2010 | OriginalPaper | Buchkapitel
Concurrency and Multi-versioning
Erschienen in: Expert Oracle Database Architecture
Verlag: Apress
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As stated in the last chapter, one of the key challenges in developing multiuser, database-driven applications is to maximize concurrent access but, at the same time, ensure that each user is able to read and modify the data in a consistent fashion. In this chapter, we’re going to take a detailed look at how Oracle achieves
multi-version read consistency
and what that means to you, the developer. I will also introduce a new term,
write consistency
, and use it to describe how Oracle works not only in a read environment with read consistency, but also in a mixed read and write environment.