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encode.py: update comments, max_segment_size is now 2MiB

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Brian Warner 2007-10-16 11:00:29 -07:00
parent 9da1d70676
commit 6160af5f50
1 changed files with 2 additions and 2 deletions
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src/allmydata/encode.py
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@ -286,8 +286,8 @@ class Encoder(object):
# memory footprint: we only hold a tiny piece of the plaintext at any # memory footprint: we only hold a tiny piece of the plaintext at any
# given time. We build up a segment's worth of cryptttext, then hand # given time. We build up a segment's worth of cryptttext, then hand
# it to the encoder. Assuming 3-of-10 encoding (3.3x expansion) and # it to the encoder. Assuming 3-of-10 encoding (3.3x expansion) and
# 2MiB max_segment_size, we get a peak memory footprint of 4.3*2MiB = # 1MiB max_segment_size, we get a peak memory footprint of 4.3*1MiB =
# 8.6MiB. Lowering max_segment_size to, say, 100KiB would drop the # 4.3MiB. Lowering max_segment_size to, say, 100KiB would drop the
# footprint to 430KiB at the expense of more hash-tree overhead. # footprint to 430KiB at the expense of more hash-tree overhead.
d = self._gather_data(self.required_shares, input_piece_size, d = self._gather_data(self.required_shares, input_piece_size,