You can find Capacity Estimations under the Analytics in the left navigation menu.
Tip
You can search for this page or any other by clicking the search button (
) at the top left of the page or pressing '/' on your keyboard.
The Capacity Estimations page displays a chart showing how capacity usage is distributed among the larger subfolders of a selected Element Store path:
Note
The chart shows up to 1000 folders in total, at three levels.
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The folder for which current estimations are being reported is displayed in the top-left corner. Navigate to a higher level directory by clicking on its link in the displayed path.
When you first open the Capacity Estimations page, the selected path points to the root directory of the Element Store.
The circle in the center of the chart represents 100% of the storage usage for all data stored in the selected directory. It displays the amount of capacity used by data stored under the path.
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The closest ring to the center represents the distribution of that usage among the direct subfolders of the selected directory. Each folder has its own color.
Click a subfolder to drill down to that subfolder's path.
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The outer ring shows how data is distributed inside each subfolder. Subfolders of subfolders are shown in the same color as their parent folder.
Click a folder to drill down to that folder's path.
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A blank sector represents the composite proportional allocation of:
Files
Folders under 5 GB in size.
Folders that don't appear due to the limit on the total number of folders that can be shown (1000).
On the right of the page, you can see more details about the usage distribution among the larger subfolders of the selected path:
The selected path.
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This section shows these estimated metrics for the selected path or for a subdirectory on the chart when you hover over that subdirectory:
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Data reduction. The data reduction ratio in effect for the data under the selected path (or the subdirectory that you are hovering over).
Data reduction reduces the amount of usable capacity consumed by data. The result of data reduction is an increase in the effective capacity available for the data. VAST uses three techniques for data reduction: global compression, global deduplication, and global similarity compression.
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Usable: The amount of usable capacity that is consumed by the directory. The higher the data reduction ratio, the lower this value is relative to the amount of data that is logically written.
Note
The total usable capacity of the cluster varies with cluster size and is in the region of 81-88% of the total raw drive capacity of the cluster, with some capacity reserved for background activities and a varying data protection overhead.
Unique: The amount of usable capacity that could be reclaimed by deleting the directory.
Logical. The amount of data logically written to the directory prior to data reduction.
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This indicator shows which usage metric is currently shown in the chart and as Usage in the details in the grid below. The type can be usable, unique or logical capacity.
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The following information is displayed for the selected path and it's composite subfolders:
Directory
The directory name
Usage
The amount of capacity attributed to the directory, in terms of the selected index.
%
The percentage of the usage of the selected path that is used by the directory.
Average Atime
A weighted average value calculated from the atime values of the files in the directory, with weighting based on file size. atime is a file attribute that tells you when a file was last accessed.
Toggle Show/Hide small folders to show or hide all of the folders that are less than 5 GB in size.
You can:
Drill down: Click a subfolder to drill down to the subfolder's path. The subfolder path becomes the selected path.
Jump to a path: Enter any Element Store path in the Jump to path field to select that path or click a directory name in the breadcrumbs to jump up to a parent directory.
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Change which usage metric is currently shown in the chart and in the detailed grid. Select one of the following from the Select type dropdown:
Click Copy Path to copy the current selected path to the clipboard.
Hover over any subfolder in the chart to see the estimated usage and DRR for the subfolder.
Click the Refresh data button to refresh the data shown.
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