What is Berkeley DB Not?
In contrast with most other database systems, Berkeley DB provides relatively simple data access services. Records in Berkeley DB are (key, value) pairs. Berkeley DB supports only a few logical operations on records, as follows:
Inserting a record in a table.
Deleting a record from a table.
Finding a record in a table by looking up its key.
Updating a record that has already been found.
Notice that Berkeley DB never operates on the value part of a record. Values are simply payload to be stored with keys and reliably delivered back to the application on demand.
Both keys and values can be arbitrary bit strings, either fixed-length or variable-length. As a result, programmers can put native programming language data structures ...
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