Disclaimer: IBM i is an operating system. iSeries and AS400 are servers. I use them interchangeably so folks can easily find fun stuff like this on the web.
R2D2? That little dome-headed “droid” that always kept the Star Wars heroes one step ahead of big trouble? Well, not exactly. The one we’re talking about doesn’t roll around, nor does he chirp. But unlike the movie version, ours is real. He lives inside your iSeries/AS400 and he spends his life keeping you out of trouble…with never so much as a thank you from his owner.
It’s time he got a little respect, because he works day and night—not only “off the books” but entirely off your payroll. Nevertheless, he’s the best SysAdmin you ever had. For most iSeries/AS400 owners he’s the only SysAdmin in the company.
Once we explain how the iSeries/AS400 “manages” itself and how it detects and corrects intermittent errors, you’ll forgive us for the R2D2 imagery. When you stand close to the computer you might even swear you hear chirping coming from inside.
Self-Management
The IBM iSeries/AS400 has a self-management feature that is unique in all the world. During normal operations, it automatically balances its workload to optimize its performance. It accomplishes this by paying close attention to how often it needs to use each file and program. The ones it uses most often are stored close to its main processor for rapid access (cache memory, disk load balancing, etc.). The resources it uses less often are stored further away. On an ongoing basis, it cleans out and reorganizes its SQL database to keep it current and running smoothly. This self-management does more than help prevent trouble from developing. It also translates into higher overall system performance.
In contrast, all other systems and networks require a systems or network administrator—a live one, on the payroll, who chirps not at all (though he might whine a bit). This human SysAdmin has the job of performing all the “housekeeping” routines needed to keep those systems running smoothly. Who do you think is the more reliable and faster-working SysAdmin, the human-on-the-payroll, or the unsung little droid inside your “box”? But even if you ignore the reliability and speed advantages of the iSeries/AS400 self-management, you should not ignore the money you save. Many of our clients tell us that the self-management feature alone saves them the cost of one or more systems or network administrators—at $45,000–$110,000 each.
Detection/Correction of Intermittent Errors
Did you know that the iSeries/AS400 integrates unique IBM data integrity features to avoid most intermittent errors and data corruption experienced by other computers? These features monitor data as it moves about the system and within key components. For example, a unique IBM feature is “Chip Kill,” which swings into action whenever the iSeries/AS400 detects that a segment of its memory is going bad. It turns off the bad portion and turns on extra memory that is held in reserve for just such a contingency. The IBM iSeries/AS400 has a similar capability for disk drives as well.
All systems develop imperfections if they run long enough. This is as true of biological systems, such as your own body, as it is of any computer. Nature’s way of coping with such inevitable imperfections is a formidable built-in error detection/correction system that we think of as the self-healing capabilities of the living organism. Scar tissue, for example, is the body’s method of closing down and working around “bad cells.” The iSeries/AS400 design mimics this in order to avoid the potentially serious consequences of data corruption. In retrospect, this may seem like an obvious way to design a computer, but the users of other computers do not enjoy this level of protection. You may recall when eBay (powered by Sun) was down for about 4-8 hours. Forbes magazine documented this Sun cache memory failure incident, a situation according to Forbes that Sun executives knew could happen. Nevertheless, Sun’s policy was to replace a faulty cache memory only upon customer insistence—generally after a failure had already occurred.
When was the last time someone told you your iSeries/AS400 data was corrupted? In stark contrast, when was the last time you discovered that your Intel-based system data was corrupted?
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