diff options
Diffstat (limited to 'python/pyspark/shuffle.py')
| -rw-r--r-- | python/pyspark/shuffle.py | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/python/pyspark/shuffle.py b/python/pyspark/shuffle.py index e3923d1c36..2c68cd4921 100644 --- a/python/pyspark/shuffle.py +++ b/python/pyspark/shuffle.py @@ -45,7 +45,7 @@ except ImportError: return int(line.split()[1]) >> 10 else: warnings.warn("Please install psutil to have better " - "support with spilling") + "support with spilling") if platform.system() == "Darwin": import resource rss = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss @@ -141,7 +141,7 @@ class ExternalMerger(Merger): This class works as follows: - - It repeatedly combine the items and save them in one dict in + - It repeatedly combine the items and save them in one dict in memory. - When the used memory goes above memory limit, it will split @@ -190,12 +190,12 @@ class ExternalMerger(Merger): MAX_TOTAL_PARTITIONS = 4096 def __init__(self, aggregator, memory_limit=512, serializer=None, - localdirs=None, scale=1, partitions=59, batch=1000): + localdirs=None, scale=1, partitions=59, batch=1000): Merger.__init__(self, aggregator) self.memory_limit = memory_limit # default serializer is only used for tests self.serializer = serializer or \ - BatchedSerializer(PickleSerializer(), 1024) + BatchedSerializer(PickleSerializer(), 1024) self.localdirs = localdirs or self._get_dirs() # number of partitions when spill data into disks self.partitions = partitions @@ -341,7 +341,7 @@ class ExternalMerger(Merger): self.pdata[i].clear() self.spills += 1 - gc.collect() # release the memory as much as possible + gc.collect() # release the memory as much as possible def iteritems(self): """ Return all merged items as iterator """ @@ -370,8 +370,8 @@ class ExternalMerger(Merger): if (self.scale * self.partitions < self.MAX_TOTAL_PARTITIONS and j < self.spills - 1 and get_used_memory() > hard_limit): - self.data.clear() # will read from disk again - gc.collect() # release the memory as much as possible + self.data.clear() # will read from disk again + gc.collect() # release the memory as much as possible for v in self._recursive_merged_items(i): yield v return @@ -409,9 +409,9 @@ class ExternalMerger(Merger): for i in range(start, self.partitions): subdirs = [os.path.join(d, "parts", str(i)) - for d in self.localdirs] + for d in self.localdirs] m = ExternalMerger(self.agg, self.memory_limit, self.serializer, - subdirs, self.scale * self.partitions) + subdirs, self.scale * self.partitions) m.pdata = [{} for _ in range(self.partitions)] limit = self._next_limit() @@ -419,7 +419,7 @@ class ExternalMerger(Merger): path = self._get_spill_dir(j) p = os.path.join(path, str(i)) m._partitioned_mergeCombiners( - self.serializer.load_stream(open(p))) + self.serializer.load_stream(open(p))) if get_used_memory() > limit: m._spill() |