Build a PaaS using Open Source Software

Discussion about OpenShift.  OpenShift has been fully open-sourced, available on GitHub for local deployment, or directly usable as a hosted solution. Rule #1: IaaS != PaaS Virtual machines : Application is not necessarily 1:1 Rule #2: PaaS is not a silver … Continue reading

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Application High Availability in Virtual Environments

http://www.redhat.com/summit/sessions/index.html#394 Great discussion around Red Hat’s solutions for clustering, fencing, etc, in virtualized environments. Fencing is /very/ important for shared resources, especially disk.  In a virtualized world (RHEV, VMWare, etc), fencing tools can reach right into the hypervisor to kill … Continue reading

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Distributed File System Choices: Red Hat Storage, GFS2, & pNFS

Red Hat has several options for storage needs — GFS2, CIFS, (p)NFS, Gluster.  It’s all about right tool for the job. http://www.redhat.com/summit/sessions/index.html#103 RHEL Resilient Storage – GFS2 Shared storage, scales up to 100TB per instance, supports 2-16 nodes in the … Continue reading

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