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TruCluster Server V5.0 Technical Overview John Zimmerman Digitask Consultants, Inc.

State of the Art UNIX High Availability. TruCluster Server V5.0 Technical Overview John Zimmerman Digitask Consultants, Inc. digitask@digitask.com (212) 682-6652. Agenda. TruCluster History TruCluster Server V5.0 functional overview Application support

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TruCluster Server V5.0 Technical Overview John Zimmerman Digitask Consultants, Inc.

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  1. State of the Art UNIX High Availability TruCluster Server V5.0 Technical Overview John Zimmerman Digitask Consultants, Inc. digitask@digitask.com (212) 682-6652

  2. Agenda • TruCluster History • TruCluster Server V5.0 functional overview • Application support • TruCluster Server V5.0 software components

  3. TruCluster Technology Waves Version 1 Version 1.6 Version 5 Version n Production Server Theme: HA and Scalable Applications Delivered: Q1CY96 Applications: OPS and Informix XPS Synchronization Service Membership Service Cluster Disk Service, IO Barriers Memory Channel Shared SCSI and FC Extended Cluster DT SSI Server Theme: SSI Storage and System Management ESP:Q2CY99 Vol:Q1CY00 Cluster File System Cluster Alias Cluster Volumes Application Availability Cluster wide Events Cluster Disk Service Shared SCSI and FC Extended Cluster DT SSI Server Theme: SSI Process Management Planning: H1CY01 Integration of NSC SSI Process Management Automatic Load Balancing Process Migration Multi-Cluster DT Available Server Theme: HA Applications Delivered: Q1CY94 HA applications: SAP, Oracle, Tuxedo, INET, Sybase, Informix, ... Membership, Storage Monitoring and Management AdvFS, LSM, HW RAID Shared SCSI, Standard Networks

  4. TruCluster Server Version 5.0 • Single System Image cluster • Shared file system • Dramatically easier management • Simpler application availability and scalability

  5. / /usr /var /... /... /... /... /... /... Feature Summary • Cluster viewed as a single highly available system • System and Storage Management • Binary compatibility with Tru64 UNIX V5.0 and prior versions

  6. Feature Summary • Cluster components are the enabling technology • Cluster File System for coherent access to all file systems, including the root • Cluster wide storage • Cluster Alias for single system view from the network • Cluster Application Availability services • Support for larger & more flexible configurations • No requirement for symmetric configurations • No need for private storage (all storage can be on shared buses)

  7. System and Storage Management • CFS is an enabling technology • Most management operations “just work” • Single copy of most configuration files • Device names are consistent cluster-wide • Storage devices are available everywhere • Fewer things to manage • Operating system and applications installed once per cluster • Automatic disk and file system failover • Single security domain • Base and Enhanced Security • BUT… Still must manage some things separately • Kernel tuning, process tuning • Network adapter, tty configuration • Licensing

  8. Application Support • Binary compatibility with Tru64 UNIX V5.0 • Applications need only be installed once in the cluster although may be licensed per node • Single instance applications • May only run on one member of a cluster at a time • Multiple copies would conflict with each other • Typical old-style ASE applications • Multiple instance applications • May run on multiple or all cluster members • Multiple copies don’t conflict • Some ASE applications can now run on multiple members • Cluster aware applications • Use cluster features such as the Distributed Lock Manager

  9. / /usr /var /... /... /... /... /... /... Cluster File System • Single cluster-wide namespace with a single shared root • Same view from all cluster members • Mechanism to address member-specific files • Client/Server Model Initially • Layers on existing file system types • AdvFS, NFS, UFS (r/o), CDFS • Transparent file system failover and recovery • Integrated with Cluster Alias for NFS server

  10. Cluster Application Availability • Provides application failover or restart within the cluster • Application and Resource dependencies • Application profile determines failover policy and dependencies • Mechanism for application-specific monitoring • Monitoring of applications via ‘check’ entry in action script • Command line and GUI-based management • ASE application start/stop scripts easily migrate with minimal changes

  11. Router Cluster Alias Client Client Client • Cluster appears as single system to network • Can support multiple aliases • Single host name to clients • Transparent handling of node and adapter failures • Dynamic load balancing • Network services • Efficient forwarding over cluster interconnect Cluster - canine 1.1.1.0 Retriever AlphaServer labrador 1.1.1.1 AlphaServer golden 1.1.1.2 AlphaServer basset 1.1.1.3 AlphaServer bluetick 1.1.1.4 Hound

  12. Private Disks System Disk Private Disks System Disk TruCluster V1.x Production Server HSZx0 HSZx0 Shared Disks & Tape Memory Channel Interconnect

  13. Local Disks Local Disks TruCluster V5.0 Server Shared Disks & Tape HSZx0 HSZx0 Memory Channel Interconnect

  14. Thank You John Zimmerman johnz@digitask.com (212) 682-6652

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