SOLVED How to force delete a snapshot

[kjstech]

The web UI thinks a snapshot is "busy" so when I try to delete one I get this error : cannot destroy snapshot backups@auto-20140315.1448-2d: dataset is busy

So is there a command line I can enter to force this thing gone? It's taking up too much space.

 

[bigphil]

Check for any holds on the snapshot using the "zfs holds" command. Also...read the following article for additional information on working with snapshots and how to force removal if needed.

http://docs.oracle.com/cd/E19082-01/817-2271/6mhupg6o0/index.html
http://docs.oracle.com/cd/E19253-01/819-5461/gammq/index.html

 

[leenux_tux]

Be VERY careful when issuing such destructive commands on your system from the command line. Only use "zfs destroy" as a last resort. Take a look here.... "http://docs.oracle.com/cd/E19253-01/819-5461/gbcya/index.html".

The name of your snapshot contains the text "auto". This to me means you have setup an automated jobs to take snapshots of a specific file system ? If this is the case, you can not remove a parent snapshot whilst there is a child snapshot in place.

Look here for more information "http://docs.oracle.com/cd/E23824_01/html/821-1448/gbciq.html"

Apologies for using "Oracle" documentation as a reference but this is something that I find is a useful reference.

 

[kjstech]

I removed the holds it was tagged .snap-5311 or something like that.
I rebooted.
I tried zfs destroy -r
zfs destroy -R
zfs destroy -f

It always says dataset is busy.
I even disabled ssh since replication uses that and rebooted with ssh off.
It doesn't say it has children or dependencies. I can't make this go away. I wish there was the -nuclearredbutton option to jump past the code that causes 'dataset is busy' and just executes it.

 

[kjstech]

Ok finally got it removed.

ps -A |grep zfs

5277 zfsL sending backups@auto-20140315.1448-2d (2%: 103172568
kill -9 5277
zfs destroy -f backups@auto-20140315.1448-2d

done.

There was a stuck replication I guess.