DISTRIBUTED AND PARALLEL SYSTEMS Grid Technologies - Practical Lab - - PowerPoint PPT Presentation
1 SELECTED TOPICS IN DISTRIBUTED AND PARALLEL SYSTEMS Grid Technologies - Practical Lab Lab 10 Schedule 2 Discussion of Homework 07-A Remaining assignments Discussion of Homework 07-B Material required for next Assignment
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Discussion of Homework 07-A
Remaining assignments
Discussion of Homework 07-B Material required for next Assignment
Metacomputing Directory Service (MDS) Java Naming and Directory Interface (JNDI)
Overview on Homework 08
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Architecture for a Grid Information Service
Defines architecture
Information Provider (IP) - sensors Grid Resource Information Service (GRIS) – one resource Grid Index Information Service (GIIS) – data aggregation Defines Protocols
Uses LDAP to represent / query information Defines standard data schema (GLUE) Relation between elements (push / pull)
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LDAP directories
Tree of directory entries
Each entry has unique identifier, its Distinguished Name (DN)
Entries consist of attributes
Each attribute has a name, a type and one or more values
A schema is defining the organization of the data
LDAP protocol
Allows to specify search and update operations
See http://en.wikipedia.org/wiki/LDAP
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Java Naming and Directory Interface Part of the standard Java API Unified interface for naming and directory services Supports LDAP To conduct a LDAP query: Specify target server Specify filter, requested attributes and scope of search See source code example on lab HP Useful tool: LDAP browser (e.g. luma) http://luma.sourceforge.net/