Active Monitoring in GRID environments using Mobile Agent technology Orazio Tomarchio Andrea...
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Active Monitoring in GRID environments using Mobile Agent technologyOrazio TomarchioAndrea CalvagnaDipartimento di Ingegneria Informatica e delle TelecomunicazioniUniversit di Catania (ITALY)[email protected] [email protected]
Outline Monitoring Grid systems Mobile agents paradigms Mobile agents and monitoring MAP: a mobile agents platform Architecture description Conclusions
Grid MonitoringThe capability of monitoring distributed computational resources effectively is a crucial factor for high-performance distributed computation
As distributed systems become bigger, and more widely distributed, automating the operations of monitoring becomes very important.
Grid MonitoringWhy is monitoring important? to find the cause of performance problemsfor tuning systems parameters in order to optimize resource usagefault detectionto build prediction models of performance (used by sophisticated scheduling algorithms)for billing and accounting
Grid MonitoringWhat are the problems to deal with? Wasting of resources dedicated to monitoring purposesScalabilityPossibility to start monitoring application on-demandPossibility to customize monitoring strategiesDifferent metrics of measurement data
Grid Monitoring with Agents
Mobile code and agents:basic assumptions and characteristics Key issues for using mobile agents technology in the monitoring context
Mobile CodeThe basic idea is allowing to move code to remote sites and execute transferred code thereproblems arising from mobility, e.g.heterogeneity of systemssecurity (as more parties are involved)Programming paradigms based on mobile code can be divided according to initiator of code transfer
Programming paradigms based on code mobility
Mobile AgentsMobile Agents are program instances that are able move within a network under their own controlmobile agents consist of:code data state (i.e. variables)execution state (i.e. stack)Some basic capabilities:able to autonomously migrate between placesable to communicate to each othersome agents offer services or interfaces to legacy applications
Application Areas for Mobile AgentsDistributed Information RetrievalMobile computingDistributed Network ManagementCollaborative and workflow applicationsActive networksElectronic commerce Grid monitoring (?)
Grid Monitoring with agents: key issuesCustomizable algorithms of data analysis dinamically executed on-demand by the userReduction of network loadFiltering of monitoring data at several abstraction level without high overheads for the systemAsynchronous and indipendent execution of taskIntegration of heterogeneous resource monitoring toolsOn-demand enabling of necessary services
MAP: a Mobile Agent Platformhttp://sun195.iit.unict.it/MAP/MAP is a software platform for the development and the management of mobile agents. Its main characteristics are:It provides an environment in which agents can execute, stop and resume their execution, communicate among them, move on other nodes on the networkIt is entirely developed using the Java language, which provides total architecture independenceThe platform also provides different programming paradigms for distributed systems, such as remote evaluation and code on demandIn the latest version it has been made MASIF compliant
MAP architecture MAPServerMAPServerRegionRegistratorRegionMAPServerMAPServerRegionRegistratorRegion
Graphic interface for agents control and management
Main features of MAP
Key features of MAP relevant for Grid systems are:
securityinteroperability with different agents systems
Monitoring with agents: System ArchitectureDirectoryServiceAgent CacheRepositoryPerformanceData RepositoryResource
Monitoring with agents: Basic componentsLow-Level sensors (LLSensors)SensorAgentsHigh-Level Monitoring Agents (HLMAgents)
Low-Level Sensor Manager (LLSManager)Directory ServicePerformance Data RepositoryAgent Cache Repository
Monitoring with agents: Basic componentsLow-Level sensors (LLSensors)
they are not agents (in general)specific for each resourcedirectly interfaced with resources
The Low-Level Sensor Manager deals with their registration in the Directory Service
Monitoring with agents: Basic componentsSensor AgentsThey use the data supplied by the LLSensors for providing uniform informations about the state of a resourceResources taken into account include:hostsnetworkstorageprocess/applications
Monitoring with agents: Basic componentsHigh-Level Monitoring Agents (HLMAgents)
Their task is gathering significant information relying on all the agents present in the systemuser or application initiated (e.g. CollectSensorAgent, AggregateAgent)event-initiated (e.g. TrapAgent)
Monitoring with agents: Basic componentsDirectory Service
Basically the Directory Service maintains informations on what kind of Sensors are available for the different resources.
Monitoring with agents: Basic componentsPerformance Data Repositoryto store the events and data recorded by LLSensors and SensorAgents
Agent Cache Repositorya repository of agents that have been executed within the region
Piano temporale attivitPeople2 persone al 30%Orazio TomarchioAndrea Calvagna
Piano temporale attivitTaskstask 1 M0-M1 Evaluation of mobile agent technology for Grid network monitoring
task 2 M0-M2 Use and testing of MAP (Mobile Agent Platform) in a Grid environment (eventually adapt it to new requirements imposed by geographically dispersed environment)
task 3M1-M4 Definition of a base architecture for monitoring networks using mobile agents
Piano temporale attivitTaskstask 4 M2-M3 Evaluation of this approach against more traditional approach
task 5 M4-M9 Integration/Interfacing the agent platform with existing low-level tools for gathering network informations.
task 6M4-M12 Implementation of the proposed approach and experimental measurements and validations.