Sampling HBase table keyspace

Question

I'd like to build random samples of a HBase table's rowkey space.

Say, I'd like to have roughly 1% of the keys from HBase that are randomly distributed across the table. What's the best way of doing this?

I suppose I could write a MapReduce job that processed all the data and pulled 1/100 of the keys... or perhaps use a coprocessor.

Answer 1

You can use the RandomRowFilter to get the sample.