The Last Octet

Here's a quick look at the dedup results on the test box I built a week back. While this isn't a detailed test, you can see ZFS dedup in action.

1. Base File System

   NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
   rpool   696G  5.59G   690G     0%  1.00x  ONLINE  -

2. Result After Copying Up the OpenSolaris 2009.06 ISO

   NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
   rpool   696G  6.23G   690G     0%  1.00x  ONLINE  -

3. Result After Copying Up a 2nd OpenSolaris 2009.06 ISO

   NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
   rpool   696G  6.23G   690G     0%  1.92x  ONLINE  -

4. Result After Copying Up the OpenSolaris Build131 ISO

   NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
   rpool   696G  6.84G   689G     0%  1.50x  ONLINE  -

5. Result After Copying Up the a 2nd OpenSolaris Build131 ISO

   NAME    SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
   rpool   696G  6.89G   689G     0%  2.00x  ONLINE  -

So in summary, I wrote about 2.6 GB of data to the pool and only consumed about 1GB of free space. Not bad, though it should be a bit more interesting when we start loading the box up with VMDK files.