Qsan XCubeSAN XS5224D, Руководство пользователя

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Data Backup
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12.2.5. Local Clone Notices
While the clone is processing manually, the incremental data of the volume is over the
snapshot space. The clone will complete the task, but the clone snapshot will fail. At the
next time, when trying to start clone, it will get a warning message “There is not enough of
snapshot space for the operation”. The user needs to clean up the snapshot space in order
to use the clone feature. Each time the clone snapshot failed, it means that the system
loses the reference value of incremental data. So it will need to make a full copy the next
time a clone task starts.
12.3. Managing Remote Replications
Remote replication is a block-level, asynchronous, differential remote volume backup
function through LAN or WAN. It has many powerful capabilities such as unlimited
bandwidth, traffic shaping, and multiple connections per replication task.
Figure 12-20 Remote Replication Diagram
Remote replication uses the iSCSI function to set up a replication connection. It can use the
full bandwidth of the assigned network port to allow the best backup speed. However, in
order to balance replication traffic and non-replication traffic, the traffic shaping function
can help to reserve necessary bandwidth for non-replication I/O.
If the replication task requires more bandwidth, Remote replication allows multiple
connections per task by intelligently balancing the backup task across multiple connections
to enhance the bandwidth.
Both manual and scheduled replication tasks are supported for flexible management. To
handle huge data remote replication, Remote replication allows transforming local cloning
task into a remote replication task. You can perform the local clone first for the full copy.
Then use disk roaming function to physically transport the disk drives that contain the