Use the Create Child snapshot operation to create a point-in-time copy of an existing Oracle ACFS snapshot. Future changes to the parent snapshot are not inherited by the child snapshot. To create a child snapshot of an existing snapshot, follow these steps:
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From the Oracle ASM home page, select the ASM Cluster File System tab to display the mount points in the cluster file system.
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Click the file or directory Mount Point in which you want to create a child snapshot.
Enterprise Manager displays ASM Cluster File System page.
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Click the Snapshots tab.
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Select the parent snapshot you want to use to create a child snapshot, then click Create Child.
The Create Child Snapshot on ASM Cluster File System page displays.
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The Snapshot Name field is automatically populated with a default child snapshot name. You can replace the name with a name you designate.
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Set the Attribute to Read Only or Read Write.
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Optionally you can turn on the option to delete the oldest snapshot by turning on the delete option. Oracle Enterprise Manager tabulates the number of remaining snapshots before the maximum limit is reached.
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Click OK to create the child snapshot.
Oracle Enterprise Manager returns to the Snapshots tab where you can see the new snapshot with its Parent Name listed in the table.