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Modern relational DataBase Systems (DBMSes) are often a critical part of the IT infrastructure for many enterprises. In many cases, the success of an IT system is highly dependent on the performance of its database systems. The choice of how database objects, e.g. tables and indexes, are assigned to disks is often a significant factor in determining the I/O performance of the system. It is a common practice for DBAs to rely on fully striping objects across all available disks in order to achieve I/O parallelism. Similar techniques are also suggested in user manuals and are implemented in automatic storage features, for example in DB2.
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