American Megatrends StorTrends 1300 User Manual page 293

As shown above, select a Storage Pool and select a list of volume from that storage pool,
for which Journaling is preferred. Enter Journal File Capacity by the unit of GB.
On successful creation of Journal File, a node will be created under the Journal. Select
the node to mange this Journal File.
Journaling (logging IO), happens only after a snapshot is created for the CG. Any IO
happened between two snapshot will be logged into Journal with one leading snap event
and one trailing snap event. Thus any IO logged in Journal is easily identified by
associating with a base snapshot.
Refer 'Snapshot Schedule' section to configure snapshot interval and other advance
parameter.
Using Journal File, both CDP and Journal Assisted Replication (JAR) can be performed.
This document further explains about JAR.
CLI: A Journal File can be created using ITX 2.7 CLI interface.
For example: cli create -t journal –f journalfile0 –c StoragePool1 –v privol0 –v privol1 –z
10 -j journal0 journal
Where, –f option is for Journal File name, -c option is for container name, -v option is for
volume name and –j option is for Journal name. –v option can be repeated for as many
volumes for a Journal File. –z option is used to specify Journal File Size.
Appendix E : Replication Overview 275