de253d21__HBase_vs__BigTable_Comparison__Feature
[Google BigTable] 10-1000 [Apache HBase] 10-1000 [Notes] Both systems recommend about the same amount of regions per region server. Of course this depends on many things but given a similar setup as far as "commodity" machines are concerned it seems to result in the same amount of load on each server. [Feature] 
Tablet/Region Count
Lineland: HBase vs. BigTable Comparison
Feature