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Oracle

1Z0-820 · Question #67

The current ZFS configuration on server is: You need to backup the /data file system while the file system is active. Select the option that creates a full backup of the /data file system and stores…

The correct answer is C. Zfs send pool1/data@Monday | ssh system zfs recv backup/monday. zfs send pool1/data@Monday streams the snapshot data to stdout, and piping it through SSH to zfs recv backup/monday on the remote system writes that stream into the backup pool - this is exactly the ZFS native backup workflow for live, active filesystems. Why the distractors…

Managing Data Storage

Question

The current ZFS configuration on server is:

You need to backup the /data file system while the file system is active. Select the option that creates a full backup of the /data file system and stores the backup on server in the pool named backup.

Exhibit

1Z0-820 question #67 exhibit

Options

  • AMount -F nfs system: /backup / mnt
  • BMount -F nfs systemB: /backup/mnt
  • CZfs send pool1/data@Monday | ssh system zfs recv backup/monday
  • DZfs snapshot pool1/data@Monday | ssh system zfs recv backup/monday

How the community answered

(27 responses)
  • A
    7% (2)
  • B
    15% (4)
  • C
    74% (20)
  • D
    4% (1)

Explanation

zfs send pool1/data@Monday streams the snapshot data to stdout, and piping it through SSH to zfs recv backup/monday on the remote system writes that stream into the backup pool - this is exactly the ZFS native backup workflow for live, active filesystems.

Why the distractors fail:

  • A & B use mount -F nfs, which mounts a remote NFS share as a local directory - that grants access to storage, not a backup of /data. Neither creates a copy of the data.
  • D uses zfs snapshot, which only creates a local point-in-time snapshot and produces no stdout stream. You cannot pipe zfs snapshot output into zfs recv - there is nothing to receive.

Memory tip: Think "SEND streams, SNAPSHOT stays." zfs snapshot freezes data locally; zfs send is what actually moves that data across the wire. For remote backups, the pattern is always zfs send ... | ssh <host> zfs recv ....

Topics

#ZFS send/recv#snapshot replication#remote backup#active filesystem backup

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