Snapshot Configuration
- Snapshots Enabled
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- Hide .snapshot Directories
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- Snapshot Reserve
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- Weekly, Nightly, and Hourly Snapshots
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- Hourly Snapshot Schedule
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Snapshots Enabled
Enables or disables snapshots. A snapshot is a read-only copy of the entire file system--it reflects the state of the file system at the time the snapshot was created. Any client of a filer can access snapshots to recover old versions of files (for example, files that have been accidentally changed or deleted). The snapshot feature allows users to restore their own files without system administrator intervention, because files in snapshots can be viewed and copied by those who have permission to do so with the original files.
Hide .snapshot Directories
Makes the .snapshot directory that is normally present at client mount points or the root of the CIFS share invisible. It also turns off access to the .snapshot directory and all .snapshot directories under the mount point or the root of the CIFS share. By default, this option is disabled.
- NOTE: The dump command does not work properly if the nosnapdir option is on.
Snapshot Reserve
Specifies the amount of disk space that the snapshots can use. The snapshot reserve can be used only by snapshots, not by the active file system.
Weekly, Nightly, and Hourly Snapshots
Specifies the number of weekly, nightly, and hourly snapshots to keep.
If users rarely lose files or typically notice lost files right away, use the default snapshot schedule.
If users commonly lose files and need to restore them, Network Appliance recommends that you delete the snapshots less often than specified by the default schedule. For file systems that change very quickly, reduce the number of snapshots scheduled. For example, if the entire file system on a filer is filled and emptied each day (for example, a file system storing large temporary files for a CAD application), it might not make sense to use daily or weekly snapshots at all. On a very active system, Network Appliance recommends that you schedule snapshots every hour and keep them for just a few hours.
Hourly Snapshot Schedule
Specifies the time at which the hourly snapshots are taken. If no times are specified, the snapshots are taken at each hour.
NetApp Filer Configuration Help - 28 AUG 1997