On Wed, September 8, 2010 09:46, Tomas Ögren wrote:
> On 08 September, 2010 - Edward Ned Harvey sent me these 0,6K bytes:
>
>> Now when is dedup going to be ready? ;-)
>
> It's not in U9 at least:
> ...
> 16 stmf property support
> 17 Triple-parity RAID-Z
> 18 Snapshot user holds
> 19 Log device removal
> 20 Compression using zle (zero-length encoding)
> 21 Reserved
> 22 Received properties
> ...
That "Reserved" is telling, as that's when de-dupe was integrated:
http://hub.opensolaris.org/bin/view/Community+Group+zfs/21
I guess a bit more work needs to be done on it before back porting to
Solaris-proper occurs. Some of the stuff in ZFSv20 also has links to
de-dupe according to its Hub page: I'm guessing ZLE is used to a certain
extent in de-dupe.
I take it that ZLE is a form of run-length encoding.
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