if size == 0 or offset >= self.size():
return b''
readsegs = locators_and_ranges(self._segments, offset, size)
- prefetch = locators_and_ranges(self._segments, offset + size, config.KEEP_BLOCK_SIZE * self.parent._my_block_manager()._keep.num_prefetch_threads, limit=32)
+ if self.parent._my_block_manager()._keep.num_prefetch_threads > 0:
+ prefetch = locators_and_ranges(self._segments, offset + size, config.KEEP_BLOCK_SIZE * self.parent._my_block_manager()._keep.num_prefetch_threads, limit=32)
locs = set()
data = []
block = self.parent._my_block_manager().get_block_contents(lr.locator, num_retries=num_retries, cache_only=(bool(data) and not exact))
if block:
blockview = memoryview(block)
- data.append(blockview[lr.segment_offset:lr.segment_offset+lr.segment_size].tobytes())
+ data.append(blockview[lr.segment_offset:lr.segment_offset+lr.segment_size])
locs.add(lr.locator)
else:
break
- for lr in prefetch:
- if lr.locator not in locs:
- self.parent._my_block_manager().block_prefetch(lr.locator)
- locs.add(lr.locator)
+ if self.parent._my_block_manager()._keep.num_prefetch_threads > 0:
+ for lr in prefetch:
+ if lr.locator not in locs:
+ self.parent._my_block_manager().block_prefetch(lr.locator)
+ locs.add(lr.locator)
- return b''.join(data)
+ if len(data) == 1:
+ return data[0]
+ else:
+ return b''.join(data)
@must_be_writable
@synchronized