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authorzuntum <zuntum>2001-11-01 00:11:36 +0000
committerzuntum <zuntum>2001-11-01 00:11:36 +0000
commit8bc5dafa3b85eac1ad1a0c6f37cd23466c28a12c (patch)
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parent6bab4329d1bdf3ff52eeba382e147cfe3a215bf2 (diff)
downloadpkgsrc-8bc5dafa3b85eac1ad1a0c6f37cd23466c28a12c.tar.gz
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+Berkeley DB is an embeddable database system that supports keyed access to
+data. The software is distributed in source code form, and developers can
+compile and link the source code into a single library for inclusion
+directly in their applications.
+
+Developers may choose to store data in any of several different storage
+structures to satisfy the requirements of a particular application. In
+database terminology, these storage structures and the code that operates on
+them are called access methods. The library includes support for the
+following access methods:
+
+ * B+tree: Stores keys in sorted order, using either a programmer-supplied
+ ordering function or a default function that does lexicographical
+ ordering of keys. Applications may perform equality or range searches.
+ * Hashing: Stores records in a hash table for fast searches based on
+ strict equality. Extended Linear Hashing modifies the hash function
+ used by the table as new records are inserted, in order to keep buckets
+ underfull in the steady state.
+ * Fixed and Variable-Length Records: Stores fixed- or variable-length
+ records in sequential order. Record numbers may be immutable or
+ mutable, i.e., permitting new records to be inserted between existing
+ records or requiring that new records be added only at the end of the
+ database.