Github user maropu commented on the issue:
https://github.com/apache/incubator-hivemall/pull/51
`blosc` provides random access (of course, you can read data from the head
to the end) on compressed data though, there is no java wrapper in the
official: http://blosc.org/. As another option, you can use bitshuffle + snappy
in `snappy-java` (this is not differential coding though). But, in this case,
you need to write a bit code to compress data block-by-block by yourself. Then,
you could access the compressed data from the head block-by-block. That is, my
answer is that AFAIK there is no existing library for your case.
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