Increasing/Reducing Journal Hard Size Limit – Public Cloud

KB Number:
000002067

Symptoms:
An administrator may want to Increase/Reduce the Journal Hard Size Limit when replicating to a public cloud.
 

Cause:
The Journal hard size limit on public cloud is being allocated due to usage and the journal needs.
The default maximum size a Journal can grow to is 1048576MB.

Solution:

In order to change the maximum size a Journal can grow to, please follow these steps: (The size is an example of 2TB.)
1) Login to the ZCA machine.
2) Stop the ZVM services.
3) Open the tweaks.txt file found in \Program Files\Zerto\Zerto Virtual Replication\.
4) Edit the file so you provide the below tweak on its own line:
t_overrideJournalHardLimitValueInMb=2097152
t_vraSizeOfAwsJournalMB=2097152
t_initialJournalLimitInMB=2097152
5) Save the file.
6) Start the ZVM and VRA services.
7) Restart the Protected VRA 
8) Edit the VPG (no need to make any changes) just run the update VPG task.
Notes:

1. All values should be in MB (Megabytes)
2. The maximum value for the tweak is according to the Microsoft KB maximum of a block blob type.
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blobs-introduction
Currently, Block blobs store text and binary data, up to about 4.7 TB. Block blobs are made up of blocks of data that can be managed individually.


Affected Versions:
All

Hypervisor:
When Replicating to Public Cloud.

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