dlangille

CPU: Intel(R) Atom(TM) CPU D525   @ 1.80GHz (1800.04-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x106ca  Family = 0x6  Model = 0x1c  Stepping = 10
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,MOVBE>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 4081803264 (3892 MB)

dlangille

[root@cuppy:/usr/home/dan] # btape -c /usr/local/etc/bacula/bacula-sd.conf /dev/nsa1                                                                                                
Tape block granularity is 1024 bytes.
btape: butil.c:287-0 Using device: "/dev/nsa1" for writing.
btape: btape.c:469-0 open device "DLT" (/dev/nsa1): OK
*test

=== Write, rewind, and re-read test ===

I'm going to write 10000 records and an EOF
then write 10000 records and an EOF, then rewind,

dlangille

#!/bin/sh

POUDRIERE="/usr/local/bin/poudriere"

TREES="default testing"

AMD64_SETS="master-list master-list-php5"
I386_SETS="master-list-i386"

dlangille

An example of how zfs destroy -r will remove snapshots on child datasets.

[root@slocum:~] # zfs create system/SnapShotTesting
[root@slocum:~] # zfs create system/SnapShotTesting/A
[root@slocum:~] # zfs create system/SnapShotTesting/B
[root@slocum:~] # zfs create system/SnapShotTesting/B 
cannot create 'system/SnapShotTesting/B': dataset already exists
[root@slocum:~] # zfs create system/SnapShotTesting/C
[root@slocum:~] # zfs create system/SnapShotTesting/C/CC
[root@slocum:~] # zfs snapshot -r system/SnapShotTesting@TEST

dlangille

#!/bin/sh

HOSTVERSION=`/usr/bin/file /bin/sh`

JAILS=`/usr/local/sbin/iocage list | /usr/bin/egrep -v '^JID' | /usr/bin/cut -f 2 -w`
ERRORS=''
for jail in ${JAILS}
do
  JAILVERSION=`/usr/local/sbin/iocage chroot ${jail} 'file /bin/sh'`
  if [ "${JAILVERSION}" != "${HOSTVERSION}" ]

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