (parsl.dataflow.states.States attribute) Launcher (class in parsl.launchers.base) load() (parsl.dataflow.dflow.DataFlowKernelLoader class method) load_checkpoints() (parsl.dataflow.dflow.DataFlowKernel method) LocalProvider (class in parsl.providers) log_task_states() (parsl.dataflow.dflow.DataFlowKernel method) logdir (parsl.executors.HighThroughputExecutor property) LSFProvider (class in parsl.providers)

M

make_callback() (parsl.utils.Timer method) make_hash() (parsl.dataflow.memoization.Memoizer method) ManagerLost mem_per_node (parsl.providers.base.ExecutionProvider property) memo_done (parsl.dataflow.states.States attribute) memoize (parsl.dataflow.taskrecord.TaskRecord attribute) Memoizer (class in parsl.dataflow.memoization) MISSING (parsl.jobs.states.JobState attribute)

MissingOutputs monitor_resources() (parsl.executors.base.ParslExecutor method) (parsl.executors.ThreadPoolExecutor method) MonitoringHub (class in parsl.monitoring) mpi_launcher (parsl.executors.HighThroughputExecutor attribute) MpiExecLauncher (class in parsl.launchers) MPIExecutor (class in parsl.executors) MpiRunLauncher (class in parsl.launchers)

N

noop_error_handler() (in module parsl.jobs.error_handlers)

NoOpFileStaging (class in parsl.data_provider.file_noop)

O

optionally_stage_in() (parsl.data_provider.data_manager.DataManager method) OptionalModuleMissing outputs (parsl.dataflow.futures.AppFuture property)

outstanding (parsl.executors.HighThroughputExecutor property) (parsl.executors.status_handling.BlockProviderExecutor property) (parsl.executors.taskvine.TaskVineExecutor property) (parsl.executors.WorkQueueExecutor property)

P

parent_callback() (parsl.app.futures.DataFuture method) ParslError ParslExecutor (class in parsl.executors.base) PBSProProvider (class in parsl.providers) pending (parsl.dataflow.states.States attribute)

PENDING (parsl.jobs.states.JobState attribute) poll() (parsl.jobs.job_status_poller.JobStatusPoller method) poll_facade() (parsl.executors.status_handling.BlockProviderExecutor method) provider (parsl.executors.status_handling.BlockProviderExecutor property) python_app() (in module parsl.app.app) PythonApp (class in parsl.app.python)

R

RadicalPilotExecutor (class in parsl.executors.radical) radio_mode (parsl.executors.base.ParslExecutor attribute) (parsl.executors.HighThroughputExecutor attribute) (parsl.executors.taskvine.TaskVineExecutor attribute) (parsl.executors.WorkQueueExecutor attribute) read_state_file() (parsl.providers.AWSProvider method) replace_task() (parsl.data_provider.data_manager.DataManager method) (parsl.data_provider.ftp.FTPInTaskStaging method) (parsl.data_provider.http.HTTPInTaskStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method)

replace_task_stage_out() (parsl.data_provider.data_manager.DataManager method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) resource_specification (parsl.dataflow.taskrecord.TaskRecord attribute) retries_left (parsl.dataflow.taskrecord.TaskRecord attribute) RSyncStaging (class in parsl.data_provider.rsync) run_dir (parsl.executors.base.ParslExecutor property) run_id (parsl.executors.base.ParslExecutor property) running (parsl.dataflow.states.States attribute) RUNNING (parsl.jobs.states.JobState attribute) running() (parsl.app.futures.DataFuture method) running_ended (parsl.dataflow.states.States attribute)

S

scale_in() (parsl.executors.HighThroughputExecutor method) (parsl.executors.status_handling.BlockProviderExecutor method) scale_in_facade() (parsl.executors.status_handling.BlockProviderExecutor method) scale_out_facade() (parsl.executors.status_handling.BlockProviderExecutor method) SCALED_IN (parsl.jobs.states.JobState attribute) ScaleOutFailed ScalingFailed SchedulerMissingArgs ScriptPathError security_group() (parsl.providers.AWSProvider method) send() (parsl.monitoring.MonitoringHub method) send_monitoring_info() (parsl.executors.status_handling.BlockProviderExecutor method) SerializationError set_bad_state_and_fail_all() (parsl.executors.status_handling.BlockProviderExecutor method) set_file_logger() (in module parsl) set_stream_logger() (in module parsl) SHALLOW_DEPENDENCY_RESOLVER (in module parsl.dataflow.dependency_resolvers) show_summary() (parsl.providers.AWSProvider method) shut_down_instance() (parsl.providers.AWSProvider method) shutdown() (parsl.executors.base.ParslExecutor method) (parsl.executors.FluxExecutor method) (parsl.executors.HighThroughputExecutor method) (parsl.executors.radical.RadicalPilotExecutor method) (parsl.executors.taskvine.TaskVineExecutor method) (parsl.executors.ThreadPoolExecutor method) (parsl.executors.WorkQueueExecutor method) simple_error_handler() (in module parsl.jobs.error_handlers) SimpleLauncher (class in parsl.launchers) SingleNodeLauncher (class in parsl.launchers) SlurmProvider (class in parsl.providers) spin_up_instance() (parsl.providers.AWSProvider method) SrunLauncher (class in parsl.launchers) SrunMPILauncher (class in parsl.launchers) SSHException stage_in() (parsl.data_provider.data_manager.DataManager method) (parsl.data_provider.ftp.FTPInTaskStaging method) (parsl.data_provider.ftp.FTPSeparateTaskStaging method) (parsl.data_provider.globus.GlobusStaging method) (parsl.data_provider.http.HTTPInTaskStaging method) (parsl.data_provider.http.HTTPSeparateTaskStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) stage_out() (parsl.data_provider.data_manager.DataManager method) (parsl.data_provider.globus.GlobusStaging method) (parsl.data_provider.rsync.RSyncStaging method) (parsl.data_provider.staging.Staging method) Staging (class in parsl.data_provider.staging) start() (parsl.executors.base.ParslExecutor method) (parsl.executors.FluxExecutor method) (parsl.executors.HighThroughputExecutor method) (parsl.executors.radical.RadicalPilotExecutor method) (parsl.executors.taskvine.TaskVineExecutor method) (parsl.executors.ThreadPoolExecutor method) (parsl.executors.WorkQueueExecutor method) (parsl.monitoring.MonitoringHub method)

States (class in parsl.dataflow.states) status (parsl.dataflow.taskrecord.TaskRecord attribute) status() (parsl.executors.HighThroughputExecutor method) (parsl.executors.status_handling.BlockProviderExecutor method) (parsl.providers.AWSProvider method) (parsl.providers.base.ExecutionProvider method) (parsl.providers.cluster_provider.ClusterProvider method) (parsl.providers.CondorProvider method) (parsl.providers.GoogleCloudProvider method) (parsl.providers.KubernetesProvider method) (parsl.providers.LocalProvider method) status_facade (parsl.executors.status_handling.BlockProviderExecutor property) status_name (parsl.jobs.states.JobStatus property) status_polling_interval (parsl.executors.status_handling.BlockProviderExecutor property) (parsl.providers.AWSProvider property) (parsl.providers.base.ExecutionProvider property) (parsl.providers.CobaltProvider property) (parsl.providers.CondorProvider property) (parsl.providers.GoogleCloudProvider property) (parsl.providers.GridEngineProvider property) (parsl.providers.KubernetesProvider property) (parsl.providers.LocalProvider property) (parsl.providers.LSFProvider property) (parsl.providers.PBSProProvider property) (parsl.providers.SlurmProvider property) (parsl.providers.TorqueProvider property) stderr (parsl.dataflow.futures.AppFuture property) (parsl.jobs.states.JobStatus property) stderr_summary (parsl.jobs.states.JobStatus property) stdout (parsl.dataflow.futures.AppFuture property) (parsl.jobs.states.JobStatus property) stdout_summary (parsl.jobs.states.JobStatus property) Strategy (class in parsl.jobs.strategy) submit() (parsl.dataflow.dflow.DataFlowKernel method) (parsl.executors.base.ParslExecutor method) (parsl.executors.FluxExecutor method) (parsl.executors.HighThroughputExecutor method) (parsl.executors.radical.RadicalPilotExecutor method) (parsl.executors.taskvine.TaskVineExecutor method) (parsl.executors.ThreadPoolExecutor method) (parsl.executors.WorkQueueExecutor method) (parsl.providers.AWSProvider method) (parsl.providers.base.ExecutionProvider method) (parsl.providers.CobaltProvider method) (parsl.providers.CondorProvider method) (parsl.providers.GoogleCloudProvider method) (parsl.providers.GridEngineProvider method) (parsl.providers.KubernetesProvider method) (parsl.providers.LocalProvider method) (parsl.providers.LSFProvider method) (parsl.providers.PBSProProvider method) (parsl.providers.SlurmProvider method) (parsl.providers.TorqueProvider method) submit_monitoring_radio (parsl.executors.base.ParslExecutor property) SUMMARY_TRUNCATION_THRESHOLD (parsl.jobs.states.JobStatus attribute)

T

task_launch_lock (parsl.dataflow.taskrecord.TaskRecord attribute) task_state_cb() (parsl.executors.radical.RadicalPilotExecutor method) task_status() (parsl.dataflow.futures.AppFuture method) task_translate() (parsl.executors.radical.RadicalPilotExecutor method) TaskRecord (class in parsl.dataflow.taskrecord) tasks (parsl.executors.status_handling.BlockProviderExecutor property) TaskVineExecutor (class in parsl.executors.taskvine) teardown() (parsl.providers.AWSProvider method) terminal (parsl.jobs.states.JobStatus property) ThreadPoolExecutor (class in parsl.executors) tid (parsl.app.futures.DataFuture property) (parsl.dataflow.futures.AppFuture property)

time_invoked (parsl.dataflow.taskrecord.TaskRecord attribute) time_returned (parsl.dataflow.taskrecord.TaskRecord attribute) TIMEOUT (parsl.jobs.states.JobState attribute) Timer (class in parsl.utils) TorqueProvider (class in parsl.providers) traverse_to_gather (parsl.dataflow.dependency_resolvers.DependencyResolver attribute) traverse_to_unwrap (parsl.dataflow.dependency_resolvers.DependencyResolver attribute) try_id (parsl.dataflow.taskrecord.TaskRecord attribute) try_time_launched (parsl.dataflow.taskrecord.TaskRecord attribute) try_time_returned (parsl.dataflow.taskrecord.TaskRecord attribute)

U

UNKNOWN (parsl.jobs.states.JobState attribute) unsched (parsl.dataflow.states.States attribute)

unwrap() (parsl.executors.radical.RadicalPilotExecutor method) update_memo() (parsl.dataflow.memoization.Memoizer method) update_task_state() (parsl.dataflow.dflow.DataFlowKernel method)

V

validate_resource_spec() (parsl.executors.HighThroughputExecutor method) (parsl.executors.MPIExecutor method)

validate_usage_tracking() (parsl.config.Config method)

W

wait_for_current_tasks() (parsl.dataflow.dflow.DataFlowKernel method) (parsl.dataflow.dflow.DataFlowKernelLoader class method) windowed_error_handler() (in module parsl.jobs.error_handlers) wipe_task() (parsl.dataflow.dflow.DataFlowKernel method) worker_logdir (parsl.executors.HighThroughputExecutor property) WorkerLost

workers_per_node (parsl.executors.HighThroughputExecutor property) (parsl.executors.status_handling.BlockProviderExecutor property) (parsl.executors.taskvine.TaskVineExecutor property) (parsl.executors.WorkQueueExecutor property) WorkQueueExecutor (class in parsl.executors) WrappedLauncher (class in parsl.launchers) write_state_file() (parsl.providers.AWSProvider method)

X

xstr() (parsl.providers.AWSProvider method)