We present a model of CMS Partial Releases, used for preparation of the customized CMS software builds, including description of the tools used, the implementation, and how we deal with technical challenges, such as resolving dependencies and meeting special requirements for concrete applications in a highly automated fashion. Physics analysis applications in Root environment require only a few core libraries and the description of CMS specific data formats. GPG 0x324543E5 4 Checking out CMSSW Source the general CMS environment source /vols/cms/grid/setup.sh List the available versions scram list CMSSW Check out version 3.8.7 scram project CMSSW CMSSW387 A CMSSW area can grow quite large (100sMB), do this somewhere with sufficient space. For example, High Level Trigger algorithms that run on the Online farm, and need to be rebuilt in a special way, require no simulation, event display, or analysis packages. For several well-defined applications it is highly desirable to have only a subset of the CMSSW full package bundle. Packaging in rpm format is a built-in step in the software build process. S3 storage improved performance in garbage collection. Bottlenecks in publish were not due to CernVM-FS performance. ![]() It is a highly reliable service that CMS uses extensively. It allows processes to be running on the same kernel as system processes, yet it uses separate runtime (include basic things like libc). It helps in development, distribution and preservation of software. Foreword about Docker and CMSSW Docker is a an OpenSource framework for developing, distributing and deploying so called Containers, middle ground between virtual machines and process. The release integration process is highly automated by using tools developed or adopted by CMS. CernVM-FS and containers technologies are crucial for CMSSW. The CMS Software project CMSSW embraces more than a thousand packages organized in subsystems for analysis, event display, reconstruction, simulation, detector description, data formats, framework, utilities and tools. Jones, Christopher D (Karlsruhe U., EKP) Lange, David (Karlsruhe U., EKP) Meschi, Emilio (Karlsruhe U., EKP) Shahzad Muzaffar (Karlsruhe U., EKP) Andreas Pfeiffer (Karlsruhe U., EKP) Ratnikova, Natalia (Karlsruhe U., EKP) Sexton-Kennedy, Elizabeth (Karlsruhe U., EKP)ฤก7th International Conference on Computing in High Energy and Nuclear Physics, Prague, Czech Republic, 21. CMS Partial Releases : Model, Tools, and Applications.
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