The Zerto Virtual Manager User Interface : Advanced Journal Settings Dialog
  
Advanced Journal Settings Dialog
Manage the journal used for recovery.
Journal History – The time that all write commands are saved in the journal. The longer the information is saved, the more space is required for each journal in the VPG to store the saved information. You can select the number of hours from 1 to 23 or the number of days from 1 to 30.
Default Journal Datastore – The datastore used for the journal data for each virtual machine in the VPG. Select a datastore accessible to the host. When you select a specific journal datastore, the journals for each virtual machine in the VPG are stored in this datastore, regardless of where the recovery datastores are for each virtual machine. In this case, all protected virtual machines must be recovered to the hosts that can access the specified journal datastore.
Journal Size Hard Limit – The maximum size that the journal can grow, either as a percentage or a fixed amount. The minimum journal size, set by Zerto Virtual Replication, is 8GB. The journal is always thin-provisioned.
Unlimited – The size of the journal is unlimited and it can grow to the size of the recovery datastore.
Size (GB) – The maximum journal size in GB.
Percentage – The percentage of the virtual machine volume size the journal can grow to.
If unlimited is chosen, the Size and Percentage options are not displayed.
Journal Size Warning Threshold – The size of the journal that triggers a warning that the journal is nearing its hard limit.
Unlimited – The size of the journal is unlimited and it can grow to the size of the recovery datastore.
Size (GB) – The size in GB that will generate a warning.
Percentage – The percentage of the virtual machine volume size that will generate a warning.
If unlimited is chosen, the Size and Percentage options are not displayed.
Both the value of Size and Percentage must be less than the configured hard limit so that the warning will be generated when needed. In addition to the warning threshold, Zerto Virtual Replication will issue a message when the free space available for the journal is almost full.