Since UNIX systems were developed back in the 1970’s, things as you’d
expect have moved on a long way. Single
CPU systems, the size of washing machines, have been replaced with many racks
of multi-core (hyper-threaded) blade servers.
In more recent years, the re-introduction of virtualization allowed for
multiple virtual systems to be hosted on a single piece of hardware via a
hypervisor. Modern data centers will
typically host many thousands of both physical and virtual servers.
Physical and
Virtual hosts
–
Web Servers
–
Database hosts
The mix of physical and virtual tends to depend
on what applications are being hosted. It
is likely that physical servers will be hosting large RDBMS instances and
virtual servers hosting web applications. On Friday I'll be taking a look at licensing concerns.
Jamie Baker
Principal Consultant
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