The Art of Capacity Planning: Scaling Web Resources in the Cloud by Arun Kejariwal & John Allspaw

Author:Arun Kejariwal & John Allspaw [Kejariwal, Arun]
Language: eng
Format: azw3, epub
Publisher: O'Reilly Media
Published: 2017-09-21T04:00:00+00:00

Figure 4-2. Total disk consumption: cumulative view

Now, let’s add another constraint: the total currently available disk space. Let’s assume for this example that there’s a total of 20 TB (or 20,480 GB) installed capacity. From the graph, we note that about 16 TB of storage has been consumed. Adding a solid line extending into the future to represent the total installed space, we obtain the graph shown in Figure 4-3. This illustration demonstrates a fundamental principle of capacity planning: predictions require two essential bits of information — the ceilings and the historical data.

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