Availability and Clustering Software
Application clustering (sometimes called software clustering) is a method of turning multiple computer servers into a cluster (a group of servers that acts like a single system). Clustering software is installed in each of the servers in the group. Each of the servers maintains the same information and collectively they perform administrative tasks such as load balancing, determining node failures, and assigning failover duty. The other clustering method, hardware clustering, requires that specialized hardware be installed in a single server that controls the cluster.
Шn application or software clustering, some of the protocols and administrative duties that would have been handled on each individual machine are handled by the joint software program. In other words, the software application is the control unit for the cluster. This is contrasted with a system called hardware clustering, where one individual machine runs the cluster through its operating system.
One of the advantages of application clustering is the scalability of these kinds of systems. With available specialized software, companies can easily set up multiple pieces of hardware that obey the same instructions, and refer to the same sets of information. IT pros refer to a cluster-aware application as an application that can assess systems to assign failover duties or handle delegation for transaction processing. These are kinds of principles supported by application clustering.
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F.A.Q about Availability and Clustering Software
What does Cluster (Servers) mean?
A cluster, in the context of servers, is a group of computers that are connected with each other and operate closely to act as a single computer. Speedy local area networks enhance a cluster of computers' abilities to operate at an exceptionally rapid pace.
What does Clustering mean?
Clustering, in the context of databases, refers to the ability of several servers or instances to connect to a single database. An instance is the collection of memory and processes that interacts with a database, which is the set of physical files that actually store data.
Clustering offers two major advantages, especially in high-volume database environments:
- Fault tolerance: Because there is more than one server or instance for users to connect to, clustering offers an alternative, in the event of individual server failure.
- Load balancing: The clustering feature is usually set up to allow users to be automatically allocated to the server with the least load.