1 / 9

Technology Themes Over Time

Technology Themes Over Time. CPIS 210 ch01. Moore’s Law. Original: The amount of memory available on a chip (which tends to be constant cost) doubles about every 18 months Now: We tend to assume this applies to every performance-related number in IT

arva
Télécharger la présentation

Technology Themes Over Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Technology Themes Over Time CPIS 210 ch01

  2. Moore’s Law • Original: The amount of memory available on a chip (which tends to be constant cost) doubles about every 18 months • Now: We tend to assume this applies to every performance-related number in IT • Reality: Some numbers are very hard to increase • So we find another way to do that function that is inherently faster

  3. Serial vs Parallel • Early belief: Parallel is inherently faster than serial • Current practice: Go serial, but go fast • Progression: • Parallel to maximize low-speed lines • Faster serial line • Fiber • See this in networking, disc drives, video

  4. How Purposes Change • Highest-priority purposes dominate when costs are high • 1940s: Ballistics table for new weapon • New uses appear when costs moderate • 1960s: Payroll • Radical re-purposing as costs become trivial • Blinking lights sold at Dollar Tree

  5. Standardization • Old approach: Everything is part of “our” product line • Medium approach: “Our” product is core, but to do x you’ll need this additional device from another vendor: • Emerging approach: Multi-vendor environment ruled by standards • What about your entity directory? • Issue: Do you have multiple vendors within a given box? • Issue: “We go beyond the standard to get better [performance][features].”

  6. Energy • Mainframe supplied by carefully-conditioned power w/backup • Distributed system – using local UPSs as needed • Extremely low-power devices: batteries, solar • What happens to your data when power fails? • How does the system function when power is out • How do you return to normal operation after power is restored?

  7. Configuration Methods • Manual / hardware • Jumpers and switches • Manual / software • Early: Connect VT100 terminal • Current: Device contains a mini Web server • Automatic (self-discovery) • Easier to set up in most cases • If using a program, must run on workstation • Problems resulting from design errors or glitches can to be very difficult to solve • Nice to have a manual config option

  8. Configuration Memory • CMOS • FLASH • Hard drive • Backup/Restore? • A major issue for CSAs: Where is the data physically kept?

  9. Why Use IT? Business Models • Computers give us more efficiency • Calculating FICA in payroll • Controlling inventory at big-box stores • Computers allow us to be more flexible • Handling new compensation formulae for sales people • Computers enable new business models • RedBox

More Related