P5EE - Platforms
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The following computing platforms are defined.
They are not all Enterprise Platforms.
However, they are all platforms which P5EE software should run on.
This is because P5EE software will often be developed,
demonstrated, evaluated, or even operated initially on these platforms.
The software may be upgraded to an Enterprise Platform at any time.
This will be one of the major advantages of the P5EE Software
Architecture: its support for a variety of Platforms.
- CGI only, Single System (unprivileged) - a typical ISP/web-hosting arrangement.
- CGI, Single System (unprivileged) - a typical way that a corporate user
or university student can set up the platform without getting system administrators
involved. This differs from the "CGI only" because the user also has the privilege
to run daemons and schedule jobs.
- Single User mod_perl, Single System (unprivileged) - a typical way a developer
will do development
- mod_perl, Single System (unprivileged) - like the "CGI, Single System (unprivileged)"
system but higher performance and more resource-intensive
- mod_perl, Single System (privileged) - a simple, entry-level production platform.
This has only a single, mod_perl-enabled Apache server to handle static and dynamic requests.
- Mirrored (unprivileged) - the closest thing to a highly-available system
that can be set up by non-privileged users. Data is replicated in near-real time between
a collection of machines, and any of the participating mirrors may be used to access
the same applications and data. Each of the mirrors may choose to be implemented
as one of the other platforms. This also supports the detachment of mirrored systems
from the network (i.e. laptops) and later reattachment and synchronization.
- Dual Redundant System - entry-level Enterprise platform, offering simple failover
from the primary to the backup secondary system (no load-balancing)
- Single Site Cluster - typical Enterprise platform, offering virtually unlimited
scalability through load-balancing and redundancy of every computing resource
- Multi-Site Cluster - global Enterprise platform, offering everything a
Single-Site Cluster offers in terms of scalability, but with the added advantage
that multiple sites dispersed geographically may handle regional load and
guard against major regional catastrophes like earthquake, nuclear attack, etc.