In the late-60s and 1970s, there was a computer timesharing industry that's
the closest parallel to cloud computing as an industry. At its peak there
were dozens of vendors, including IBM, GE and Computer Sciences
Corporation. It was the mainframe era when a medium size computer leased
for $15-17,000 per month and a large one sold for $3+ million.
Organizations opened timesharing accounts for the same reason they'll open
an account with a cloud computing vendor - access to computing resources on
a pay per use basis, without having to lay out millions for a computing
infrastructure. This model works quite well if you are developing
applications or services on a project or contract basis.
Organizations also used timesharing accounts for overflow situations, such
as when they needed extra capacity for year end processing, long-running
simulations, reservoir modeling or other one off requirements. That's a
class of user who'll look to cloud computing today.
Timesharing vendors initially competed on the basis of price, uptime, queue
delays and operating system. If you were writing an app that was eventually
to be hosted on a Honeywell GCOS system, you selected a service such as
GE's GEISCO. If the target was Univac, you'd like use CSC Infonet. Cloud
computing removes platform dependency and scalability (queue delays) from
the picture, but price and uptime are still competitive factors.
As the timesharing space became crowded, vendors broadened the portfolio of
software available to their customers. They offered multiple applications
and DBMSs (also billed per usage) and supported their use with training and
tech support. That's likely to be a differentiator today. Look at what
AppExchange has done for salesforce.com.
======== Ken North ===========
www.KNComputing.com
www.DataServicesWorld.com
www.CloudComputingSummit.com
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May I point out that time shared died -- extinct-- very shortly after
VAXen and other suitable departmental computing platforms became
available. Timesharing was attractive only when there was no
alternative. The question was one of control, not price -- An entry
level 780 was way beyond anyone's timesharing bill.
Why is history going to reverse itself?