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32
Platform as a Service For Dummies, Special Edition
Development-to-test-to-production
coordination services
The PaaS provider can provide services that enable updates
of cloud applications without interrupting services. For example,
in your own data center, you may roll out the new version
of the software to one segment of users at a time. With PaaS,
you can make sure that the flow between development, testing,
and deployment is more seamless. PaaS helps you guarantee
no loss of uptime.
While these concerns cross more into deployment, they also
impact development. For example, a Java web application may
make use of a session store to ensure the state is maintained
in the event of failure and across updates. The PaaS provider
can help by providing a session store capability built-in and by
automatically coordinating the update rollout process. So, the
developer can make use of the session store directly and also
test to make sure it always works properly during the development
lifecycle. As the application is updated, the developer can
also ensure that application-level changes work across versions
that use the same session store.