Ozone recon heatmap

This feature helps the administrator with a capability in Ozone Recon UI to read or view the most accessed volumes, buckets, and top 100 keys across Apache Ozone.

To enable or disable the Heatmap feature, set the ozone.recon.heatmap.enable parameter to true or false respectively. By default, the ozone.recon.heatmap.enable parameter is set to true.

The size of each block is based on the size of the file file and color is based on the access count of the file. The Most frequently accessed files are shown in dark red shade as they are the most heated and this shade gets lighter as the access count decreases.

There are three entityTypes present: Volume, Bucket, and Key. You can select any entityType. The default entity type is Key and the default duration is 24 hours. The default value represents the heatmap on read access metadata of the Ozone keys for the last 24 hours.

Volume

Heatmap at volume level is displayed.

Bucket

Heatmap at bucket level is displayed.

If you use Legacy buckets, you can view the buckets for heatmap representation of keys.

If you use FSO buckets, you can view the buckets for heatmap representation of directories/sub-directories and files.

Key

Heatmap at key level is displayed.

Time

Viewing the volume, bucket, or key based on a timeline.

Heatmap representation is available based on the last 24 hours, 7 Days, and 90 Days read access metadata or based on read access metadata for any custom date < 90 days. The default value is 24 hours.

When you select Key as the entity type and provide a path in the search box, you will see the heatmap representation at the specified path level. This means the application builds a heatmap based on the top 100 keys (most accessed or most heated keys) for the path provided. The path can contain numbers, letters, and forward slash.

The default value in the Path search box is /.

When you hover over an entity in the heatmap, a tooltip is displayed. Entity information like Access count, file name and Max Access Count is displayed.