Can I implement a Key-Value Store with VoltDB?
It is not only possible to implement a Key-Value Store in VoltDB, there are several advantages to using VoltDB for this purpose. By creating a table with two columns (an INTEGER or CHAR[] key field and a VARCHAR[] value field) and partitioning on the key field, it is possible to create an unstructured key/value data store using VoltDB. The advantages to doing this are that VoltDB provides all of the ACID attributes (including atomicity, consistency, and durability) while automating the partitioning of the data. VoltDB can also outperform many disk-based KV stores. There is one limitation to using VoltDB as a KV store: you must identify a maximum length when defining the value field in the database schema. As a consequence, KV values cannot be arbitrarily long. The current maximum size for a VARCHAR field is one megabyte in length.
