- Metadata Operations chart

# Metadata Operations chart

Contents

This chart is shown for file systems and for specific MDTs. The chart shows the number of metadata I/O operations over time, based on command type. These are system calls or commands performed on all file systems. You can also view this chart for a single file system or MDT.

## Features

• | Click Full Screen to fill the browser window with this chart. Click Exit Full Screen to return to the normal view.

• | Mouse over any point on the chart to learn the values for each system call or command type executing at that time. Values shown vary, based on the chart type: For Stacked and Stream display, values are absolute. For Expanded display, values are relative percentages.

• | Click on any area in the chart to display only information for that specific system call or command type. The vertical scale will adjust to better display that information.

• | Click the command icons (e.g. close, getattr, etc.) to display or not display those command types on the chart.

• | Click Stacked to show all displayed command types stacked, with the command types stacked alphabetically.

• | Click Stream to display a "stream-graph" of the relative volume of each type of metadata operation. The display of each command-type (or layer) out from the horizontal center-line is ordered, from the least-varying volume to most-varying volume, per command type, over time.

• | Click Expanded to show the percentage of each command type versus 100%.

## View this chart for a specific file system

This chart is displayed by default for all file systems. To view this chart for a single file system:

1. | On the Dashboard, click Configure Dashboard.

2. | Select File System (default).

3. | At the File System drop-down menu, select the file system. Then click Update.

## View this chart for a specific MDT

To view this chart for a single MDT:

1. | On the Dashboard, click Configure Dashboard.

2. | Select Server.

3. | At the Server drop-down menu, select the server hosting the desired target.

4. | At the Target drop-down menu, select the desired MDT. Then click Update.

## Configure the Metadata Operations chart

1. | Click Configure.

2. | Click Set Duration and enter at time period over which samples will be taken. Enter Minutes (1-60), Hours (1-24), Days (1- 31), or Weeks (1-4). Note that for long durations, the chart will be divided over several days, with samples periods starting at different times of the day. The value given is an average for that sample period.

3. | Click Set Range to set the Start and End times and dates over which measurements will be displayed. This view of the chart is a static snapshot, starting and ending as configured.

4. | Click Update to apply and close this window.