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Adding HTTP Access to a Share (BUI)
Incremental Replica Backups
Continuing (incrementing) a backup series across a replication reversal or sever is not
supported; instead, start a new backup series. Use a full (Level-0) backup for the first backup
after a replication state change has occurred, such as on a new source after a reversal or sever
has taken place.
Static snapshot extensions that do not change per level are NOT supported for user-generated
replica snapshots (snapshots not starting with .rr). This prevents name collisions, which
generate an error and can cause replication to fail.
Some DMAs do not support zfs-type replica incremental backup and restore operations for
snapshot extension name changes per level. To conserve appliance space and ensure that such
snapshots are not preserved for future incremental backups, set UPDATE=n at the time of backup
of replica. User-generated snapshots can be removed manually.
Even if no user data has changed in a restored dataset, changed metadata can cause incremental
replica restores to fail. To avoid this, always roll back to the base snapshot before incremental
replica restores by setting the ZFS rollback before restore parameter to Always.
For non-incremental replica backups, such as for one-off backups, set UPDATE=n so future
snapshots are not saved and consume space. Some older replica snapshots preserved for future
incremental backups, such as those created by setting UPDATE=y, may no longer be needed and
waste space. These snapshots are safe to manually destroy. Snapshots needed by the replication
subsystem cannot be deleted. Unneeded snapshots can be deleted after confirming the warning
message about possible impacts to ongoing or future NDMP backups if the snapshot is deleted.
NDMP Properties and Logs
The NDMP service configuration consists of the following properties and logs:
TABLE 65
Property
Version
TCP port (v4 only)
Ignore metadata-only changes
Target restore pool(s)
274
Oracle ZFS Storage Appliance Administration Guide, Release OS8.6.x • September 2016
NDMP Properties
Description
The version of NDMP that your DMA supports.
The NDMP default connection port is 10000. NDMPv3
always uses this port. NDMPv4 allows a different port if
needed.
Directs the system to backup only files in which content
has changed, ignoring files for which only metadata,
such as permissions or ownership, has changed. This
option only applies to incremental "tar" and "dump"
backups and is disabled by default.
When you perform a full restore using "tar" or "dump",
the system re-creates datasets if there is no share
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