Data Backup
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Automatic Snapshot Space Allocation Ratio:
This setting is the ratio of the source
volume and snapshot space. If the ratio is set to 2, when there is no snapshot space
assigned for the volume, the system will automatically reserve a free pool space to set
as the snapshot space with twice capacity of the volume. The options are 0.5 ~ 3.
Automatic Snapshot Checkpoint Threshold:
The setting will be effective after enabling
schedule replication. The threshold will monitor the usage amount of the snapshot
space. When the used snapshot space achieves the threshold, system will take a
snapshot and start replication process automatically. The purpose of threshold could
prevent the incremental copy failure immediately when running out of the snapshot
space. For example, the default threshold is 50%. The system will check the snapshot
space every hour. When the snapshot space is used over 50%, the system will start
replication task automatically. And then continue monitoring the snapshot space. When
the rest snapshot space has been used 50%, in other words, the total snapshot space
has been used 75%, the system will start replication task again.
Restart the task an hour later if failed:
The setting will be effective after enabling
schedule replication. When running out of snapshot space, the volume replication
process will be stopped because there is no more available snapshot space. If this
option is checked, the system will clear the snapshots of replication in order to release
snapshot space automatically, and the replication task will be restarted after an hour.
This task will start a full copy.
CAUTION:
The default snapshot space allocated by the system is two times the
capacity of source volume. That is the best value of our suggestion. If
user sets snapshot space by manually and lower than the default value,
user should take the risk if the snapshot space is not enough and the
replication task will fail.
12.3.7.
Configure MPIO in Remote Replication Task
In remote replication scenario, MPIO (Multi-Path I/O) are support for redundancy. Normally,
the remote replication task is running on the master controller (usually is controller 1) of
source unit. The data is replicated from the master controller of source unit to the controller
of target unit which target IP Address sets in creating remote replication task (usually is
also controller 1). The second path from source unit can be added to the controller 2 of
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