5.2. Non-Partitioning Techniques

Non-partitioning techniques place data over all the disk drives present in a heterogeneous, multi-node storage system [174], [27], [188]. Therefore, they are generally not affected by changing access patterns. A number of techniques exist and they differ in how they place data and schedule disk bandwidth. In its simplest form, such a technique is based on the bandwidth ratio of the different devices leading to the concept of virtual disks. A variation of the technique considers capacity constraints as well. These decisions impact how much of the available disk bandwidth and storage space can be utilized, and how much memory is required to support a fixed number of simultaneous displays.

We first assume a disk ...

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