HP StorageWorks 1606 Brocade Web Tools Administrator's Guide v6.3.0 (53-100134 - Page 67

Refresh rates 2 • The Configure option provides another menu of options to allow you to rename, enable, and disable ports, and to set persistent enable or disable without opening the Port Administration window. Refresh rates Different panels of Web Tools refresh at different rates. The refresh, or polling, rates listed in this section and throughout the book indicate the time between the end of one polling and the start of the next, and not how often the screen is refreshed. A refresh rate of 15 seconds does not ensure that a refresh occurs every 15 seconds. It ensures that the time between each refresh activity is no more than 15 seconds. Autorefresh intervals might be not be exactly 15 seconds. The refresh rate varies depending on the activity in the fabric and on the host system you are using. Following are some variables you should consider when refreshing the fabric: • Retrieval time increases when you are in a large fabric because there is more data to retrieve from the switches. • Processor speed of the system you are using may slow down the refresh rate. • OS-Job Scheduling if you are using a host-system in the data center impacts the refresh rate. • JVM-Performance can contribute to causing interval differences between what is on-screen and how long it is actually taking. For these reasons, the time displayed in the port statistics tab might not be refreshed as expected. The counter time indicates only that "this statistics data is retrieved from the switch in this time." To ensure the correct information, the time field is updated along with the port statistics data after every refresh. The refresh rates are different for each module. Table 7 lists polling rates by module. Though these rates are sample rates, they correctly illustrate variance in the refresh rates throughout Web Tools. TABLE 7 Polling rates Module Polling Rate Name Server Zoning Database Fabric Watch Performance Monitor (This feature requires the EGM license) Port Management FC Routing User-defined; 15 sec minimum 60 sec 45 sec 30 sec 60 sec 45-90 sec, depending on network traffic Displaying switches in the fabric If your fabric has more than one switch, you can open Web Tools from one switch and then access other switches. You can also launch Web Tools from the DCFM client as Element Manager to manage Web Tool requests in the case where the fabric is in a private network. Launch Web Tools from DCFM if you need to access the fabric from a host that is not in the same network and does not have direct access to the fabric. Web Tools Administrator's Guide 35 53-1001343-01