Following on from FoundationDB's graph store, they are now proposing a document store. Again, there is emphasis on 'ACID' compliance. So, unlike most other newcomers to the database scene, their database will support the protections familar to RDBMS database administrators. The database should be protected from interference and corruption, and benefit from protection of saved transactions.
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Linux Journal has published a simple to understand introduction to MapReduce using Hadoop. Definitely worth a read if you need an introduction.
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.
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]