Hi,

I'm evaluating Kudu and I'd need some hints about column encoding and 
compression.


A- Does it make sense adding LZ4 compression to a field with Dictionary 
Encoding ?
B- Does it make sense adding LZ4 compression to a field with Run-Length 
Encoding ?

C- I have a non-key column with randomly distributed INT32 numbers, I guess I 
won't add an encoding. But what about compression ? Would LZ4 make sense ? 
Would it slow down aggregations (`SUM`) ?




Thank.
Nicolas



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