Dell PowerVault NX3500 Administrator's Guide - Page 99
Managing Snapshots, Snapshots, Creating a Snapshot (Without a Policy)
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Managing Snapshots Snapshots Snapshot technology creates a point in time backup of the data that resides on a volume. There are various policies that can be set for creating a snapshot. These policies include when a snapshot is to be taken, how many snapshots to keep, and how much NAS volume space can be used before snapshots are deleted. Snapshots are based upon a change set. When the first snapshot of a NAS volume is created, all snapshots created after the baseline snapshot is a delta from the previous snapshot. Activating Snapshots Snapshots are a licensed feature. Customers are provided a key to activate snapshots using the CLI. The syntax is as follows: system general licensing set snapshots XXXXXXX Creating a Snapshot (Without a Policy) To create a snapshot: 1 From the NAS Manager, navigate to Data ProtectionSnapshotsList. 2 Create a snapshot by clicking the Create button. 3 Choose the NAS volume from the drop-down menu and give the snapshot a unique name. Adding or Modifying a Snapshot Policy From the NAS Manager, navigate to Data ProtectionSnapshotsPolicies. Add or modify a snapshot policy by selecting the appropriate NAS volume from the dropdown menu. There are several options on this page. • Alert Administrator: Sends an alert to the administrator when the snapshot space reaches a certain percentage of the total volume size. • Periodic/Hourly/Daily/Weekly: These options can be combined to set particular schedules. Creating a snapshot impacts system performance. Each option has a number of snapshots to keep. It is advised to keep this number as low as possible or system performance may suffer. Protecting Data on PowerVault NX3500 99