eXtremeDB 2.3 Transaction Logging final beta release
From: Information (info_at_mcobject.com)
Date: 06/16/04
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Date: 16 Jun 2004 17:30:05 GMT
McObject® has released version 2.3 of eXtremeDBT, its in-memory embedded
database system, to final beta testing. The principal new feature in this
release is an option to write database changes into a transaction log on
persistent media, combining the performance and efficiency benefits of an
in-memory database with the persistence of a conventional disk-based
database.
eXtremeDB provides critical data management features-including transactions,
concurrent access, and a high-level data definition language-while
maintaining a tiny footprint (as little as 50K code size) for
resource-constrained embedded systems. As an in-memory database, eXtremeDB
delivers the real-time responsiveness demanded by consumer electronics,
network infrastructure gear, industrial controllers and other intelligent
devices.
In version 2.3, McObject expands eXtremeDB's options for persistence with
transaction logging - a process in which changes made to a database (by
transactions) are recorded to a log as they occur. In the event of a
hardware or software failure, the eXtremeDB runtime can recover the database
using the log.
In keeping with its design principles, eXtremeDB 2.3 equips developers with
the flexibility they need to tune transaction logging for their
applications, including:
Configurable transaction durability. Logging may be set to different levels
of transaction durability, allowing system designers to make intelligent
trade-offs between performance and risk of unrecoverable transactions;
Deferred cleanup. After a database image is captured on persistent media (a
"checkpoint"), prior checkpoints and transaction logs are no longer needed.
Removal can be synchronized with checkpoint completion, or delegated to a
background task;
Wide-ranging control parameters. To provide the greatest developer
flexibility, McObject provides a rich array of transaction logging control
parameters, including depth of the recovery tree and maximum transaction log
file size.
Transaction logging does not alter eXtremeDB's all-in-memory architecture,
which gives a performance advantage over disk-based databases. Database read
performance is unaffected by transaction logging and, while developers have
control over the degree of the logging's impact on database writes, write
performance far exceeds traditional disk-based databases in all cases
(logging for eXtremeDB requires only a single write to persistent media
versus the many writes required by disk-based databases for data pages and
index pages modified during the transaction, plus the transaction log
itself).
Developers interested in eXtremeDB Transaction Logging can download the
documentation or browse http://www.mcobject.com/logging.shtml where they can
also follow a link to enroll as a beta tester.
McObject provides complete source code for eXtremeDB. The database runs on
popular embedded system platforms including VxWorks, QNX Neutrino, LynxOS
and other RTOSs, and virtually all other operating systems, including Linux
and Windows Embedded.
About McObject
Founded by embedded database and real-time systems experts, McObject offers
proven data management technology that makes intelligent devices smarter,
more reliable and more cost-effective to develop and maintain. McObject
counts among its customers industry leaders such as DaimlerChrysler, Tyco
Thermal Controls, Genesis Microchip, Motorola and Boeing. McObject, based in
Issaquah, WA, is committed to providing innovative technology and first rate
services to customers and partners. The company can be reached at
+1-425-831-5964, or visit www.mcobject.com.
McObject and eXtremeDB are trademarks of McObject LLC. All other company or
product names mentioned herein are trademarks or registered trademarks of
their respective owners.
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