Refactor dense matrix storage
-----------------------------
Key: HAMA-125
URL: https://issues.apache.org/jira/browse/HAMA-125
Project: Hama
Issue Type: Improvement
Components: implementation
Affects Versions: 0.1.0
Reporter: Edward J. Yoon
Fix For: 0.1.0
Current entry is too small, have a lot of column keys. So, it cause too many
requests over hbase.
Current table schema:
column:
=============================
rowKey1 column:0 <0.323..>
column:1 <0.413..>
... N
rowKey2
...
We can group the columns as describe below. (2D array is too complex.)
vector:
=============================
rowKey1 vector:0 <0 ~ 9999999>
vector:1 <10000000 ~ 19999999>
...
rowKey2
...
----
Should be changed things :
- DenseMatrix : get/set(), get/setRow(), get/setColumn() ..
- DenseVector : get/set(), subVector(), ...
...
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