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Dell PowerVault ME4 Series Storage System CLI Guide

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set snapshot-space


Description	Sets the snapshot space usage as a percentage of the pool and thresholds for notification. You can set the percent of the pool that can be used for snapshots (the snapshot space). NOTE:If the percentage of the pool used by snapshots is higher than the percentage specified in this command, the command will fail. You can specify a limit policy to enact when the snapshot space reaches the percentage. You can set the policy to either notify you via the event log that the percentage has been reached (in which case the system continues to take snapshots, using the general pool space), or to notify you and trigger automatic deletion of snapshots. If automatic deletion is triggered, snapshots are deleted according to their configured retention priority. Snapshots that are mapped or are not leaves of a volume's snapshot tree are not eligible for automatic deletion. The system generates events when the percentage of snapshot space used crosses low, middle, or high thresholds. The event is generated when the percentage exceeds or drops below the threshold. You can set the percentages for the thresholds.
Minimum role	manage
Syntax	set snapshot-space [high-threshold `percent-of-snap-space`%] [limit `percent-of-pool`%] [limit-policy notify-only\|delete] [low-threshold `percent-of-snap-space`%] [middle-threshold `percent-of-snap-space`%] pool A\|B
Parameters	[high-threshold `percent-of-snap-space`%] Optional. Specifies a percentage of the snapshot space for the high threshold. Enter a value from 1% to 100%. It must be greater than or equal to the middle threshold. The default is 99%. When this threshold is exceeded, event 571 is logged with Warning severity. [limit `percent-of-pool`%] Optional. Specifies the snapshot space. Enter a value from 1% to 100%. The default is 10%. [limit-policy notify-only\|delete] Optional. Specifies the limit policy for when the percentage of the pool designated for snapshots is reached. notify-only: When the snapshot space is reached an event is generated and logged. This is the default. delete: When the snapshot space is reached an event is generated and logged and automatic deletion of snapshots occurs. [low-threshold `percent-of-snap-space`%] Optional. Specifies a percentage of the snapshot space for the low threshold. Enter a value from 1% to 100%. The default is 75%. When this threshold is exceeded, event 571 is logged with Informational severity. [middle-threshold `percent-of-snap-space`%] Optional. Specifies a percentage of the snapshot space for the middle threshold. Enter a value from 1% to 100%. It must be greater than or equal to the low threshold. The default is 90%. When this threshold is exceeded, event 571 is logged with Informational severity . pool A\|B The pool for which to create the snapshot space usage.
Examples	For pool A, limit the maximum amount of pool space that can be occupied by snapshot data to 15%, set the middle-threshold warning event to be logged when 85% of that space has filled, and set a policy to automatically delete snapshots (per deletion rules) when the 15% limit is reached. # set snapshot-space pool A limit 15% middle-threshold 85% limit-policy delete
See also	show snapshot-space show pools