The Versant Fault Tolerant Server (FTS) is an add-on software module for the Versant Object Database enabling automatic fail-over and recovery in the case of hardware or software failure.
FTS uses synchronous replication between two database instances and supports transparent re-synchronization in the event of a failure. Synchronous database replication mirrors the contents of one database to another in a predictable and orderly manner. This provides either local or geographically remote redundancy, which protects against the unavailability of data. Besides sychronous database replication, you can also protect yourself against system failure with asynchronous database replication.
With FTS' synchronous replication, two databases, the "replica pair", are kept in sync transactionally using parallel operations in a distributed two phase commit protocol. If a crash occurs to the database, Versant continues working by using the replica database. Once the crashed database becomes available again, Versant automatically resyncronizes the crashed database during operation and returns to fully replicated operation.
Versant's FTS is driven through configuration by the application process to support in-flight transaction recovery on failure. This approach offer a distinct advantage over the log based replication commonly found in database products.
Please use the Purchase Inquiry Form to receive individual information on runtime pricing and licensing.
Be sure to visit the Versant Developer Center! Versant provides a variety of technical resources to help you getting into object-oriented data management and to support you become productive using the Versant Object Database:
Technical Questions:
Message Boards
Purchase Inquiries:
Versant Object Database
FastObjects .NET
General Questions:
Quick Message Form
For postal adresses, phone numbers, e-mail addresses, driving directions etc please refer to:
Get a free 60-day Evaluation copy and testdrive the Versant Object Database or FastObjects .NET! Downloads are available within the Versant Developer Center:
Versant Vorkout lets you reclaim unused space in your database while it is in normal operation, increasing free space and improving performance.
In today's fast paced world you want to be part of a company that is on the leading edge of technology? Join Versant!
The Versant Developer Center (VDC) provides all the essential information and valuable resources needed for developers, just like
OEM Partner Program: Versant offers independent software vendors and
value-added resellers an OEM Jump Start Package for free!
www.versant.com | Copyright © 2003-2008 Versant Corp. All rights reserved.
For questions about this site please contact webmaster@versant.com
Versant, Vitness, Vorkout and FastObjects are either a registered trademark or trademark of Versant Corporation in the United States and/or other countries. All other products might be a registered trademark or trademark of their respective company in the United States and/or other countries.