richard wrote:
> Preface: yes, shrink will be cool.  But we've been
> running highly  
> available,
> mission critical datacenters for more than 50 years
> without shrink being
> widely available.

I would debate that.  I remember batch windows and downtime delaying one's 
career movement.  Today we are 24x7 where an outage can kill an entire business.

> Do it exactly the same way you do it for UFS.  You've
> been using UFS
> for years without shrink, right?  Surely you have
> procedures in  
> place :-)

While I haven't taken a formal survey, everywhere I look I see JFS on AIX and 
VxFS on Solaris.  I haven't been in a production UFS shop this decade.

> Backout plans are not always simple reversals.  A
> well managed site will
> have procedures for rolling upgrades.

I agree with everything you wrote.  Today other technologies allow live changes 
to the pool, so companies use those technologies instead of ZFS.

> There is more than one way to skin a cat.

Which entirely misses the point.
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