Cloudera recently launched CDH 6.2 which includes two new key features in Apache HBase:
- Serial replication
- Bucket cache now supports Intel’s Optane memory
HBase has a sophisticated asynchronous replication mechanism that supports complex topologies today that include global round-robin, two way, span-in and span-out topologies.
This replication capability, to date, provides eventual consistency — meaning that the order in which updates are replicated is not necessarily the same as the order in which they were applied to the database.