Question about replication

[enemy85]

Hi all, just 2 "simple" questions to help my clarify some doubts...
My situation: I have 2 freenas boxes, the MAIN ONE always on with snapshots activated (and sometimes replication), and a SECONDARY in a remote place, that i sometimes activate as replication target of the primary box.
Now the questions:
1) On the primary box I found some "expired" snapshots still there...I guess they are still there because taken while was ON the replication task, but they have never been replicated to the secondary box...am I right?
2) Is there a way (or command) to automatically cancel the expired one once replicated, or should i do it manually?

Thank you

 

[toadman]

Hi all, just 2 "simple" questions to help my clarify some doubts...
My situation: I have 2 freenas boxes, the MAIN ONE always on with snapshots activated (and sometimes replication), and a SECONDARY in a remote place, that i sometimes activate as replication target of the primary box.
Now the questions:
1) On the primary box I found some "expired" snapshots still there...I guess they are still there because taken while was ON the replication task, but they have never been replicated to the secondary box...am I right?
2) Is there a way (or command) to automatically cancel the expired one once replicated, or should i do it manually?

Thank you

On (1), I don't know. I would have thought snapshot expiration would cause the primary system to remove the snapshop irrespective of replication. i.e. it's expired, remove it. I would have to go look at the replication code to see what it does. I suspect it looks at the snapshot list on the SOURCE, compares to the snapshot list on the TARGET, and then (a) sends any snapshots on the source that are not on the target and (b) removes any snapshots on the target that are not on the source.

On (2), what do you mean by "cancel"? Delete? I would have thought the system would delete it if expired.

There have been snapshot and replication bugs on some versions of Freenas, not sure if they exist on 11.1-RELEASE.

 

[Chris Moore]

FreeNAS 11.1 RELEASE 64bit

You might need to update to 11.1-U6 as some of this may have been fixed. You can manually delete snapshots from the GUI. Very easy.

 

[Chris Moore]

http://doc.freenas.org/11/storage.html#snapshots

 

[enemy85]

You might need to update to 11.1-U6 as some of this may have been fixed. You can manually delete snapshots from the GUI. Very easy.

Actually primary nas is on 11.1-U6 and secondary on 11.1-4, and i know i can do that, is just a bit tricky to search for the expired ones between all of them

 

[enemy85]

On (1), I don't know. I would have thought snapshot expiration would cause the primary system to remove the snapshop irrespective of replication. i.e. it's expired, remove it. I would have to go look at the replication code to see what it does. I suspect it looks at the snapshot list on the SOURCE, compares to the snapshot list on the TARGET, and then (a) sends any snapshots on the source that are not on the target and (b) removes any snapshots on the target that are not on the source.

On (2), what do you mean by "cancel"? Delete? I would have thought the system would delete it if expired.

There have been snapshot and replication bugs on some versions of Freenas, not sure if they exist on 11.1-RELEASE.

1) my idea was that once expired, they should be cancelled, no matter if replicated or not, but it seems not working like this.
2)yes, i meant delete because as they are still there, even if expired, i know i can delete them manually, but it's just a bit tricky to search for the expired ones between all of them

 

[toadman]

There are some very handy scripts from @fracai here: https://github.com/fracai/zfs-rollup

I still use the roll-up one daily in a cron job to trim (delete) old snapshots.