April 2015
Intermediate to advanced
228 pages
4h 52m
English
Content preview from Implementing Cloud Design Patterns for AWSBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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On-demand disk pattern
The on-demand disk pattern is similar in nature to the scale up pattern, in that it operates on an already running instance and requires some downtime. This pattern is a manual process and might be avoided in automated processes such as the scale out pattern, as the downtime involved might cause alarm or scaling policies to trigger, causing some unwanted side effects.
The benefit of on-demand disk size is that you do not need to plan ahead for disk resources. Once the instance is running, you can simply resize its volume when it gets to its maximum capacity. Another example would be in the event where your application is very I/O heavy. At first your instance performs very well, but over time, with increased usage, the I/O ...
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