APPENDIX A

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RAID Concepts

In the not too distant past, a 1TB-sized database was considered to be pretty big. Currently, 1PB–2PB defines the lower boundary for a large database. In the not too distant future, exabyte, zettabyte, and yottabyte will become commonly bandied terms near the DBA water cooler.

As companies store more and more data, the need for disk space continues to grow. Managing database storage is a key responsibility of every database administrator. DBAs are tasked with estimating the initial size of databases, recognizing growth patterns, and monitoring disk usage. Overseeing these operations is critical to ensuring the availability ...

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