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  Metacomputing Directory Service (MDS)  Java Naming and Directory Interface (JNDI)  Overview on Homework 08

Homework 07-A / 07-B 3

Metacomputing Directory Service 5

MDS 6  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)

LDAP 7  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

JNDI 8  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/