[OpenIndiana-discuss] zpool upgrade in OI151a5?

[Dan Swartzendruber]

Ah, that makes a lot of sense.  I DL'ed and read the paper.  Looks very
nice.  Thanks!

-----Original Message-----
From: Sašo Kiselkov [mailto:skiselkov.ml at gmail.com] 
Sent: Thursday, July 05, 2012 2:41 AM
To: Discussion list for OpenIndiana
Cc: Dan Swartzendruber
Subject: Re: [OpenIndiana-discuss] zpool upgrade in OI151a5?

On 07/05/2012 04:02 AM, Dan Swartzendruber wrote:
> Okay, thanks.  Is there a reason the pool version is not in the property
> anymore?  That's a bit confusing :(

The reason is that "version" is a one-dimensional number allowing for
only a single controlling authority (Sun) who defines what a version
means (in terms of features). So instead, Illumos decided to abandon it
(setting it to an arbitrarily high number to avoid conflicts with
intervening Oracle ZFS releases which continue to use the "version"
property) and instead using the so-called "feature-flags". See
http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf for a
more detailed description.

Cheers,
--
Saso