Does the Slave pfs take up more space that the Master?

[Siju George]

Hi,

I have two hammer file systems.

Backup1                   454G   281G   173G    62%    /Backup1
Backup2                   454G   316G   138G    70%    /Backup2

on a 2.7-DEVELOPMENT DragonFly v2.7.0.54.g0754fe-DEVELOPMENT #18: Wed Apr  7

Backup1 contains 3 pfses

dfly-bkpsrv# cd /Backup1
dfly-bkpsrv# ls -l
total 0
drwxr-xr-x  1 root  wheel  0 Mar 26 13:38 Data
drwxr-xr-x  1 root  wheel  0 Apr  5 15:36 VersionControl
drwxr-xr-x  1 root  wheel  0 Oct  8  2009 pfs
drwxr-xr-x  1 root  wheel  0 Feb  3 09:46 test

Backup2 contains just the mirrored slves of the above 3 pfses

dfly-bkpsrv# cd /Backup2
dfly-bkpsrv# ls -l
total 0
lrwxr-xr-x  1 root  wheel  17 Jul  7  2009 Data -> /Backup2/pfs/Data
lrwxr-xr-x  1 root  wheel  27 Sep 28  2009 VersionControl ->
/Backup2/pfs/VersionControl
drwxr-xr-x  1 root  wheel   0 Oct  8  2009 pfs
lrwxr-xr-x  1 root  wheel  17 Oct  8  2009 test -> /Backup2/pfs/test

the snapshots are the same as of now for both masters and slaves

dfly-bkpsrv# hammer snapls /Backup1/Data/
Snapshots on /Backup1/Data      PFS #1
Transaction ID                   Timestamp                      Note
0x00000001b998acd0      2010-04-07 13:04:02 IST -
0x00000001bd9525b0      2010-04-08 20:30:06 IST -
0x00000001bf96f710        2010-04-09 20:30:07 IST -
dfly-bkpsrv# hammer snapls /Backup2/Data/
Snapshots on (null)     PFS #1
Transaction ID                   Timestamp                       Note
0x00000001b998acd0      2010-04-07 13:04:02 IST -
0x00000001bd9525b0      2010-04-08 20:30:06 IST -
0x00000001bf96f710        2010-04-09 20:30:07 IST -
dfly-bkpsrv#

dfly-bkpsrv# hammer snapls /Backup1/VersionControl/
Snapshots on /Backup1/VersionControl    PFS #2
Transaction ID                   Timestamp                       Note
0x00000001b99af1c0       2010-04-07 13:24:57 IST -
0x00000001bd952790      2010-04-08 20:56:40 IST -
0x00000001bf96f8d0        2010-04-09 20:56:48 IST -
dfly-bkpsrv# hammer snapls /Backup2/VersionControl/
Snapshots on (null)     PFS #2
Transaction ID                   Timestamp                       Note
0x00000001b99af1c0       2010-04-07 13:24:57 IST -
0x00000001bd952790      2010-04-08 20:56:40 IST -
0x00000001bf96f8d0        2010-04-09 20:56:48 IST -

Snapshots on /Backup1/test      PFS #3
Transaction ID                   Timestamp               Note
0x00000001c1982760      2010-04-12 14:27:30 IST -
dfly-bkpsrv# hammer snapls /Backup2/test/
Snapshots on (null)     PFS #3
Transaction ID                    Timestamp               Note
0x00000001bf980a60       2010-04-12 14:27:38 IST -


So why Backup2 70% filled while Backup1 is only 62% filled ?

Thanks :-)

--Siju