Quantum DLTtape DLT 2000, Руководство пользователя

Страница: 14 / 219

gies. There is a greater demand for standard solutions, and robust,
highly reliable systems for mission critical applications. Large, global
enterprises demand global backup and disaster recovery plans.
The system-level trends we’ve been talking about – the move to
client/server, the emergence of Storage Area Networks, and the
strong trend toward centralized management of distributed storage
resources – are increasing the demand for bigger, smarter tape
backup systems. And that’s where the DLTtape system fits.
Now let’s look at another set of trends that are having a major
impact on tape backup issues. Namely, trends in applications.
Mission Critical Applications
Yesterday’s mission-critical applications were back office tasks like
payroll, accounts receivable, and accounts payable. They were mission
critical because the business needed them to function. Today’s mis-
sion critical applications must run 7x24, and they are often very cus-
tomer-oriented, highly visible, and strategic. E-commerce applica-
tions like on-line banking, ticketless airline reservations, or on-line
stock transactions are prime examples. Almost by definition, these
customer-interfacing applications are client/server applications, so
they have to run outside the protection of the old “glass-house”
mainframe environment.
This means that there is intense pressure to keep these applications
aggressively backed up, and within a shrinking window of time. If
the application is up on a 7x24 schedule, when can you do back-
ups? Solutions to this problem include more frequent backups,
more servers with their own dedicated backup systems, and bigger,
faster systems to fit backup into the shrinking backup window.
Clearly, the introduction of new high performance, high capacity
Super DLTtape systems has a major impact on backup capability.
THE EVOLVING TAPE STORAGE MARKET 1.6