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An Overview of the Gridway Metascheduler

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An Overview of the Gridway Metascheduler An Overview of the GridWay Metascheduler <EVENT>Congreso <City>,Cuidad <Country>, Spain GridWay <Month>May <day>, 15, 2007 <year> <GridWay Team Member> Distributed Systems Architecture Group Universidad Complutense de Madrid 1/29 Contents GridWay 1. What is GridWay? 2. A Global Vision 3. Scheduling Policies 4. Scheduling Infrastructures 5. The GridWay Project DSA Group 2/29 What is GridWay? GridWay GridWay is a Globus Toolkit component for meta-scheduling, creating a scheduler virtualization layer on top of Globus services (GRAM, MDS & GridFTP) • For project and infrastructure directors • GridWay is an open-source community project, adhering to Globus philosophy and guidelines for collaborative development. • For system integrators • GridWay is highly modular, allowing adaptation to different grid infrastructures, and supports several OGF standards. • For system managers • GridWay gives a scheduling framework similar to that found on local LRM systems, supporting resource accounting and the definition of state-of-the-art scheduling policies. • For application developers • GridWay implements the OGF standard DRMAA API (C and JAVA bindings), assuring compatibility of applications with LRM systems that implement the standard, such as SGE, Condor, Torque,... • For end users • GridWay provides a LRM-like CLI for submitting, monitoring, synchronizing and controlling jobs, that could be described using the OGF standard JSDL. DSA Group 3/29 Contents GridWay 1. What is GridWay? 2. A Global Vision 3. Scheduling Policies 4. Scheduling Infrastructures 5. The GridWay Project DSA Group 4/29 A Global Vision GridWay Global Architecture of a Computational Grid DRMAA s Results n o i $> t • Standard API (OGF DRMAA) a c CLI i • Command Line Interface l p p g .C, .java A n .C, .java i l p u - r o a e c t l e e • open source u d d M • job execution management e e d r h i r u • resource brokering GridWay c t S G c u r t s e r a r a f w n I e - l • Globus services n d o Globus d i i • Standard interfaces t a M • end-to-end (e.g. TCP/IP) c i d l i r p p G A PBS SGE Infrastructure • highly dynamic & heterogeneous • high fault rate DSA Group 5/29 A Global Vision GridWay Benefits Integration of non-interoperable computational platforms (Organization) • Establishment of a uniform and flexible infrastructure • Achievement of greater utilization of resources and higher application throughput Support for the existing platforms and LRM Systems (Sys. Admin.) • Allocation of grid resources according to management specified policies • Analysis of trends in resource usage • Monitoring of user behavior Familiar CLI and standard APIs (End Users & Developers) • High Throughput Computing Applications • Workflows DSA Group 6/29 A Global Vision GridWay Features Workload Management • Advanced (Grid-specific) scheduling policies • Fault detection & recovery • Accounting • Array jobs and DAG workflows User Interface • OGF standards: JSDL & DRMAA (C and JAVA) • Analysis of trends in resource usage • Command line interface, similar to that found on local LRM Systems Integration • Straightforward deployment as new services are not required • Interoperability between different infrastructures DSA Group 7/29 A Global Vision GridWay GridWay Internals DRMAA library CLI Job Submission Job Monitoring GridWay Core Request Job Control Manager Job Migration Job Pool Host Pool Dispatch Scheduler Manager Transfer Execution Information Manager Manager Manager pre-WS WS MDS2 GridFTP RFT MDS2 MDS4 GRAM GRAM GLUE Job Preparation Job Termination Resource Discovery Job Migration Resource Monitoring Grid Grid Grid File Transfer Execution Information Services Services Services DSA Group 8/29 Contents GridWay 1. What is GridWay? 2. A Global Vision 3. Scheduling Policies 4. Scheduling Infrastructures 5. The GridWay Project DSA Group 9/29 Scheduling Policies GridWay • Rank Expressions • Fixed Priority Resource Policies • User Usage History • Failure Rate Grid Scheduling = Job + Resource Policies Pending Matching Resources for each job (user)‏ Jobs Job Policies • Fixed Priority • Urgent Jobs • User Share • Deadline • Waiting Time DSA Group 10/29 Contents GridWay 1. What is GridWay? 2. A Global Vision 3. Scheduling Policies 4. Scheduling Infrastructures 5. The GridWay Project DSA Group 11/29 Scheduling Infrastructures GridWay Centralized • Network Links Decentralized • Administration Coupled • Homogeneity Decoupled SMP (Symmetric MPP (Massive Network Systems Grid Clusters Multi-processors) Parallel Processors) Intranet/Internet Infrastructures High Performance Computing High Throughput Computing DSA Group 12/29 Scheduling Infrastructures GridWay Enterprise Grid Infrastructures Characteristics • “Small” scale infrastructures (campus/enterprise) with one meta-scheduler instance providing access to resources within the same administration domain that may be running different DRMS and be geographically distributed Goal & Benefits • Integrate multiple systems, that could be heterogeneous, in an uniform/centralized infrastructure • Decoupling of applications and resources • Improve return of IT investment • Performance/Usage maximization Scheduling • Centralized meta-scheduler that allows the enforcement of Grid-wide policies (e.g. resource usage) and provides centralized accounting DSA Group 13/29 Scheduling Infrastructures GridWay Enterprise Grids: Deployment with GridWay • DRMAA interface • Portal and/or CLI access Users Applications GridWay • Services: MDS, GRAM, GridFTP • One scheduling instance • Grid-wide policies Globus Globus Globus Middleware SGE Cluster PBS Cluster LSF Cluster • Could be heterogeneous and geographically distributed Infrastructure DSA Group 14/29 Scheduling Infrastructures GridWay Enterprise Grids: Examples European Space Astronomy Center • Data Analysis from space missions (DRMAA) • Site-level meta-scheduler • Several clusters DSA Group 15/29 Scheduling Infrastructures GridWay Enterprise Grids: Examples UABGrid, University of Alabama at Birmingham • Bioinformatics applications • Campus-level meta-scheduler • 3 resources (PBS, SGE and Condor) DSA Group 16/29 Scheduling Infrastructures GridWay Partner Grid Infrastructures Characteristics • “Large” scale infrastructures with one or several meta-scheduler instances providing access to resources that belong to different administrative domains (different organizations or partners) Goal & Benefits • Large-scale, secure and reliable sharing of resources between partners or supply-chain participants • Support collaborative projects • Access to higher computing power to satisfy peak demands Scheduling • Decentralized scheduling system that allows the enforcement of organization-wide policies DSA Group 17/29 Scheduling Infrastructures GridWay Partner Grids: Deployment with GridWay (Virtual) Organization • DRMAA interface • Science Gateways Users Users Applications GridWay GridWay • Services: MDS, GRAM, GridFTP • Multiple scheduling instances • (V) Organization-wide policies Globus Globus Globus Middleware SGE Cluster PBS Cluster LSF Cluster • Multiple Admin. Domains • Multiple Organizations Infrastructure DSA Group 18/29 Scheduling Infrastructures GridWay Partner Grids: Examples AstroGrid-D, German Astronomy Community Grid • Collaborative management of supercomputing resources & astronomy-specific resources • Grid-level meta-scheduler (GRAM interface) • 22 resources @ 5 sites, 800 CPUs DSA Group 19/29 Scheduling Infrastructures GridWay Partner Grids: Examples Massive Ray Tracing CD-HIT workflow Fusion Biomed Users Users • DRMAA interface • VO Schedulers GridWay EGEE RB GridWay • Services: BDII, GRAM, GridFTP • EGEE Resource Broker gLite gLite gLite SGE Cluster PBS Cluster PBS Cluster DSA Group 20/29 Scheduling Infrastructures GridWay A Tool for Interoperability • Different Middlewares (e.g. WS and pre-WS) • Different Data/Execution architectures • Different Information models • Integration through adapters • Global DN’s Users • Demo in June 2007, TeraGrid07 GridWay Globus/WS Globus/WS gLite gLite Globus/WS Globus/WS SGE Cluster PBS Cluster PBS Cluster SGE Cluster PBS Cluster SGE Cluster DSA Group 21/29 Scheduling Infrastructures GridWay Utility Grid Infrastructures Characteristics • Multiple meta-scheduler layers in a hierarchical structure • Resource provision in a utility fashion (provider/consumer) Goal & Benefits • Supply resources on-demand, making resource provision more adaptive • Access to unlimited computational capacity • Transform IT costs from fixed to variable • Seamless integration of different Grids (The Grid) Scheduling • Each Grid is handled as any other resource • Characterization of a Grid as a single resource • Use standard interfaces to virtualize a Grid infrastructure DSA Group 22/29 Scheduling Infrastructures GridWay Deploying Utility Grid Infrastructures with GridWay globus-job-run, Condor/G, Nimrod/G … Users GridWay Access to Outsourced Resources Globus Globus Globus Globus GRID-GATEWAY SGE Cluster PBS Cluster LSF Cluster Users Users GridWay Grid Infrastructure Globus Globus Globus Globus Virtualization of a Grid GridWay SGE Cluster PBS Cluster LSF Cluster Utility Grid Grid Infrastructure DSA Group 23/29 Scheduling Infrastructures GridWay Utility Grids: Example Users Applications • Access to different infrastructures with GridWay the same adapters • EGEE managed as other resource • Delegate identity/ “VO” Globus certificates • In-house/provider gateway GridWay Globus Globus gLite gLite Middleware SGE Cluster PBS Cluster PBS Cluster SGE Cluster Infrastructure • Regional infrastructure DSA Group 24/29 Contents
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