If you’re a database administrator (DBA), you may not be familiar with the Unix backup commands necessary to back up your database. If you’re a system administrator (SA), you may not be familiar with the architecture of your particular database platform. Both of these concepts are explained in detail in this book. I explain the backup utilities in plain language so that any DBA can understand them, and I explain database architecture in such a way that an SA, even one who has never before seen a database, can understand it.