Chapter 2. Architecture and Concepts

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This chapter provides an overview of Red Hat Gluster Storage architecture and Storage concepts.

2.1. Architecture

At the core of the Red Hat Gluster Storage design is a completely new method of architecting storage. The result is a system that has immense scalability, is highly resilient, and offers extraordinary performance.
In a scale-out system, one of the biggest challenges is keeping track of the logical and physical locations of data and metadata. Most distributed systems solve this problem by creating a metadata server to track the location of data and metadata. As traditional systems add more files, more servers, or more disks, the central metadata server becomes a performance bottleneck, as well as a central point of failure.
Unlike other traditional storage solutions, Red Hat Gluster Storage does not need a metadata server, and locates files algorithmically using an elastic hashing algorithm. This no-metadata server architecture ensures better performance, linear scalability, and reliability.
Red Hat Gluster Storage Architecture

Figure 2.1. Red Hat Gluster Storage Architecture

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