Ted Dunning created MAHOUT-1236:
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Summary: Need a cleaned up serialized format for Vectors to handle
names and all other kinds of things
Key: MAHOUT-1236
URL: https://issues.apache.org/jira/browse/MAHOUT-1236
Project: Mahout
Issue Type: Bug
Reporter: Ted Dunning
Our current serialization is subject several ills
a) it breaks alignment by having a 1 byte flag field (evil, generic)
b) it doesn't handle any kind of extensible format like protobufs so it isn't
future-proof
c) it doesn't handle named vectors very well
d) it totally breaks with any other kind of decoration as with Centroids or
WeightedVector or ... (see b)
I propose that we use the current tag byte on the current serialization with a
new flag bit that indicates that the vector will use a protobuf encoding. Then
3 bytes will be skipped to restore alignment. Then there will be a protobuf
encoding for the vector.
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