Viewing the NAS Bridge dashboard

The NAS Bridge dashboard displays pre-configured graphs showing system metrics.

About this task

The NAS Bridge dashboard includes standard graphs for the following:
  • Cache Usage
  • Intent Log Size
  • Disk Rate
  • Network Rate
  • CPU Load
  • Memory
  • Object Store Latency
You can view the information on the dashboard to quickly assess the current state of the NAS Bridge node.
The standard NAS Bridge dashboard is read-only and cannot be modified.
Attention: If you make changes to the standard dashboard, you must use Save as to save your changes.
Graph Description

Cache Usage

Shows cache usage for each cache device over the specified time frame (the default is "Today so far"). Use the Cache Device drop-down list to select which cache device is shown.

The Cache Usage graph includes two lines, as follows:
  • The Cache line shows the usage of the main cache. The main cache offers superior performance and consumes 80% of the available space on the cache device. The main cache is used for all new files that are written to nodes running NAS Bridge 2.0.2 (or higher).
  • The Legacy Cache line shows the usage of the legacy cache. The legacy cache consumes 20% of the available space on the cache device. The Legacy Cache is used for file and directory metadata and for queuing metadata after it is committed to the StorageGRID Webscale system.

Intent Log Size

Shows the Intent Log Size for each file system over the specified time frame (the default is "Today so far"). The Intent Log Size represents the degree to which the files in the cache have been "cleaned" (that is, persisted to the StorageGRID Webscale system). A non-zero value means that there are still operations in the queue to commit "dirty" files that have not been persisted to the StorageGRID Webscale system. A zero value means that all objects in the cache have been persisted. Use the File System drop-down list to select which file system is shown.

Disk Rate

Shows the number of bytes of data that were read and written per second by each disk in the system over the specified time frame (default is "Today so far").

Network Rate

Shows the data rate between the network and the node over the specified time frame (default is "Today so far"). Also includes tables showing the minimum, maximum, and average rates for received and transmitted data.

CPU Load

Shows the CPU load over the specified time frame (default is "Today so far"). This chart includes three lines that show the average load for 1-minute, 5-minute, and 10-minute intervals.

Memory

Shows RAM usage for the node in gibibytes (GiB) over the specified time frame (default is "Today so far").
  • The Total line shows the total amount of RAM available and does not change.
  • The Used line shows how much RAM is currently being used.

Object Store Latency

The communication time from the NAS Bridge to its configured StorageGRID Webscale grid and back. If this value is higher than a few milliseconds or fluctuates significantly, check your network setup.

Steps

  1. Click Dashboard at the top of the web page.
  2. Review the information in the graphs.
    To... Do this...
    Determine the value of the data at an exact moment in time Move the cursor over the graph.
    Increase the amount of time shown Click Zoom Out or press Ctrl+Z.
    Shift the time backward Click < or press the left arrow key.
    Shift the time forward Click > or press the right arrow key.
    Specify a different time range for the graph Click the clock icon icon and select or enter the range. The default setting is Today so far.
    Refresh the data Click the refresh icon icon.
    Set an auto-refresh rate Click the clock icon, select how frequently you want the data to be refreshed, and click Apply. The default refresh rate is one minute.
  3. Hide and show specific lines of data.
    To... Do this...
    Hide a line from the graph Click the legend for the line you want to show.
    Show a previously hidden line Click the legend for the hidden line.