May 3rd, 2010
Cluster Basis & type of Clusters
Cluster Basis & type of Clusters.
Two or more computers that work together to perform a task is called a cluster.
Example:
Storage Cluster Provides a consistent file system image across servers in a cluster, which allows servers to simultaneously read and write to a single shared file system.
Type of clusters:
Load Balancing cluster to dispatch network service requests to multiple cluster nodes.
Storage cluster to provide consistent file system storage image.
High Performance cluster to perform concurrent calculations for applications.
High Availability or Fail-over clusters provides continuous availability of services.
Example:
Red Hat Cluster is an integrated set of software components. RHCS consists of the following major, components.
Cluster infrastructure - which Provides fundamental functions for nodes to work together as a cluster.
High-availability Service Management — Provides failover of services from one cluster node to another in case a node becomes inoperative.
Cluster administration tools — Configuration and management tools for setting up, configuring, and managing a Red Hat cluster.
Linux Virtual Server (LVS) — Routing software that provides IP-Load-balancing.
Other optional package (and not part of Red Hat Cluster Suite) are as follows:
GFS (Global File System) and GFS2 (Global File System2) allows multiple nodes to share storage at a block level as if the storage were connected locally to each cluster node.
Cluster Logical Volume Manager (CLVM) — Provides volume management of cluster storage.
