August 2009
Intermediate to advanced
464 pages
13h 59m
English
Content preview from SQL Server 2008 Administration in Action
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2.1. Characterizing I/O workload
To determine an application's ideal storage system and disk quantity, it's important to understand the type and volume of I/O the application will generate. This section focuses on the different types of I/O, the metrics used to classify workload, and methods used in measuring and estimating values for the I/O metrics.
In section 2.2, we'll take the information we've learned here and use it to derive the number of disks required to support an application's I/O workload.
2.1.1. OLTP vs. OLAP/DSS
When classifying the nature of I/O, two main terms are used: OLTP and OLAP. An example of an OLTP database is one that stores data for a point-of-sales application, typically consisting of a high percentage of simple, ...
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