Gen8 Runner
Contributor
- Joined
- Aug 5, 2015
- Messages
- 103
Hey there,
like in another thread mentioned, I just setup a second "FreeNAS" machine (so, one is TrueNAS, the other FreeNAS). I am using the TrueNAS machine as backup-server for my FreeNAS machine, what is done by Replication.
But there is one big question-mark in my head, which I don't understand yet. So, let me give you example:
- Today, at 12am i make a Replication-task of a dataset with 10TB, that snapshot has a lifetime of one year
- FreeNAS sends the snapshot of 10TB size to my TrueNAS machine
- Now i add every week 10GB of data to my dataset (-> 520GB in one year)
- Those 520GB are sent by monthly snapshots to the TrueNAS machine
- On 03.09.2021 12am the lifetime of my 10TB snapshot is reached and TrueNAS is destroying the snapshot
- Now only the 520GB of added data still exist on the TrueNAS Backup-machine and the 10TB data of the initial-snapshot are gone
Is this the way it works or do the 10TB still exist on the pool?
I could imagine, that the 10TB of data are not destroyed (because FreeNAS / TrueNAS is so crazy reliable), but that would be a discrepancy about the snapshot lifetime.
Who can resolve that miracle? What is the technical background and what exactly is happening to the data after the lifetime of the snapshot is reached? Because, as far as i know, the following snapshots ONLY include changed datablocks.
Thanks in advance!
like in another thread mentioned, I just setup a second "FreeNAS" machine (so, one is TrueNAS, the other FreeNAS). I am using the TrueNAS machine as backup-server for my FreeNAS machine, what is done by Replication.
But there is one big question-mark in my head, which I don't understand yet. So, let me give you example:
- Today, at 12am i make a Replication-task of a dataset with 10TB, that snapshot has a lifetime of one year
- FreeNAS sends the snapshot of 10TB size to my TrueNAS machine
- Now i add every week 10GB of data to my dataset (-> 520GB in one year)
- Those 520GB are sent by monthly snapshots to the TrueNAS machine
- On 03.09.2021 12am the lifetime of my 10TB snapshot is reached and TrueNAS is destroying the snapshot
- Now only the 520GB of added data still exist on the TrueNAS Backup-machine and the 10TB data of the initial-snapshot are gone
Is this the way it works or do the 10TB still exist on the pool?
I could imagine, that the 10TB of data are not destroyed (because FreeNAS / TrueNAS is so crazy reliable), but that would be a discrepancy about the snapshot lifetime.
Who can resolve that miracle? What is the technical background and what exactly is happening to the data after the lifetime of the snapshot is reached? Because, as far as i know, the following snapshots ONLY include changed datablocks.
Thanks in advance!