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Re: Pre-allocation of space: a business rationale

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: dave(dot)bath(at)unix(dot)net, pgsql-admin(at)postgresql(dot)org
Subject: Re: Pre-allocation of space: a business rationale
Date: 2005-11-03 19:21:30
Message-ID: 20051103192130.GT55520@pervasive.com (view raw or flat)
Thread:
Lists: pgsql-admin
On Wed, Nov 02, 2005 at 10:48:00PM -0500, Tom Lane wrote:
> "Bath, David" <dave(dot)bath(at)unix(dot)net> writes:
> > C) I want to avoid the possibility of uncontrolled growth of luser data
> >    blowing disk leading to stoppage of 24x7 data.
> 
> You put the luser data and the critical data into separate tablespaces
> that are in separate partitions (filesystems).  End of problem ...
> 
> (And no, I don't believe in having Postgres reinvent filesystem-level
> functionality.  If you didn't set up appropriate hard partitions,
> consider a loopback filesystem for your tablespace.)

Does every OS we support have a loopback filesystem? Can they all impose
space limits?

It doesn't seem unreasonable to support a limit on tablespace (or table)
size. It also doesn't seem like it would take that much code to add
support for it. Of course usual disclaimer about 'submit a patch then'
applies, but it sounds like such a patch would get rejected out-of-hand.
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby(at)pervasive(dot)com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461

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