Eventually Consistent: The fact that BASE does not obligates immediate consistency but it does not mean that it never achieves it. The BASE model breaks off with the concept of a database that obligates its own consistency, delegating that responsibility to developers. Soft State: Due to the lack of immediate consistency, the data values may change over time. Basically Available: Instead of making it compulsory for immediate consistency, BASE-modelled NoSQL databases will ensure the availability of data by spreading and replicating it across the nodes of the database cluster. The acronym BASE is slightly more confusing than ACID but however, the words behind it suggest ways in which the BASE model is different and acronym BASE stands for:. The rise in popularity of NoSQL databases provided a flexible and fluidity with ease to manipulate data and as a result, a new database model was designed, reflecting these properties. Some NoSQL DBMSs, such as Apache’s Couch DB or IBM’s Db2, also possess a certain degree of ACID compliance(There are no recommendations of No SQL database if the requirement is of strict ACID rules). 
The databases that are ACID compliant are the one safe way to make sure your database is ACID compliant is to choose a relational database management system like MySQL, PostgreSQL, Oracle, SQLite, and Microsoft SQL Server. Durability: The database should be durable enough to hold all its latest updates even if the system fails or restarts so, In a practical way of saying that if a transaction updates a chunk of data in a database and commit is performed then the database will hold the modified data but if the commit is not performed then no data is modified and it can only be done when the system start.Isolation: In a database system where more than one transaction is being executed simultaneously and in parallel, the property of isolation states that each one of the transactions is going to be administered and executed as it is the only transaction in the system also no transaction will affect the existence of any other transactions.Consistency: The database must remain in a consistent state after any transaction also no transaction should have any adverse effect on the data residing in the database and if the database was in a consistent state before the execution of a transaction then it must remain consistent after the execution of the transaction as well.Atomicity: This property states transaction must be treated as an atomic unit, that is, either all of its operations are executed or none, and there must be no state in a database where a transaction is left partially completed also the states should be defined either before the execution of the transaction or after the execution of the transaction.Advantages and Disadvantages of Star Topology.
ACID DATABASE SOFTWARE
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