I have never used HBase and I've only used Accumulo with less than 100 tables. However, when I see a statement like the following about HBase, I feel compelled to ask how it compares to Accumulo. Does anyone know?
http://phoenix.incubator.apache.org/views.html: This is especially important in HBase, as you cannot realistically expect to have more than perhaps up to a hundred physical tables and continue to get reasonable performance from HBase.
