User manual QUANTUM DXI ADVANCED REPORTING REV A

[. . . ] User 's Guide User 's Guide User 's Guide User 's Guide DXi Advanced Reporting DXi-Series 6-67004-01 Rev A Quantum DXi Advanced Reporting User's Guide, 6-67004-01 Rev A, June 2010, Product of USA. Quantum Corporation provides this publication "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. Quantum Corporation may revise this publication from time to time without notice. Making copies or adaptations without prior written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of the law. [. . . ] Tape drives, tape cartridges, and disk drives report capacities in units of 1000. DXi Advanced Reporting automatically selects the appropriate base for each DXi model so that numeric results most closely match what is displayed in the DXi remote management pages. To display data using a different base, select it in the Base list on the button bar (see Figure 15). DXi Advanced Reporting adjusts all report data to reflect the selected base. Quantum DXi Advanced Reporting User's Guide 33 Chapter 3: DXi Advanced Reporting Navigation Working With Graphs Figure 15 Selecting a Base Base list First, Last, and Delta The graph legend for some graphs includes first, last, and delta values for variables in the graph. · first - The value of the variable at the start of the time range. · last - The value of the variable at the end of the time range. · delta - The net change in the value of the variable over the time range (last minus first). DXi Advanced Reporting provides these values so you do not have to try to estimate them visually from the graph. Gaps in Graphs A white gap in a graph indicates an absence of logging data for a period of time. This can occur for the following reasons: · A system reboot occurred. · No DXi Advanced Reporting logging took place because the system was busy. Upgrading the software on a DXi3500/5500 system turns off DXi Advanced Reporting logging. Reinstalling DXi Advanced Reporting does not remove or replace the existing logging database, and all previously logged data is preserved. Note: For information about installing DXi Advanced Reporting, see DXi Advanced Reporting Installation on page 7. Stacked and Layered Graphs DXi Advanced Reporting often displays data for multiple variables on the same graph. This lets you see the interaction between different variables. Quantum DXi Advanced Reporting User's Guide 34 Chapter 3: DXi Advanced Reporting Navigation Working With Graphs DXi Advanced Reporting uses two different methods for placing multiple variables on the same graph: · Layered Graphs · Stacked Graphs Layered Graphs DXi Advanced Reporting uses layered graphs to compare related variables. A layered graph superimposes data for two or more variables on top of one another. DXi Advanced Reporting assigns a different color to each variable, so you can see how the values for each variable differ over time. For example, in the Data Volume Overview graph (see Figure 16), DXi Advanced Reporting displays a separate value line for the variables Before Reduction, After Reduction, and Unique Data. Note: DXi Advanced Reporting always displays the smaller variable in front of the larger variable. Because of this, shifts in the color pattern in a graph can occur if the variable that was smaller becomes larger at some point in time. Figure 16 Layered Graph Stacked Graphs DXi Advanced Reporting uses stacked graphs to display aggregate performance. A stacked graph adds together values for two or more variables to arrive at a total value. DXi Advanced Reporting assigns a different color to each variable, so you can see the contribution that each variable makes to the total. Quantum DXi Advanced Reporting User's Guide 35 Chapter 3: DXi Advanced Reporting Navigation Working With Graphs For example, in the Fibre Channel Activity graph (see Figure 17), values for each Fibre Channel port are added together to reach a total value for each point in the time range. Figure 17 Stacked Graph The Zero Line DXi Advanced Reporting uses graphs with a zero line to show when the DXi system is being written to or being read from. · Positive values (above the line) represent data being written to the system. [. . . ] Deferred Deduplication The mode of deduplication which begins only after the deferred deduplication window. Typically, deferred deduplication begins after the backup ingest is complete. Deferred Deduplication Window A defined window during which no deduplication will take place. This allows maximum system resources to be devoted to data ingest thus allowing a faster backup. [. . . ]