Replication issues

TrueNAS General
1

I am trying to make a backup copy of my pool to another pool on the same system. I had errors that said there were no snapshots so I did a from scratch replication. Then I unchecked the from scratch box. Now I get this error:

Replication “Pool1 - Pool3/SetA” failed: cannot receive incremental stream: most recent snapshot of Pool3/SetA does not match incremental source.

2024-06-22 00:00:01 (America/Chicago)

Please help me understand how to do this:
I have this setup in the create snapshot menu

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Here is my replication info:
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Here is the error I get from the replication

rror

cannot receive incremental stream: most recent snapshot of Pool3/SetA does not match incremental source.

Logs

[2024/06/22 00:00:01] ERROR [replication_task__task_8] [zettarepl.replication.run] For task ‘task_8’ unhandled replication error ExecException(1, ‘cannot receive incremental stream: most recent snapshot of Pool3/SetA does not\nmatch incremental source\n’) Traceback (most recent call last): File “/usr/local/lib/python3.9/site-packages/zettarepl/replication/run.py”, line 181, in run_replication_tasks

2

I think u should set the recursive flag in the Snapshot task, as almost full filesystem replication in the replication task.
When i had similar problem, i just delete snapshots/ destination dataset and re-run the task

1 Like
3

Replication “pool2,pool2/Vault2 - Pool4/Vault4” failed: No incremental base on dataset ‘pool2/Vault2’ and replication from scratch is not allowed…

2024-06-28 00:29:27 (America/Chicago)

How do I fix this issue.

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4

If you don’t mind replicating from scratch… you can tick the “Replicate from scratch” tick box.

So, the better question is why are there no incremental bases between the source and destination?

This video I made to try to explain setting up tiered snapshots, and how to use them for data recovery might help

1 Like
5

I had so much trouble writing to this pool/dataset that I deleted and re-added the target dataset to clear it out. I thought that starting from scratch would help.
I now did as you suggested and set the “replicate from scratch”. I expected it to take a long time to replicate 7TB, but it was done quickly. The data looked OK on the drive. I cleared the “replicate from scratch”, then re-ran the replication task and received the same error. I am confused. I once again set the “replicate from scratch”. To check what was happening I added a directory containing a text file in the source dataset. I then re-ran the replicate task. During the replication I could see the snapshot on the right side of the status screen cycle through the snapshots including the current date. I checked the destination dataset for the updated directory/file and it was not there. Again I am confused.
Please help me understand this I am just trying to make a backup of one pool to another location.

6

It’s like @oxyde commented. You’re not matching the Replication Task with a recursive snapshot.

I think you’re also confusing “pool”, “drive”, “dataset”, and “snapshot”.

You likely saved the file to a location within a child dataset, which is not part of the replication task’s snapshot hierarchy.

7

I think you’re also confusing “pool”, “drive”, “dataset”, and “snapshot”.

You likely saved the file to a location within a child dataset, which is not part of the replication task’s snapshot hierarchy.
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I reviewed the snapshot task based on your info. I have several sub-directories in the dataset. I did not have “recursive” set and the data I want to backup is in one of the sub-directories.
After I set the snapshot to recursive and ran the replication, the new file data was updated in the Windows share (drive) that I was trying to make a copy of. I had the replication from scratch set in that replication task. It took a few minutes but it was not long enough for it to be a “complete from scratch” copy of 7TB. I am confused about why all the files were not moved to the target dataset. (it was like only the changes were updated) all the data is there.
I turned off “complete from scratch” and re-ran the replication task. I get an error that “No incremental base on dataset ‘pool2/Vault2’ and replication from scratch is not allowed.” Do I get this because the snapshot has not had a chance to update? If I waited until the next cycle but I still get the error?

I aim to periodically make a copy of the Windows shares on my Truenas server to a Truenas remote server that I do not always keep on. I just want to wake it up, run the replication, and once it is done, turn the machine off.

when I look at the snapshot storage I see "pool2/Vault2<> where <> is all of the subdirectories in my dataset except my mail storage area.
directories in the dataset are:

  • iocage and all it sub-directores
  • win10
    But the subdirectory bob is not listed in the snapshots?
    The directory bob did get updated. So I am puzzled.
    Please bring some clarity to this.