Sitaraman,
Check out the ColumnVisibility[1] class. Some effort is taken to ensure
that ColumnVisibilities are normalized yet logically-equivalent.
As far as compression goes, this would be handled at the file level
(compress a sorted collection of Keys) instead of a the ColumnVisibility
level. Check out RelativeKey [2] for some of that logic.
- Josh
[1]
https://github.com/apache/accumulo/blob/1.5.0/core/src/main/java/org/apache/accumulo/core/security/ColumnVisibility.java
[2]
https://github.com/apache/accumulo/blob/1.5.0/core/src/main/java/org/apache/accumulo/core/file/rfile/RelativeKey.java
On 2/17/14, 7:30 PM, Sitaraman Vilayannur wrote:
Hi,
How are the column visibility elements stored in Accumulo. Is there a
kind of compression that is used to save space or are all the elements for
each key value paired stored as is.
A pointer to the region of the code that i should look at for the
implementation will also be helpful.
Thanks
Sitaraman
