dlangille

$ zfs destroy -nv system/usr/jails@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/pg93@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/mysql55@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/pg94@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/empty@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/toiler@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/pg90@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/ansible@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/snapshots@BeforeUpgradingBaseJailFrom9.1To9.3
would destroy system/usr/jails/ansible-slave@BeforeUpgradingBaseJailFrom9.1To9.3

dlangille

$ wget -S http://www.google.com/
--2015-04-11 15:40:52--  http://www.google.com/
Resolving www.google.com (www.google.com)... 64.233.168.147, 64.233.168.106, 64.233.168.104, ...
Connecting to www.google.com (www.google.com)|64.233.168.147|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 302 Found
  Location: http://t-mo.co/IntSMH
  Content-Type: text/html; charset=iso-8859-1
  Proxy-Connection: close
Location: http://t-mo.co/IntSMH [following]

dlangille

[dan@knew:~] $ zfs list
NAME                                  USED  AVAIL  REFER  MOUNTPOINT
system                               16.6T  3.67T   329K  /
system/backups-by-snapshot           10.2G  3.67T   384K  /usr/home/ansel/snapshots
system/backups-by-snapshot/mailjail  10.2G  3.67T  9.46G  /usr/home/ansel/snapshots/mailjail
system/backups-by-snapshot/mounted    329K  3.67T   329K  /usr/home/ansel/snapshots/mounted
system/backups-by-snapshot/testing    329K  3.67T   329K  /usr/home/ansel/snapshots/testing
system/root                          1.76M  3.67T   567K  /root
system/rootfs                        4.54G  3.67T  3.01G  legacy
system/tmp                           7.78G  3.67T  7.69G  /tmp

dlangille

This says 2.6TB used, but only 416GB referred.  My conclusion: I could free up 416G
by removing the snapshots.

$ zfs list -r -t all -o name,used,refer,written  system/usr/jails/dbclone.backups
NAME                                                       USED  REFER  WRITTEN
system/usr/jails/dbclone.backups                          2.61T   416G        0
system/usr/jails/dbclone.backups@2015-02-01_06.21.00--3m      0   389G     389G
system/usr/jails/dbclone.backups@2015-02-01_07.21.00--3m      0   389G        0
system/usr/jails/dbclone.backups@2015-02-01_08.21.00--3m      0   389G        0
system/usr/jails/dbclone.backups@2015-02-01_09.21.00--3m      0   389G        0

dlangille

Based on this:

$ zfs get usedbysnapshots system/usr/local/bacula 
NAME                     PROPERTY         VALUE     SOURCE
system/usr/local/bacula  usedbysnapshots  3.26T     -

... removing all snapshots should free up 3.26T.

But looking below, I found it difficult to see that.

dlangille

$ diff -uN $D/client-zuul.conf client-zuul.conf
+++ /.zfs/snapshot/2015-05-01_05.21.00--3m/usr/local/etc/bacula/client-zuul.conf        2015-03-04 20:03:11.271133766 +0000
--- client-zuul.conf    2015-05-02 19:57:35.949442304 +0000
@@ -1,13 +1,11 @@
 # Client (File Services) to backup
 Client {
   Name           = zuul-fd
+  Address        = zuul.example.org
-  Address        = zuul.vpn.example.org
   FDPort         = 9102

dlangille

[dan@slocum:/usr/jails] $ sudo du -ch -d 1 .
 38G    ./bacula
3.5G    ./bacula156
 94G    ./metrics
3.5G    ./bacula164
3.5G    ./bacula163
3.5G    ./bacula169
3.5G    ./bacula151
3.4G    ./minion
3.5G    ./bacula170

dlangille

+---------------------+---------------------+------------+--------------+
| Connected (UTC)     | Disconnected (UTC)  | Connected  | Disconnected |
|---------------------+---------------------+------------+--------------+
| 2015-03-25 05:35:34 | 2015-05-02 21:27:47 |   1d 21:27 |     0d 00:00 |
| 2015-05-02 21:39:29 | 2015-05-21 08:16:32 |  18d 10:37 |     0d 00:11 |
| 2015-05-21 08:19:14 | 2015-05-21 08:40:57 |   0d 00:21 |     0d 00:02 |
| 2015-05-21 08:43:22 | Still up            |  10d 15:16 |     0d 00:02 |
+---------------------+---------------------+------------+--------------+

dlangille

bsdcan=# \d person
                                            Table "public.person"
     Column      |            Type             |                          Modifiers                          
-----------------+-----------------------------+-------------------------------------------------------------
 id              | integer                     | not null default nextval('person_id_seq'::regclass)
 date_added      | timestamp without time zone | not null default ('now'::text)::timestamp(6) with time zone
 first_name      | text                        | not null
 last_name       | text                        | not null

dlangille

[root@dvl ~]#
ugen0.5: <RDing> at usbus0
ukbd0: <RDing TEMPerV1.4, class 0/0, rev 2.00/0.01, addr 5> on usbus0
kbd1 at ukbd0
ums0: <RDing TEMPerV1.4, class 0/0, rev 2.00/0.01, addr 5> on usbus0