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Grid and Cloud Computing. Alessandro Usai SWITCH alessandro.usai@switch.ch Sergio Maffioletti Grid Computing Competence Centre - UZH/GC3 sergio.maffioletti@gc3.uzh.ch. Content. Motivations Overview of a Grid Job (in a nutshell) Cloud computing: Amazon Web Services Grid Job revised
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Grid and Cloud Computing Alessandro Usai SWITCH alessandro.usai@switch.ch Sergio Maffioletti Grid Computing Competence Centre - UZH/GC3 sergio.maffioletti@gc3.uzh.ch
Content • Motivations • Overview of a Grid Job (in a nutshell) • Cloud computing: Amazon Web Services • Grid Job revised • Project Plan • Conclusions
Motivations: Main idea: dynamic allocation of resources! • Grid is presented to end users as a large abstract computing and storage farm with virtually infinite resources • Simple user interfaces are provided for specific usage of the grid infrastructure • Resources are allocated upon user’s requests • Users could be charged based on the effective usage of grid resources • Applying scenarios: • At peak time we may use extra cpu time/storage as Virtual Machines obtained from a Cloud. • Virtual Machines from a Cloud could also be used for jobs with particular characteristics e.g. jobs very demanding in cpu/storage. Clouds can be local or remote. Virtual Machines also offer advantages in terms of Management/Deployment.
Overview of a Grid Job (in a nutshell) X509 proxy + user job • User code + proxies/auth info + resources specs -> broker/match making -> chosen site gateway -> extra code bit added and submitted to the batch system (typically grid oblivious) -> jobs run on Worker Nodes. • The batch system reports the info to the grid middleware which further propagates it; various checkpoints actions kick in to safeguard the output back to the user. • Virtual Machines are needed here but: the User Interface, info system, gateway, batch system as well as Worker Nodes might already be all VMs. Batch System Information System
Cloud computing: Amazon Web Services (AWS) You register and you get access to the “clouds” I.e. US and/or EU zones XEN Virtual Machines Storage (s3) NAT X509 or RSA XEN Virtual Machines Storage (s3) Account: Username and password Web Services Interface
Grid Job revised Batch System X509 proxy + user job Information System The Batch System needs to be able to advertise the Cloud in a dynamic way, start up/stop the virtual machines, Submit/manage jobs, ….Some solutions are available (e.g. OpenNebula) but there is still work to be done.
Project Plan First part: • Assessment of existing solutions: this step also includes the definition of the use case requirements • Development of the missing functionalities at the Batch System level Second part: • Assessment of the authentication/authorization/accounting requirements • Development/integration of the necessary AAI functionalities • Implementation of a billing system
Conclusions • Cloud computing and dynamic resource allocation: fills in the hole for a use case not supported by traditional grid computing -> more interaction with cloud computing needed: challenging from the authentication, authorization and accounting point of view. • Switch and the University of Zurich have expressed interest in submitting the project proposal by March 2010. Any other partners interested?
