1. Introduction to MC/ServiceGuard H6487S I.02 Module 2

2. 2 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. pkgB pkgA hub root mirror root mirror pkgA mirror pkgB mirror System A System B Introducing MC/ServiceGuard

3. 3 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. pkgB pkgA hub root mirror root mirror pkgA mirror pkgB mirror System A System B High Availability with MC/ServiceGuard

4. 4 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. Features and Benefits of MC/ServiceGuard Features Highly Available Cluster ( applications recover to alternate nodes in < 60 seconds) LAN failure protection (fast local switch to standby LAN adapter inside same node) Application Packages allow all resources for a package to be defined in one place Automatic cluster reconfiguration after a node failure Intelligent cluster reconfiguration after a node failure No idle resources Facilitates online hardware and software updates Mixed Series 800 class nodes Benefits Applications remain available to users, even after a hardware or software failure LAN card failures do not cause an application outage Applications can be moved easily and transparently without client reconfiguration No manual user intervention is needed to recover from a node failure Data integrity is preserved during a node failure (i.e. no “split-brain” syndromes) Every node runs a production application Applications available during hardware and software upgrades Flexible load balancing during failover

5. 5 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. How MC/ServiceGuard Works Bridge Package A Package B Root1 Node1 Package C Node2 Root2 Mirror Lan 0 Bridge Root3 Package D Package E Package F Node3 Lan 1 Package A Disk Package B Disk Package C Disk Package D Disk Package E Disk Package F Disk Package A Mirror Package B Mirror Package C Mirror Package D Mirror Package E Mirror Package F Mirror Volume Groups and Mirrors

6. 6 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. Service Processes: App_Process_1 App_Process_2 Middleware_1 Middleware_2 Volume Groups: /dev/vg01 /dev/vg02 IP Address: 156.152.194.134 MC/ServiceGuard Packages Simple, flexible Packages group all the resources for an applications, including: – volume group – IP address – service process Packages are the entities that are managed and moved within a cluster environment pkgA pkgB pkgC

7. 7 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. If Node 1 fails... Redistributing Application Packages Balancing workload after a node failure Minimizes impact on remaining nodes pkgA pkgB pkgC pkgE pkgF pkg G pkgH pkgI pkgJ pkgApkgBpkgC

8. 8 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. Minimizing Planned Downtime Move packages to alternate nodes. Perform hardware or software upgrades, maintenance. Move packages back. Backward compatibility: OS MC/ServiceGuard E F A I J C G H B A B I J E G H D C HP-UX 11.00 Upgrade from HP-UX 11.00 to HP-UX 11i Upgrade from HP-UX 11.00 to HP-UX 11i HP-UX 11.00

9. 9 H6487S I.02© 2003 Hewlett-Packard Development Company, L.P. MC/ServiceGuard Bundle/Products MC/ServiceGuard is bundled using Software Distributor. MC/ServiceGuard must be installed on every node in the cluster. MC/ServiceGuard Bundle - B3935DA Cluster Monitor Product Package Manager Product EMS Product MC/SG Patches MC/SG Toolkits SGMgr Product