“Hardware and software infrastructure that provides dependable, consistent, pervasive and inexpensive access to high-end computational capabilities” (I. Foster)
səhifə 4/9 tarix 01.11.2017 ölçüsü 446 b. #24870
“Hardware and software infrastructure that provides dependable , consistent, pervasive and inexpensive access to high-end computational capabilities” (I. Foster) “Hardware and software infrastructure that provides dependable, consistent, pervasive and inexpensive access to high-end computational capabilities” (I. Foster) Performance criteria: security reliability computing power latency throughput scalability services Large scale Large scale Heterogeneity Multiple administration domain Autonomy… and coordination Dynamicity Flexibility Extensibility / Scalability Security Authentication/Authorization/Traceability Authentication/Authorization/Traceability Activity control (monitoring) Resource brokering Scheduling Job submission, data access/migration and execution Accounting End system (computer, disk, sensor…) End system (computer, disk, sensor…) multithreading, local I/O Cluster synchronous communications, DSM, parallel I/O parallel processing Intranet/Organization heterogeneity, distributed admin , distributed FS and databases load balancing access control Internet/Grid global supervision brokers, negotiation, cooperation… Resource sharing Resource sharing Computers, storage, sensors, networks, … Heterogeneity of device , mechanism, policy Sharing conditional: negotiation, payment, … Coordinated problem solving Integration of distributed resources Compound quality of service requirements Dynamic, multi-institutional virtual orgs Dynamic overlays on classic organization structures Map to underlying control mechanisms Description Description Advertising Cataloging Matching Claiming Reserving Checkpointing Services and protocols depend on the infrastructure Services and protocols depend on the infrastructure Some parameters stability of the infrastructure (same set of resources or not) freshness of the resource availability information reservation facilities multiple resource or single resource brokering Example of request: I need from 10 to 100 CE each with at least 512 MB RAM and a computing power of 150 Mflops Levels of scheduling Levels of scheduling job scheduling (global level ; perf: throughput) resource scheduling (perf: fairness, utilization) application scheduling (perf: response time , speedup, produced data…) Mapping/Scheduling process resource discovery and selection assignment of tasks to computing resources data distribution task scheduling on the computing resources (communication scheduling) Individual perfs are not necessarily consistent with the global (system) perf ! Individual perfs are not necessarily consistent with the global (system) perf ! Grid problems predictions are not definitive: dynamicity ! Heterogeneous platforms Checkpointing and migration What is to be stored ? What is to be stored ? virtual organizations, people, computing resources, software packages, communication resources, event producers , devices… what about data ??? A key issue in such dynamics environments Dostları ilə paylaş:
