Red Hat Cluster SuiteHP User Society / DECUS17. Mai 2006Joachim SchröderRed Hat GmbH
Handling FailuresSoftware Failures●Monitoring provided by resource agents handles restarting●If a resource fails and is correctly restarted, no other
After a node failure...Node 0 Node 1ClientsNetwork Power SwitchSANOracleNFSbindHeartbeat
Data SharingPurpose: parallel access to data resources●Files and Directories●Needed identical or single dataData Sharing technologies●SAN – block ba
Red Hat Global File System v6.1New version for Red Hat Enterprise Linux v.4●Uses new common cluster infrastructure in Red Hat Cluster Suite (included
Distributed Lock ManagerRed Hat Cluster Suite v.4 includes a Distributed Lock Manager (DLM)●Primarily used by Red Hat Global File System●Available fo
Cluster Logical Volume Manager (CLVM)CLVM builds upon LVM 2.0 and the kernel device mapper component included in 2.5 and 2.6 Linux distributionsEsse
Topology:- 2 or mode nodes- NIC card- NO shared storageApplications:- Read-only data- Small web serving- NFS/FTP serving- Edge of networkData model:-
Use Case: Shared file datastore, NASRed Hat Enterprise Linux (NFS)Uses an external NFS file serverNetApp, etc.Shared storage – file based (NFS)Clus
Two Key Industry TrendsClustering (scale-out) is happening●20% of all servers shipped will be clustered by 2006. - Gartner●Linux clusters are growing
Use Case: Shared block datastore, SANRed Hat Enterprise Linux (ext3, integrated HBA drivers)Offers higher, SAN-based, performanceShared storage – b
Use Case: Concurrent file system accessRed Hat Enterprise Linux + Red Hat Global File System●Includes Red Hat Cluster SuiteShared file system access
About Piranha & IPVSPiranha●Front-end to IPVS (or LVS) which enables IPVS director failover●Provides a web-based configuration GUIIPVS – does t
Piranha ArchitectureAppears as one mega-machine to clients: SSI at the IP levelOne or two nodes acting as IPVS directors●Stand-alone cluster: Not de
Piranha ArchitecturePrimary BackupRS0 RS1 RS2InternetHeartbeatVirtual IPDirectorReal Server
Piranha – Real Server FailurePrimary BackupRS0 RS1 RS2InternetHeartbeatVirtual IPDirectorReal Server
Piranha – Director FailurePrimary BackupRS0 RS1 RS2InternetVirtual IPHeartbeatDirectorReal Server
Red Hat and GFS Joint Linux Clustering SolutionHP Serviceguard for Linux creates a cluster of Linux servers that make application services available
Questions?
Vielen Dank!Joachim Schröder, Solution [email protected]
What if you could...
Clustering - motivationReduce TCO by:●Consolidate services to fewer systems●Simplify management tasks●Increase service uptimeApproaches:●Scale-up: f
Clustering – “ buzzwords” Application Failover ●Detect service failures and failover to standby systemsLoad Balancing●Distribute service load over
Red Hat Clustering ArchitectureRed Hat Cluster Suite provides●Application failover●Improves application availability●Included with GFS●Core services
Red Hat Cluster Suite: Core Cluster ServicesCore functionality for both Clustering and GFS is delivered in Red Hat Cluster Suite●Membership managemen
Red Hat Cluster Suite OverviewProvides two major technologies●High Availability failover – suitable for unmodified applications●IP Load Balancing –
Red Hat Cluster Manager ArchitectureNode 0 Node 1ClientsNetwork Power SwitchSANOracle NFSbindHeartbeat
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