Michel Dagenais

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While OSCAR (Open Source Cluster Application Resource) has been conceived for clusters with disks since its very first version, diskless and systemless support was a feature that a lot of people expected. The Center for Scientific Computing has built several clusters without disks; we tested OSCAR and were easily convinced of its quality, especially when compared to our own homemade scripts. We decided to use OSCAR for our diskless cluster and then transfer our diskless expertise to the OSCAR project. The thin-OSCAR workgroup was created specifically to analyze and solve problems that arise while adding this diskless cluster support. This article first defines essential notions for a diskless cluster. The actual implementation of thin-OSCAR is explored, along with a roadmap for the development of thin-OSCAR. Interactions with OSCAR are detailed so that features can... (more)