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PowerScale OneFS 9.8.0.0 CloudPools Administration Guide

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CloudPools, snapshots, and SnapRevert

The SnapshotIQ, SyncIQ, FSAnalyze, and NDMP Backup functions create point-in-time snapshots of directories in OneFS. Even as files are modified, the snapshot versions are maintained. As part of file matching, CloudPools can include files that have snapshot versions.

CloudPools archives the latest versions of those files to the cloud, and creates local SmartLink files in place of the archived files.

The default CloudPools setting is to allow files with snapshot versions to be archived, but you can change the default setting.

CloudPools also supports SnapRevert for SmartLink files. For example, suppose that CloudPools archived a directory named /ifs/data/images to the cloud. The files in the images directory would be replaced with SmartLink files.

If you create a SnapRevert domain for the directory, and run the SnapRevert job, the CloudPools archival process is reversed, and the original files are restored to the directory. CloudPools removes any cloud data that was created as part of the original archive process.

In OneFS 8.2 and later, files in SnapRevert (and WORM) domains cannot be SmartLinked. Do not configure a SnapRevert domain in a path that is being archived. Make sure your archive policies do not include SnapRevert directories. Archive jobs that include SnapRevert paths do not complete.
NOTE:If you upgrade to OneFS 8.2.x or later from a release earlier than 8.2.X, SnapRevert domains still work the same for already archived files. However, you must not have SnapRevert domains in paths that are being newly archived. Before starting an archive job, manually remove SnapRevert domains (if any exist) from the cloud pool policies in the job. Otherwise, the archive job stalls.

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