VxFS 6.0 comes with de-dupe!

For those of you who don't want to watch Symantec's video, here's a quick & cheap howto of a VxFS de-dupe test using SFHA 6.0 under RHEL5.8:

First, here's our setup:

[root@vcs11 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/rootdg-lv_root
                      15109112   9258676   5070560  65% /
/dev/sda1               101086     20027     75840  21% /boot
tmpfs                  1029372         0   1029372   0% /dev/shm
tmpfs                        4         0         4   0% /dev/vx
/dev/vx/dsk/vcsdg/lv_vcs
                        131072      4473    118813   4% /shared/vcs

Let's check the initial state of this setup:

[root@vcs11 ~]# /opt/VRTS/bin/fsadm -S shared /shared/vcs
 Mountpoint    Size(KB)    Available(KB)   Used(KB)   Logical_Size(KB) Space_Saved(KB)
/shared/vcs      131072        118813        4473              4473              0

Enable de-dupe for our test filesystem:

[root@vcs11 ~]# /opt/VRTS/bin/fsdedupadm enable /shared/vcs -c 4096

Copy some data:

[root@vcs11 ~]# cp -a /etc/lvm /shared/vcs/lvm1

Check the results (nothing happened):

[root@vcs11 ~]# /opt/VRTS/bin/fsadm -S shared /shared/vcs
 Mountpoint    Size(KB)    Available(KB)   Used(KB)   Logical_Size(KB) Space_Saved(KB)
/shared/vcs      131072        118724        4562              4562              0

Copy some data again and again:

[root@vcs11 ~]# cp -a /etc/lvm /shared/vcs/lvm2
[root@vcs11 ~]# cp -a /etc/lvm /shared/vcs/lvm3
[root@vcs11 ~]# cp -a /etc/lvm /shared/vcs/lvm4

Still no change!

[root@vcs11 ~]# /opt/VRTS/bin/fsadm -S shared /shared/vcs
 Mountpoint    Size(KB)    Available(KB)   Used(KB)   Logical_Size(KB) Space_Saved(KB)
/shared/vcs      131072        118457        4829              4829              0

Enable De-dupe for our node:

[root@vcs11 ~]# /opt/VRTS/bin/fsdedupadm list /shared/vcs
Chunksize Enabled Schedule        NodeList        Filesystem
--------------------------------------------------------------------------------
4096      YES     NONE            vcs10.lasthome. /shared/vcs
[root@vcs11 ~]# /opt/VRTS/bin/fsdedupadm setnodelist vcs11.lasthome.solace.krynn /shared/vcs

Start the de-dupe process:

[root@vcs11 ~]# /opt/VRTS/bin/fsdedupadm start /shared/vcs
UX:vxfs fsdedupadm: INFO: V-3-27767:  deduplication is started on /shared/vcs.

Check the results:

[root@vcs11 ~]# /opt/VRTS/bin/fsdedupadm status /shared/vcs
Saving    Status    Node            Type        Filesystem
--------------------------------------------------------------------------------
05%       COMPLETED vcs11           MANUAL      /shared/vcs
        2012/01/16 17:11:25 Begin full scan
        2012/01/16 17:11:29 End detecting duplicates and filesystem changes.

[root@vcs11 ~]# /opt/VRTS/bin/fsadm -S shared /shared/vcs
 Mountpoint    Size(KB)    Available(KB)   Used(KB)   Logical_Size(KB) Space_Saved(KB)
/shared/vcs      131072        118363        4906              5167            261