lockstep processor techniqueA processor lockstep is a technique used to achieve high reliability in a microprocessor system. This is done by adding a second identical processor to a system that monitors and verifies the operation of the system processor.
* The two processors are initialized to the same state during system start-up, and they receive the same inputs (code, bus operations and asynchronous events), so during normal operation the state of the two processors is identical from clock to clock. They are said to be operating in lockstep. The lockstep technique assumes that an error in either processor will cause a difference between the states of the two processors, which will eventually be manifested as a difference in the outputs, so the lockstep system monitors the outputs of the two processors and flags an error in the case of a discrepancy. [* Adapted from IBM PowerPC Tips]
From the widest view, everything that we include under the heading of mobile has irrevocably changed IT's relationship with the rest of the... Read More »Choosing an Enterprise Storage Implementation
When you deploy a new enterprise storage system, you must decide whether to design and build your own storage system or to utilize a cloud-based... Read More »Big Data Analytics Expert Predictions
In this Webopedia Did You Know...? article we look at three big data expert predictions for 2014. Read More »
Keeping track of big data trends, research and statistics gives IT professionals a solid foundation to plan big data projects. Here are 15... Read More »Enterprise Storage Vendors
There's a number of vendors that sell enterprise storage hardware or offer cloud-based enterprise storage. View Webopedia's Enterprise storage... Read More »50 Cloud Computing Terms Defined
From planning a private cloud project to finding an online cloud storage provider, Webopedia's A-Z Cloud Computing Glossary will help you... Read More »
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
- Enterprise Mobility Exchange results show continued growth and emphasis on mobility. CIOInsight breaks down the numbers here. »
- Watch Datamation's editor James Maguire moderate roundtable discussions with tech experts from companies such as Accenture, Dell, Blue Jeans Network, Microsoft and more »