1 / 14

Thinking about Accounting

Open Science Grid. Thinking about Accounting. Matteo Melani SLAC 08-13-2004. What is Accounting? (in the Grid context). Grid accounting is the process of maintaining a (consistent) Grid-wide view of VO members' resource utilization.[1]

argyle
Télécharger la présentation

Thinking about Accounting

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Open Science Grid Thinking about Accounting Matteo Melani SLAC 08-13-2004

  2. What is Accounting? (in the Grid context) Grid accounting is the process of maintaining a (consistent) Grid-wide view of VO members' resource utilization.[1] [1] Accounting in Grid Environments, by Peter Gardfjäll, Department of Computing Science, Umeå University ,Sweden Open Science Grid

  3. Why do we want an accounting system? • Resource providers (SLAC, Fermilab…) want to perform cost-benefits analysis • Resource providers wants to improve planning • Resource providers want better security • Resource providers want to improve QoS (priorities, debugging…) • Support a Grid “Economic Model” Open Science Grid

  4. What is the real problem (solution)? • Nobody talked about “Grid economy” • Do we really want an Accounting system? • Or maybe a monitoring system will do? Lets look at accounting and monitoring Open Science Grid

  5. Accounting vs. Monitoring (1) A monitoring system: • Purpose: monitoring system health, debugging, system profiling • Gathers state information about the system resources • Collects system events. • It works like a DAQ system: as close as possible to the system, as less intrusive as possible Open Science Grid

  6. Accounting vs. Monitoring (2) An accounting system: • Purpose: keep track of resource usage, support resource consumption model (economic model) • Accounting makes sense of the systems events and links them to the users. • It operates at a higher level, (it depends on monitoring) • It has accounts, banks, “currency” and support an economic model (policies) Open Science Grid

  7. For Example: Monitoring at SLAC (1) What do we monitor: • Network • Switches, routers status Internet Mbytes/sec in/out • Computer Clusters • Batch systems, NFS and AFS servers, databases servers • Storage Space • Disks usage, HPPS Open Science Grid

  8. For Example: Monitoring at SLAC (2) Some metrics we use: • CPU utilization, Memory • Disk usage, Disk I/O • Various Networking metrics (Mbytes in/out of switches, routers, servers…) • Some primitive job submission results (LSF) All monitoring tools are custom made except Ganglia for Babar clusters Open Science Grid

  9. For Example: Accounting at SLAC? • The monitoring system cannot link resource usage to users/groups • Maybe by looking into the logs and correlating the events…but a lot of work No Accounting at SLAC Open Science Grid

  10. The 3 parts of Accounting • Part 1: decide what need to be accounted for • Part 2: how to map local accounts with Grid accounts • Part 3: rules and policies to regulate transactions and definition of the economic model: “how much is for couple of GBytes of disk?” I can only think about part 1 for now! Open Science Grid

  11. What I think we should track(in general) • Job submission: • Priority in the batch queue • CPU-time • Wall clock time • Memory usage • Storage • Disk usage, • Tape storage usage • Storage class (to be defined) • Network data transfer • Network speed • Quantity of data transferred • Special software usage, Operator/Administrator services…maybe later Open Science Grid

  12. What _we_ think we should trackfor the storage service Assuming Storage Service has Filename owner VO size <creation time> Snapshot every t minutes t owner VO GB/days Roll up every n (30?) days n VO GB/day <storage class> Open Science Grid

  13. What’s next? • Read more • Work at some use cases • Add “meat” to the Accounting requirements document • Talk to people and get some help! Open Science Grid

  14. References • Distributed Accounting on the Grid, William Thigpen (NASA IPG), Thomas J. Hacker (University of Michigan), Laura F. McGinnis (Pittsburgh Supercomputer Center) , Brian D. Athey (University of Michigan). • GridBank: A Grid Accounting Services Architecture (GASA) for Distributed Systems Sharing and Integration, Alexander Barmouta (University of Western Australia) ,Rajkumar Buyya (University of Melbourne) • An Economy-based Accounting Infrastructure for the DataGrid, Albert Werbrouck (INFN of Turin), Rosario Piro (INFN of Turin), Andrea Guarise (INFN of Turin). • An OGSA-Based Accounting System for Allocation Enforcement across HPC Centers, Erik Elmroth and Peter Gardfjäll, Umeå University, Sweden Open Science Grid

More Related