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In this way , Performance Manager maintains significant historical data without the cost of an ever-increasing database size . They even take online classes and develop Web sites or online educational experiences for use by others . They participate in online study groups . Management of large-scale storage networks requires proactive diagnostics , tools to verify connectivity and route latency , and mechanisms for capturing and analyzing traffic . Summary views of networkwide historical statistics are needed to identify hotspots quickly . The use of GOLD can be used as a preemptive measure on the part of Network Administrators to ensure the hardware serving the needs of the Data Center is functioning correctly . Many of these approaches blur the boundaries between SAN security , best-practice SAN design , and high-availability SAN design , but all are important from the perspective that a correctly configured , secure switch can help prevent both deliberate and unintentional disruptions . Once the link stabilizes , it is moved back to an online state . Power-on self test ( POST ) and online diagnostics provide proactive health monitoring . The third angle is less straightforward and only minimal or no attention in the past has been paid to unintentional security threats from authorized users . Historical performance analysis tools provide excellent trend information , but capture statistics only several times per hour , so they lack the capability to show what is happening in real time on the network .