def classic_iterator(urls,
reader=task_io.chain_reader,
input_stream=(func.map_input_stream, ),
notifier=func.notifier,
params=None,
ddfs=None):
"""
An iterator over records as seen by the classic map interface.
:type reader: :func:`disco.worker.task_io.input_stream`
:param reader: shortcut for the last input stream applied.
:type input_stream: sequence of :func:`disco.worker.task_io.input_stream`
:param input_stream: used to read from a custom file format.
:type notifier: :func:`disco.func.notifier`
:param notifier: called when the task opens a url.
"""
from disco.worker import Input
from disco.worker.classic.worker import Worker
worker = Worker(map_reader=reader, map_input_stream=input_stream)
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
for input in util.inputlist(urls, settings=settings):
if isinstance(input, basestring):
dest = proxy_url(input, to_master=False)
elif isinstance(input, tuple):
dest = tuple([proxy_url(i, to_master=False) for i in input])
else:
dest = [proxy_url(i, to_master=False) for i in input]
notifier(dest)
for record in Input(dest, open=worker.opener('map', 'in', params)):
yield record
def classic_iterator(urls,
reader=func.chain_reader,
input_stream=(func.map_input_stream, ),
notifier=func.notifier,
params=None,
ddfs=None):
"""
An iterator over records as seen by the classic map interface.
:type reader: :func:`disco.classic.worker.func.input_stream`
:param reader: shortcut for the last input stream applied.
:type input_stream: sequence of :func:`disco.classic.worker.func.input_stream`
:param input_stream: used to read from a custom file format.
:type notifier: :func:`disco.classic.worker.func.notifier`
:param notifier: called when the task opens a url.
"""
from disco.worker import Input
from disco.worker.classic.worker import Worker
worker = Worker(map_reader=reader, map_input_stream=input_stream)
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
for input in util.inputlist(urls, settings=settings):
notifier(input)
for record in Input(input, open=worker.opener('map', 'in', params)):
yield record
def reduce_input(self, task, params):
# master should feed only the partitioned inputs to reduce (and shuffle them?)
from disco.worker import SerialInput
from disco.util import inputlist, ispartitioned, shuffled
inputs = [[url for rid, url in i.replicas] for i in self.get_inputs()]
label = None
if ispartitioned(inputs):
label = task.group_label
return self.sort(SerialInput(shuffled(inputlist(inputs, label=label)),
task=task,
open=self.opener('reduce', 'in', params)),
task)
def reduce_input(self, task, params):
# master should feed only the partitioned inputs to reduce (and shuffle them?)
from disco.worker import SerialInput
from disco.util import inputlist, ispartitioned, shuffled
inputs = [[url for rid, url in i.replicas] for i in self.get_inputs()]
label = None
if ispartitioned(inputs) and not self['merge_partitions']:
label = task.group_label
return self.sort(SerialInput(shuffled(inputlist(inputs, label=label)),
task=task,
open=self.opener('reduce', 'in', params)),
task)
def reduce_input(self, task, params):
# master should feed only the partitioned inputs to reduce (and shuffle them?)
from disco.worker import SerialInput
from disco.util import inputlist, ispartitioned, shuffled
inputs = [[url for rid, url in i.replicas] for i in self.get_inputs()]
partition = None
if ispartitioned(inputs) and not self['merge_partitions']:
partition = str(task.taskid)
return self.sort(SerialInput(shuffled(inputlist(inputs, partition=partition)),
task=task,
open=self.opener('reduce', 'in', params)),
task)
def jobdict(self, job, **jobargs):
"""
Creates :ref:`jobdict` for the :class:`Worker`.
Makes use of the following parameters, in addition to those
defined by the :class:`Worker` itself:
Uses :meth:`getitem` to resolve the values of parameters.
:return: the :term:`job dict`.
"""
from disco.error import DiscoError
def get(key, default=None):
return self.getitem(key, job, jobargs, default)
stages, pipeline = set(), []
for stage in get('pipeline', []):
if len(stage) == 2:
g, s = stage
concurrent = False
elif len(stage) == 3:
g, s, concurrent = stage
else:
raise DiscoError("Bad Stage {0}".format(stage))
if g not in self.group_ops:
raise DiscoError("Unknown grouping {0}".format(g))
if s.name in stages:
raise DiscoError("Repeated stage {0}".format(s.name))
stages.add(s.name)
pipeline.append((s.name, g, concurrent))
from disco.util import isiterable, inputlist
job_input = get('input', [])
if not isiterable(job_input):
raise DiscoError("Job 'input' is not a list of input locations,"
"or a list of such lists: {0}".format(job_input))
input = inputlist(job_input, label=None, settings=job.settings)
pipe_input = [[0, 0, inp] for inp in input]
jobdict = super(Worker, self).jobdict(job, **jobargs)
jobdict.update({
'worker': self.bin,
'pipeline': pipeline,
'inputs': pipe_input
})
return jobdict
def jobdict(self, job, **jobargs):
"""
Creates :ref:`jobdict` for the :class:`Worker`.
Makes use of the following parameters, in addition to those
defined by the :class:`Worker` itself:
Uses :meth:`getitem` to resolve the values of parameters.
:return: the :term:`job dict`.
"""
from disco.error import DiscoError
def get(key, default=None):
return self.getitem(key, job, jobargs, default)
stages, pipeline = set(), []
for stage in get("pipeline", []):
if len(stage) == 2:
g, s = stage
concurrent = False
elif len(stage) == 3:
g, s, concurrent = stage
else:
raise DiscoError("Bad Stage {0}".format(stage))
if g not in self.group_ops:
raise DiscoError("Unknown grouping {0}".format(g))
if s.name in stages:
raise DiscoError("Repeated stage {0}".format(s.name))
stages.add(s.name)
pipeline.append((s.name, g, concurrent))
from disco.util import isiterable, inputlist
job_input = get("input", [])
if not isiterable(job_input):
raise DiscoError(
"Job 'input' is not a list of input locations," "or a list of such lists: {0}".format(job_input)
)
input = inputlist(job_input, label=None, settings=job.settings)
pipe_input = [[0, 0, inp] for inp in input]
jobdict = super(Worker, self).jobdict(job, **jobargs)
jobdict.update({"worker": self.bin, "pipeline": pipeline, "inputs": pipe_input})
return jobdict
def sorted_iterator(urls,
reader=func.chain_reader,
input_stream=(func.map_input_stream, ),
notifier=func.notifier,
params=None,
ddfs=None):
from disco.worker import Input
from disco.worker.classic.worker import Worker
worker = Worker(map_reader=reader, map_input_stream=input_stream)
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
inputs = []
for input in util.inputlist(urls, settings=settings):
notifier(input)
instream = Input(input, open=worker.opener('map', 'in', params))
if instream:
inputs.append(instream)
return SortedIterator(inputs)
def sorted_iterator(urls,
reader=func.chain_reader,
input_stream=(func.map_input_stream,),
notifier=func.notifier,
params=None,
ddfs=None):
from disco.worker import Input
from disco.worker.classic.worker import Worker
worker = Worker(map_reader=reader, map_input_stream=input_stream)
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
inputs = []
for input in util.inputlist(urls, settings=settings):
notifier(input)
instream = Input(input, open=worker.opener('map', 'in', params))
if instream:
inputs.append(instream)
return SortedIterator(inputs)
def result_iterator(urls,
reader=task_io.chain_reader,
input_stream=(func.map_input_stream, ),
notifier=func.notifier,
params=None,
ddfs=None):
"""
An iterator over records stored in either disco or ddfs.
:type reader: :func:`disco.worker.task_io.input_stream`
:param reader: shortcut for the last input stream applied.
:type input_stream: sequence of :func:`disco.worker.task_io.input_stream`
:param input_stream: used to read from a custom file format.
:type notifier: :func:`disco.func.notifier`
:param notifier: called when the task opens a url.
"""
from disco.worker import Input
from disco.worker.task_io import StreamCombiner
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
for input in util.inputlist(urls, settings=settings):
if isinstance(input, basestring):
dest = proxy_url(input, to_master=False)
elif isinstance(input, tuple):
dest = tuple([proxy_url(i, to_master=False) for i in input])
else:
dest = [proxy_url(i, to_master=False) for i in input]
notifier(dest)
def open(url):
streams = [s for s in input_stream]
if reader:
streams += [reader]
return StreamCombiner(url, streams, params)
for record in Input(dest, open=open):
yield record
def result_iterator(urls,
reader=task_io.chain_reader,
input_stream=(func.map_input_stream, ),
notifier=func.notifier,
params=None,
ddfs=None):
"""
An iterator over records stored in either disco or ddfs.
:type reader: :func:`disco.worker.task_io.input_stream`
:param reader: shortcut for the last input stream applied.
:type input_stream: sequence of :func:`disco.worker.task_io.input_stream`
:param input_stream: used to read from a custom file format.
:type notifier: :func:`disco.func.notifier`
:param notifier: called when the task opens a url.
"""
from disco.worker import Input
from disco.worker.task_io import StreamCombiner
settings = DiscoSettings(DISCO_MASTER=ddfs) if ddfs else DiscoSettings()
for input in util.inputlist(urls, settings=settings):
if isinstance(input, basestring):
dest = proxy_url(input, to_master=False)
elif isinstance(input, tuple):
dest = tuple([proxy_url(i, to_master=False) for i in input])
else:
dest = [proxy_url(i, to_master=False) for i in input]
notifier(dest)
def open(url):
streams = [s for s in input_stream]
if reader:
streams += [reader]
return StreamCombiner(url, streams, params)
for record in Input(dest, open=open):
yield record
def open(url, task=None):
partition = str(task.taskid) if task else None
return SerialInput(shuffled(inputlist([url], partition=partition)),
open=lambda url: schemes.open_chain(url, task=task))
def open(url, task=None):
partition = str(task.taskid) if task else None
return SerialInput(shuffled(inputlist([url], partition=partition)),
open=lambda url: schemes.open_chain(url, task=task))
def jobdict(self, job, **jobargs):
"""
Creates :ref:`jobdict` for the :class:`Worker`.
Makes use of the following parameters,
in addition to those defined by the :class:`Worker` itself:
:type input: list of urls or list of list of urls
:param input: used to set :attr:`jobdict.input`.
Disco natively handles the following url schemes:
* ``http://...`` - any HTTP address
* ``file://...`` or no scheme - a local file.
The file must exist on all nodes where the tasks are run.
Due to these restrictions, this form has only limited use.
* ``tag://...`` - a tag stored in :ref:`DDFS`
* ``raw://...`` - pseudo-address: use the address itself as data.
* ``dir://...`` - used by Disco internally.
* ``disco://...`` - used by Disco internally.
.. seealso:: :mod:`disco.schemes`.
:type name: string
:param name: directly sets :attr:`jobdict.prefix`.
:type owner: string
:param owner: directly sets :attr:`jobdict.owner`.
If not specified, uses :envvar:`DISCO_JOB_OWNER`.
:type scheduler: dict
:param scheduler: directly sets :attr:`jobdict.scheduler`.
Uses :meth:`getitem` to resolve the values of parameters.
:return: the :term:`job dict`.
"""
from disco.util import isiterable, inputlist, ispartitioned, read_index
from disco.error import DiscoError
def get(key, default=None):
return self.getitem(key, job, jobargs, default)
has_map = bool(get('map'))
has_reduce = bool(get('reduce'))
job_input = get('input', [])
if not isiterable(job_input):
raise DiscoError("Job 'input' is not a list of input locations,"
"or a list of such lists: {0}".format(job_input))
input = inputlist(job_input,
partition=None if has_map else False,
settings=job.settings)
# -- nr_reduces --
# ignored if there is not actually a reduce specified
# XXX: master should always handle this
if has_map:
# partitioned map has N reduces; non-partitioned map has 1 reduce
nr_reduces = get('partitions') or 1
elif ispartitioned(input):
# no map, with partitions: len(dir://) specifies nr_reduces
nr_reduces = 1 + max(int(id)
for dir in input
for id, url in read_index(dir))
else:
# no map, without partitions can only have 1 reduce
nr_reduces = 1
if get('merge_partitions'):
nr_reduces = 1
return {'input': input,
'worker': self.bin,
'map?': has_map,
'reduce?': has_reduce,
'nr_reduces': nr_reduces,
'prefix': get('name'),
'scheduler': get('scheduler', {}),
'owner': get('owner', job.settings['DISCO_JOB_OWNER'])}
def jobdict(self, job, **jobargs):
"""
Creates :ref:`jobdict` for the :class:`Worker`.
Makes use of the following parameters,
in addition to those defined by the :class:`Worker` itself:
:type input: list of urls or list of list of urls
:param input: used to set :attr:`jobdict.input`.
Disco natively handles the following url schemes:
* ``http://...`` - any HTTP address
* ``file://...`` or no scheme - a local file.
The file must exist on all nodes where the tasks are run.
Due to these restrictions, this form has only limited use.
* ``tag://...`` - a tag stored in :ref:`DDFS`
* ``raw://...`` - pseudo-address: use the address itself as data.
* ``dir://...`` - used by Disco internally.
* ``disco://...`` - used by Disco internally.
.. seealso:: :mod:`disco.schemes`.
:type name: string
:param name: directly sets :attr:`jobdict.prefix`.
:type owner: string
:param owner: directly sets :attr:`jobdict.owner`.
If not specified, uses :envvar:`DISCO_JOB_OWNER`.
:type scheduler: dict
:param scheduler: directly sets :attr:`jobdict.scheduler`.
Uses :meth:`getitem` to resolve the values of parameters.
:return: the :term:`job dict`.
"""
from disco.util import inputlist, ispartitioned, read_index
def get(key, default=None):
return self.getitem(key, job, jobargs, default)
has_map = bool(get('map'))
has_reduce = bool(get('reduce'))
input = inputlist(get('input', []),
partition=None if has_map else False,
settings=job.settings)
# -- nr_reduces --
# ignored if there is not actually a reduce specified
# XXX: master should always handle this
if has_map:
# partitioned map has N reduces; non-partitioned map has 1 reduce
nr_reduces = get('partitions') or 1
elif ispartitioned(input):
# no map, with partitions: len(dir://) specifies nr_reduces
nr_reduces = 1 + max(
int(id) for dir in input for id, url in read_index(dir))
else:
# no map, without partitions can only have 1 reduce
nr_reduces = 1
if get('merge_partitions'):
nr_reduces = 1
return {
'input': input,
'worker': self.bin,
'map?': has_map,
'reduce?': has_reduce,
'nr_reduces': nr_reduces,
'prefix': get('name'),
'scheduler': get('scheduler', {}),
'owner': get('owner', job.settings['DISCO_JOB_OWNER'])
}
def jobdict(self, job, **jobargs):
"""
Creates :ref:`jobdict` for the :class:`Worker`.
Makes use of the following parameters, in addition to those
defined by the :class:`Worker` itself:
:type input: list of urls or list of list of urls
:param input: used to set :attr:`jobdict.input`.
Disco natively handles the following url schemes:
* ``http://...`` - any HTTP address
* ``file://...`` or no scheme - a local file.
The file must exist on all nodes where the tasks are run.
Due to these restrictions, this form has only limited use.
* ``tag://...`` - a tag stored in :ref:`DDFS`
* ``raw://...`` - pseudo-address: use the address itself as data.
* ``dir://...`` - used by Disco internally.
* ``disco://...`` - used by Disco internally.
.. seealso:: :mod:`disco.schemes`.
:type scheduler: dict
:param scheduler: directly sets :attr:`jobdict.scheduler`.
.. deprecated:: 0.5
*scheduler* params are now ignored.
Uses :meth:`getitem` to resolve the values of parameters.
:return: the :term:`job dict`.
"""
from disco.util import isiterable, inputlist, ispartitioned, read_index
from disco.error import DiscoError
def get(key, default=None):
return self.getitem(key, job, jobargs, default)
has_map = bool(get('map'))
has_reduce = bool(get('reduce'))
job_input = get('input', [])
has_save_results = get('save', False) or get('save_results', False)
if not isiterable(job_input):
raise DiscoError("Job 'input' is not a list of input locations,"
"or a list of such lists: {0}".format(job_input))
input = inputlist(job_input,
label=None if has_map else False,
settings=job.settings)
# -- nr_reduces --
# ignored if there is not actually a reduce specified
# XXX: master should always handle this
if has_map:
# partitioned map has N reduces; non-partitioned map has 1 reduce
nr_reduces = get('partitions') or 1
elif ispartitioned(input):
# no map, with partitions: len(dir://) specifies nr_reduces
nr_reduces = 1 + max(int(id)
for dir in input
for id, url, size in read_index(dir))
else:
# no map, without partitions can only have 1 reduce
nr_reduces = 1
if get('merge_partitions'):
nr_reduces = 1
jobdict = super(Worker, self).jobdict(job, **jobargs)
jobdict.update({'input': input,
'worker': self.bin,
'map?': has_map,
'reduce?': has_reduce,
'nr_reduces': nr_reduces,
'save_results': has_save_results,
'scheduler': get('scheduler', {})})
return jobdict
def open(url, task=None):
label = task.group_label if task else None
return SerialInput(shuffled(inputlist([url], label=label)),
open=lambda url: schemes.open_chain(url, task=task))
def open(url, task=None):
label = task.group_label if task else None
return SerialInput(shuffled(inputlist([url], label=label)),
open=lambda url: schemes.open_chain(url, task=task))
