A well-known problem with NoSQL databases in general is that they do not support the 'ACID' principals held dear by traditional RDBMS DBAs. The Register is reporting that this may soon change with FoundationDB. Atomicity ensures that a transaction is saved or undone, but never exists halfway between the two states. Consistency ensures that only valid data can be stored. Isolation of transactions prevents one transaction interfering with another.
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I used to be an Oracle DBA ... but now I'm a Big Data guru - Dominic Connor shows you how to jump the bandwagon As the demand for Oracle skills fades along with VB and as even Java loses its shine, the smart developer is looking at what will pay the bills for the next decade.… [The Register]
You may have a small RAC database that is managed with the dbconsole rather than the grid. The documentation states that the console must be started manually on the applicable cluster node(s) whenever it is required. Couldn't the CRS cluster start and stop the dbconsole automatically?
Oracle Database 11g Release 2 has a new feature named server pools. If a database is created as a policy managed RAC database then policy will dictate where the database instances are placed in the cluster rather than which instances were created on which node at creation time.
Take a cluster of three nodes.