Data protection includes:
Both are configured, scheduled and enabled using the same workflow.
A snapshot is a reference point that preserves the exact folder structure and data content of a data path at a point in time. Snapshots serve as a virtual copy of the data you had at previous points in time and enable you to restore files or directories after deletion or modification.
You can take a snapshot of any directory at any time and you can create snapshot policies to schedule periodic snapshots of specified directories.
How are snapshots accessed?
Snapshots can be viewed in a hidden read-only directory called .snapshot, which is visible under the directory of which the snapshot is taken.
For example: A snapshot of the path /a/b is created. The snapshot is named MySnapshot_b. The snapshot is visible as a directory called MySnapshot_b under /a/b/.snapshot. The content of /a/b/.snapshot/MySnapshot_b is identical to the content of /a/b at the time of snapshot creation.
How much capacity do snapshots consume?
Snapshots consume space when they hold on to storage that would have otherwise been released. This can happen when files are deleted or existing blocks are overwritten with new data. In these cases, the snapshot holds onto the original data.
The Auxiliary used physical capacity value, which you can view on the Capacity card in the Dashboard, closely indicates how much capacity is currently being used by snapshots.
Auxiliary used is the amount of physical SSD space in use by (a) snapshots and (b) any data that may be pending deletion at the current time. This figure usually gives a close indication of snapshot capacity usage. However, at times when a large amount of data was recently deleted, wiping that data from physical storage may taken some time and temporarily enlarge this figure.
How can I limit the capacity consumed by snapshots?
Since snapshots only indirectly consume storage (by holding onto storage that would otherwise be released), you cannot directly control the storage consumed by snapshots. However, you can effectively limit the amount of storage consumed when you set up a snapshot policy for each data path; you choose how frequently a new snapshot is taken and how many snapshots to retain for that path.
When you take a snapshot of a nested directory, the entire file system data is preserved in the snapshot. Capacity consumption of a snapshot therefore depends on the delta of the entire file system data between the live data and the data at the time of taking the snapshot.
Do snapshots consume quota?
No. Snapshots do not consume quota.
Do snapshots include previous snapshots of nested directories?
No. When you take a snapshot of a directory, pre-existing snapshots of subdirectories are not included in the data preserved by the snapshot.
Who has permission to create and manage snapshots?
Snapshots are part of the logical realm. Managers with permission for the logical realm can manage snapshots. Managers who have object-level permission to access a specific export can also manage snapshots for that export.
How do you revert, clone or restore files and directories from snapshots?
You can restore files and directories via NFS or SMB clients. Currently, the snapshots feature does not support reverting or cloning.
Can I prevent a snapshot from being deleted?
Yes, you can lock a snapshot and then it won't be deleted unless and until you unlock it.
How many snapshots can we maintain at one time?
The maximum number of snapshots maintained at any time is 1000. New snapshots cannot be created to exceed this maximum until and unless an old snapshot is deleted, whether manually or due to expiration.
Backup to S3 is a low cost method of backing up the data on your VAST Cluster. Backup to S3 enables you to replicate a VAST Cluster's data to an AWS S3 bucket or to any custom destination that supports S3 access. You can restore the replicated data from a VAST Cluster to the same VAST Cluster or to a different VAST Cluster.
Data can be replicated from a VAST Cluster to only one S3 bucket (S3 replication peer) at any given time. The replication is done by means of a protected path. One protected path with remote S3 backup is supported at one time. Additional protected paths can be configured for local snapshots only.
The VAST Cluster's entire file system is replicated. There is no way to limit S3 replication to a specific data set.
If you delete a protected path and then create another protected path later to resume replicating to the same S3 bucket, a new initial sync is performed, copying all data to the peer, rather than copying only new data that was not already copied to the bucket. (You can, however, pause and resume the protected path.)
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