Remember how we said a CDN has computers distributed all over the world? Netflix developed its own computer system for video storage. Netflix calls them Open Connect Appliances or OCAs. Here’s what an early OCA installation in a site looked like: There are many OCAs in the above picture. OCAs are grouped into clusters of multiple servers.

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Netflix has developed Open Connect Appliances (OCAs) for video storage. These OCAs are fast servers with large storage capacity. They use commodity PC components and the FreeBSD operating system. Netflix places OCAs in ISP data centers and internet exchange locations to build its CDN.