Viewing the Replication Journal I/O Report
The Replication Journal I/O report summarizes the number of bytes recorded in the journal for the specified LUN while replication has been suspended. When replication is resumed, all of these bytes have to be written to the secondary data center to bring its LUN in sync.
This report also displays the number of bytes that have been received from the Edge that are in the process of being written to the secondary data center. A high value indicates possible issues in the secondary data center write path.
Note: The Replication Journal Bytes Pending (on disk) report only shows information while replication is suspended or is being re-synchronized. The Replication Journal Bytes Pending (in memory) report only shows information during active replication.
What This Report Tells You
The Replication Data Journal I/O report answers these questions:
• How many bytes are pending in memory during active replication for the specified LUN?
• How many bytes are pending on disk in the journal for the specified LUN?
• Is there an excessive amount of data pending to be replicated to the secondary data center?
To view the Replication Journal I/O report
1. Choose Reports > Storage: Replication Journal I/O to display the Replication Journal I/O page.
2. Customize the report using the controls described in this table.
Control | Description |
LUN | Select the LUN whose statistics you want to see from the drop-down list. |
Period settings | Click 5m (last five minutes), 1h (last hour), 1d (last day), 1w (last week), or All (last month). For a custom time period, specify the start and end times in the fields immediately below these settings. Use the following format: yyyy/mm/dd hh:mm:ss. You can also use the adjustable slider at the bottom of the graph. |
Report type | Toggle the reports to be displayed by clicking the type heading. The types of reports available depends on the type of report you selected above. |
About Report Graphs
In bar-graph and line-graph reports, the x-axis (or tick mark) plots time, according to the interval you select. The y-axis plots the metric of interest, such as gigabytes of bandwidth, percent of data reduction, connection counts, and so on.
The right margin of the graph points to the value on the y-axis (for example, the percent) that is the average value for the time period selected.