Just days after Citrix’s stunning decision to open-source its IaaS product CloudStack to the Apache Software Foundation, and turn away from OpenStack as the core technology for its platform, PaaS vendor AppFog declared compatibility with CloudStack. According to AppFog’s press release, “AppFog completed a rigorous verification process to ensure compatibility with Citrix CloudStack™, providing confidence in joint solution compatibility.” The announcement enables CloudStack customers to additionally deploy PaaS AppFog on top of CloudStack’s IaaS platform and thereby increase the diversity of cloud deployments in relation to varying business needs. AppFog’s declaration of compatibility with CloudStack illustrates an increasing trend in the PaaS space marked by the utilization of IaaS platforms for PaaS offerings. The availability of Red Hat’s OpenShift on Amazon Web Services constitutes another case of the co-implication of PaaS and IaaS as does ActiveState’s recent deal to resell its “any language, any cloud, any stack” Stackato product on CloudSigma’s IaaS platform.
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