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Cluster Infrastructure BoF Bruce J. Walker

Cluster Infrastructure BoF Bruce J. Walker. Cluster BoF. Cluster Summits What is a cluster Information about Clusters Types of clusters Characteristics of clusters Cluster components Clusters and Xen Cluster Issues. Cluster Summits. Waldorf, Germany Summit – June, RH

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Cluster Infrastructure BoF Bruce J. Walker

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  1. Cluster Infrastructure BoFBruce J. Walker

  2. Cluster BoF • Cluster Summits • What is a cluster • Information about Clusters • Types of clusters • Characteristics of clusters • Cluster components • Clusters and Xen • Cluster Issues

  3. Cluster Summits • Waldorf, Germany Summit – June, RH • Daniel Phillips will discuss in next BoF • OLS Summit – Monday/Tuesday this week • Set up via OSDL cluster sig (clusters_sig mailing list

  4. OLS Summit • Attendees: • HP (OpenSSI), IBM (HA-Linux), ORNL (Oscar, etc.), MontaVista (Virtual Synchrony), Novell (CIM/DMTF), Suse, Cassat, RH (CLVM), Steeleye, … • Notes will be sent out on clusters_sig mailing list • Talks: Ha-Linux; Virtual Synchrony, DMTF/CIM • Discussion: CLVM, cman GFS, DLM OCFS2 integration; component interop and substitution; memory pressure

  5. What is a Cluster? • Multiple machines working together; • Standard computers with an OS kernel per node; • Peers, working together • NOT client-server • NOT SMP or NUMA (but have SMP or NUMA nodes) • Clusters and Grids? • Grids are loose and can cross administrative lines; • Use a grid only if you can’t set up a cluster; • The best grid would be a collection of SSI clusters;

  6. Information about clusters • Clusters_sig mailing list (OSDL) • Linux_clusters mailing list (RedHat) • Sourceforge cluster web site • Projects • Linux-ha.org, openssi.org, openmosix.org, kerrighed.org, bproc.org, OCFS2, GFS, Luster • Products • Scyld, Steeleye, RH, Suse, HP (ServiceGuard), IBM, linux-ha • ….

  7. Many types of Clusters • High Performance Clusters Beowulf; 1000 nodes; parallel programs; MPI • Load-leveling Clusters • Move processes around to borrow cycles (eg. Mosix) • Web-Service Clusters • LVS; load-level tcp connections; Web pages and applications • Storage Clusters • cluster filesystems; same view of data from each node; GFS, OCFS2 • Database Clusters • Oracle RAC; • High Availability Clusters • ServiceGuard, Lifekeeper, Failsafe, ha-linux, failover clusters

  8. Availability Scalability Manageability Usability Ideal Linux Cluster Perfect Cluster in all dimensions SMP SMP Typical HA Cluster Ideal Linux Cluster log scale HUGE ReallyBIG

  9. Cluster Components • Membership • Communication • Group Membership and Communicaiton • Virtual Synchrony • DLM • CLVM • Cluster Filesystems • Networking (Linux Virtual Server) • Cluster Process Management • Scheduling/ Workload Mgmt • Remote Fileblock • Remote IPC • Distributed Shared Memory (DSM) • DMTF / CIM

  10. Clusters and Xen • HA across DomU • On same host / on different hosts • HA across Dom0 • Restart VMs • Load balancing • http://www.cix.co.uk/~tykepenguin/xencluster.html

  11. Clustering Issues • Different Cluster managers • Apis and resource mgmt • Interoperability of cluster components • CIM model for clusters / what apps want • Clusters of Clusters • Overlaping membeship

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