Berkeley DB - download pdf or read online

By SLEEPYCAT Sleepycat Software

ISBN-10: 0735710643

ISBN-13: 9780735710641

This is often the professional info at the Berkeley DB, written by way of the creators. It exhibits tips to upload and enforce this database process into current structures with out logging on for guideline.

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Berkeley DB Data Store The Berkeley DB Data Store product is an embeddable, high-performance data store. It supports multiple concurrent threads of control to read information managed by Berkeley DB. When updates are required, only a single process may be using the database. That process may be multithreaded, but only one thread of control should be allowed to update the database at any time. The Berkeley DB Data Store does no locking, so it provides no guarantees of correct behavior if more than one thread of control is updating the database at a time.

For example, we might not want to store the key/data pair fruit/apple if it already existed; for example, if someone previously stored the key/data pair fruit/cherry into the database. data); else { dbp err(dbp, ret, "DB goto err; put"); } This flag causes the underlying database functions to not overwrite any previously existing key/data pair. (Note that the value of the previously existing data doesn't matter in this case. ) Specifying DB_NOOVERWRITE opens up the possibility of a new Berkeley DB return value from the DB put function DB_KEYEXIST, which means it could not add the key/data pair to the database because the key already existed in the database.

Fourth, when using the Berkeley DB Transactional Data Store product, the page size may affect the errors from which your database can recover. See "Berkeley DB Recoverability" for more information. Team-Fly Top 54 Part I: Reference Guide Part I: Reference Guide 55 Team-Fly Berkeley DB By Sleepycat&"v1">Table of Contents Chapter 3. Access Method Configuration Selecting a Cache Size The size of the cache used for the underlying database can be specified by calling the DB set_cachesize function. Choosing a cache size is, unfortunately, an art.

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Berkeley DB by SLEEPYCAT Sleepycat Software

by Thomas

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