Why Four Levels?
The only way to accurately track your growth trends, forecast precise outcomes, and improve budgeting accuracy is to collect data at all levels of the organization. Without the full picture, IT leaders may be at risk for unnecessary, reactive purchases.
Organizations may choose to start at either the top, the device level, or the bottom, the pool level, when it comes to capacity management planning. For companies starting at the top, the first question they might ask is, do I have enough capacity for all backups? They might have three devices for backup, and they notice that one device is out, so they start looking to upgrade that device. While that device may need to be upgraded, could data at another level provide additional information?
Let’s say that you have two big arrays, both doing production, and you’ve divided the workloads 50/50 between the arrays. Before long, it appears that one of the arrays needs a costly upgrade. From the array level, where most capacity planning is done, there seems to be no reason why one array has reached capacity faster than the other. But a more detailed look at the pool level shows that the growth trends for one array were different from the other. Rather than investing in an upgrade, all that was needed was to change the workloads.
No one is tracking at the pool level manually, but without monitoring at this level, IT leaders are leaving themselves open to problems. That’s why VSI helps IT leaders with a tool to do this for you.
The details that appear as a result of doing multi-dimensional capacity planning can offer further insight to IT leaders, helping them avoid surprise purchases, plan accordingly, and get the right storage in the right place at the right time for the right price.