“The process of stopping, rewinding and getting back up to speed is called repositioning or backhitching. Each reposition/backhitch can take as long as a few seconds. If you backhitch a lot, it’s called shoeshining because the tape activity mimics the movement of a cloth being used to shine shoes.” — Curtis Preston
Today’s WhatIs.com Word of the Day is shoeshining, the repeated back and forth motion a tape drive makes when there is interruption in the data stream.
“Apple’s Xserve RAID allows you to choose which is more important to you–performance or integrity. If you choose write-back cache for performance reasons, the Xserve RAID will default to write-through cache if it detects that it is running on the UPS. Switching to write-through cache assures that nothing will remain in cache in the event of complete battery loss.” — W. Curtis Preston
Today’s WhatIs.com Word of the Day is write through, a storage method in which data is written into the cache and the corresponding main memory location at the same time.
“When preparing to return to your original office, test the systems and infrastructure to ensure they are working properly; ensure there is sufficient storage capacity to handle the returning systems and data; and ensure that sufficient network bandwidth is available for the failback.” — Paul Kirvan
Today’s WhatIs.com Word of the Day is failback, restoring operations to a primary machine or facility after they have been shifted to a secondary machine or facility during failover.
“Unfortunately, many default settings on data mining and statistical software automatically create decision trees or rules sets that are preprogrammed to distribute the cases evenly. This can be a huge problem when dealing with infrequent events or otherwise unequal distributions. Another way of stating this is that the program assumes that the prior probabilities or “priors” are 50:50, or some other evenly distributed ratio.” — Colleen McCue
Today’s WhatIs.com Word of the Day is decision tree, a graph that illustrates a decision-making process by listing every possible outcome as a branch of the tree. (Usually the tree appears to be growing sideways.)
Decision trees are useful for providing team members with a common view of possible outcomes for discussion purposes — but they can also (gasp) be used to assign values to possible outcomes and actually frame what a decision’s consequences would look like.
MBABullshit has a good video illustrating how a decision tree might be used when deciding whether to sell lemonade or candy.
“Stateless computing isn’t about having no state. It’s kind of a misnomer. It’s about where that state is stored.” — Jeffrey Birnbaum
Today’s WhatIs.com Word of the Day is stateless app. A stateless app is an application that does not record data generated in one session – such as information about user settings and events that occurred — for use in the next session with that user.
“The market for a mobility architecture might not be as large as one for a hot, new smartphone, but at least it’s a new direction that might work. It’s just a question of whether RIM wants to let go of device that it has so much invested in.” — Shamus McGillicuddy
“The orchestration software that drives the service catalog understands the processes required for each service listed in the catalog, as well what resources are available in the private cloud architecture to support it. When the user selects a service from the catalog, the orchestration system takes over, launching a series of automated tasks to allocate the server, storage and networking resources for the service.” — Michael Brandenburg
Today’s WhatIs.com Word of the Day is cloud orchestrator, industry lingo for software that manages the interconnections and interactions among cloud-based and on-premises business units.
“Some observers feel Microsoft is working toward making Exchange Server backups completely unnecessary. The idea is that Database Availability Groups will eventually make Exchange resilient enough that you won’t need backups.” — Brian Posey
“There’s a lot to like about the idea of app wrapping. First of all, ensuring that encryption and authentication is present at the app level means that device level security is not nearly as important. So BYOD, managed or unmanaged devices—that all doesn’t matter. And with app wrapping, you can add security features to pre-existing apps.” — Jack Madden
Today’s WhatIs.com Word of the Day is app wrapping. App wrapping is a big deal in mobile application management (MAM) because it allows an administrator wrap a security policy around a third-party mobile app.
The WhatIs.com Word of the Day archive is like an impressionist painting about information technology. Close up, the focus seems to be on random tech terms. Take a step back and look at all the posts together — and you begin to see a clear picture of how enterprise IT is evolving.