Destroy jail datasets

[Tom7320]

Hi there!

Recently I upgraded from 9.1 to 9.2 without problems. I played around a lot with jails, created them, deleted them etc.... I ended up with many datasets under my Jails dir, even though I already deleted the jails.

My question is: what datasets can I delete safely without compromising still existing jails? I don't trust me to mess around with that since I still have a couple of jails I still need...

One more question: I have automatically created ZFS jail snapshots . What is the meaning of that snapshots. Can I also delete these snapshots?

THX!

 

[cyberjock]

Those snapshots are for future jails you may create. Do not delete it.

 

[HolyK]

You can delete the obsolete datasets and also the snapshots if you are sure that you will not need them anymore.

To be honest i don't like the way how it is named ... "jails/.warden-template-9.1-RELEASE-amd64-pluginjail" , "jails/.warden-template-9.1-RELEASE-amd64" ... maybe some shorter and unique name could be better and THEN store additional info (version, architecture, type) as an file inside the jail. Anyway this is just a cosmetic thing and i can live with that ^^

 

[Tom7320]

Hi there!

Thanks a lot for your answers! Still I'd like to _understand_ how it works, what for are the datasets, snapshots and what happens if I delete them... Is there any kind of documentation that goes beyond the User Manual?!? How can I be sure that I won't need them anymore?

THX!

Regards,

Tom

 

[cyberjock]

The snapshots created automatically by FreeNAS(Not ones you do manually or per your schedule) need to stay there. They do alot of the jail file administration. In particular I believe those snapshots allow you to have 1 copy of the files while having multiple jails that don't have to have copies of the whole jail. It's like 1 copy deduped to all the jails, but without the DDT tables.

 

[Tom7320]

Thx for your answer! I still don't fully understand the way it works but i'll keep looking for documentation... ;-)

 

[kraab]

You can delete the obsolete datasets and also the snapshots if you are sure that you will not need them anymore.

To be honest i don't like the way how it is named ... "jails/.warden-template-9.1-RELEASE-amd64-pluginjail" , "jails/.warden-template-9.1-RELEASE-amd64" ... maybe some shorter and unique name could be better and THEN store additional info (version, architecture, type) as an file inside the jail. Anyway this is just a cosmetic thing and i can live with that ^^

Not sure this is so true, I have just removed an old jail dataset and it nuked my new jail dataset..

To be clear I had set \mnt\SSD\Jails originally but after a complete reinstall I had configured to \mnt\SSD\Jails_2. After removal of \mnt\SSD\Jails folder everything inside \mnt\SSD\Jails_2 disappeared except virtualbox.