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Oracle Exadata Expert’s Handbook by Tariq Farooq

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15. Exadata Smart Flash Cache in Depth

The Exadata Database Machine combines Flash solid-state disks with more traditional magnetic disks in order to achieve economic storage of large datasets together with the ability to achieve low latency and high throughput. In this chapter we review the architecture of Exadata Flash solid-state disk and examine in detail how Exadata Smart Flash Cache and Exadata Smart Flash Logging allow you to transparently leverage this Flash I/O.

Solid-State Disk Technology

To understand how Flash technology contributes to Exadata system performance and how best to exploit that technology, let’s start by comparing the performance and economics of Flash and spinning-disk technology.

Limitations of Disk Technology

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