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Scalability is the property of a system to handle a growing amount of work. One definition for software systems specifies that this may be done by adding resources to the system. One definition for software systems specifies that this may be done by adding resources to the system.
Merb began as a "clean-room" implementation [7] of the Rails controller stack but grew to incorporate several ideas that deviated from Rails's spirit and methodology at the time, most notably component modularity, extensible API design, and vertical scalability. It was developed by Ezra Zygmuntowicz and Yehuda Katz.
Database scalability is the ability of a database to handle changing demands by adding/removing resources. Databases use a host of techniques to cope. [ 1 ] According to Marc Brooker: "a system is scalable in the range where marginal cost of additional workload is nearly constant."
Database partitioning refers to intentionally breaking a large database into smaller ones for scalability purposes, distinct from network partitions which are a type of network fault between nodes. [1] In a partitioned database, each piece of data belongs to exactly one partition, effectively making each partition a small database of its own. [1]
Scalability testing is the testing of a software application to measure its capability to scale up or scale out in terms of any of its non-functional capability. Performance , scalability and reliability testing are usually grouped together by software quality analysts .
Horizontal partitioning is a database design principle whereby rows of a database table are held separately, rather than being split into columns (which is what normalization and vertical partitioning do, to differing extents). Each partition forms part of a shard, which may in turn be located on a separate database server or physical location.
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The potential of a production system to undergo this process is called its "scalability". Scaling is regarded the last step after the discovery, proof of concept and piloting of an innovation. In business it is often used as maximizing operational scale of the product. [ 1 ]