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Introduction to Gangalia: A Distributed Monitoring System for High-Performance Computing

Gangalia is a powerful distributed monitoring system designed for high-performance computing environments. It enables the management of multiple computers, identification of system trends, increased performance, and problem identification. Through its hierarchical architecture, Gangalia monitors nodes, clusters, and grids, providing vital statistics such as CPU usage, memory consumption, disk space, and network activity. With lightweight services and visualization tools, Gangalia simplifies performance monitoring while ensuring scalability and reliability in data management across systems.

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Introduction to Gangalia: A Distributed Monitoring System for High-Performance Computing

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  1. Gangalia Distributed monitoring system

  2. Why Monitor? • Requirements • Manage many computers • Spot trends in the system • Increase Performance • Identify problems • Applications

  3. Monitoring Grids • Grid consists of • Nodes ( A single machine) • Clusters (Collection of Nodes) • Grids (Collection of Clusters) • General Objective of Grid: To perform high performance computing. • Solution: Monitor at levels.

  4. Monitoring Nodes • Nodes • A terminal with single/multiple processors. • Factors to monitor • Temperatures • CPU/Memory Usage • Disk space • Network Activity • Jobs • Provide vital statistics of each node.

  5. Monitoring Clusters & Grids • Clusters & Grids • Collection of Nodes • Factors to monitor • Load • Processing power • Uptime • Availability • Provides performance statistics

  6. Ganglia • Gangalia: is distributed monitoring system. • Based on a hierarchical structure • Lightweight :- low overhead and high concurrency. • Prominent Features:- • Visualization using graphs • Selective statistics

  7. Gangalia: Architecture [IBM (2008), 'Perormance Monitoring using Ganglia', IBM Manual - Wiki.]

  8. Gangalia: Gmond • Lightweight service • Records and sends data via XDR • CPU statistics • Memory statistics • Network statistics • Job statistics • Uses XML over TCP

  9. Gangalia: Gmtead • Lightweight service • Receives and sends data obtained from • Gmond • Gmtead • Saves data on disk using RRD (round robin database) • Supports multiple creation of monitoring domains • Reason: Gangalia is very scalable

  10. Gangalia: Web Server & GUI Tools • GUI Tools • PHP scripts which extract data from Gangalia • Generates visualization using graphs. • Web Server • Apache + PHP support to hosts and execute scripts • SSL and XML support is required.

  11. Gangalia: gstat • gstat • Command line tool to extract gmond for information. • Syntax: $gstat --help Usage: gstat [OPTIONS]... -h --help Print help and exit -V --version Print version and exit -a --all List all hosts. Not just hosts running gexec (default=off) -d --dead Print only the hosts which are dead (default=off) -m --mpifile Print a load-balanced mpifile (default=off) -1 --single_line Print host and information all on one line (default=off) -l --list Print ONLY the host list (default=off) -n --numeric Print numeric addresses instead of hostnames (default=off) -iSTRING --gmond_ip=STRING Specify the ip address of the gmond to query (default='127.0.0.1') -pINT --gmond_port=INT Specify the gmond port to query (default=8649)

  12. Gangalia:Usinggstat

  13. Gangalia:gmetric

  14. Gagalia:Usinggmetric

  15. Building Monitoring Domains Using Gangalia

  16. [IBM (2008), 'Performance Monitoring using Ganglia', IBM Manual - Wiki.]

  17. Guidelines to Building Monitoring Domains

  18. Prerequisites • Finalize your IP • Finalize you Domain Name • Finalize your time zone • Update the time zone of the machine using NTP • Download following packages • Gangalia [http://sourceforge.net/project/showfiles.php?group_id=43021] • PHP [http://www.php.net/downloads.php] • Apache [http://www.apache.org/dyn/closer.cgi] • rrdtools[http://oss.oetiker.ch/rrdtool/download.en.html]

  19. Steps in Installing Gangalia • Map Monitoring Domains • Choose Central Nodes from Domains • Install gmond on Nodes • Install gmtead on Central Nodes • Install Web Server on Central Nodes

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