8.3.1 A Volume Group Design Example
Two major aims in storage subsystem design are to achieve the optimum
performance for disk access requests (in other words, the fastest disk access
possible), and also to achieve the highest possible availability (in other words,
provide the system with as good a chance as is practically possible that disk
access requests will not fail). These aims are discussed in more detail
elsewhere, but it is important to note at this point that these aims can often
interfere with each other. In other words, a high availability configuration will
often result in slower access times to the data that is now stored in a highly
available state.
Sometimes, a particular configuration option will be beneficial for both
performance and ...