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From: Alvaro Herrera <[email protected]>
To: Josh Berkus <[email protected]>
Cc: PostgreSQL Development <[email protected]>
Subject: Re: [pgsql-www] Release cycle length
Date: Tue, 18 Nov 2003 15:17:50 -0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

On Tue, Nov 18, 2003 at 09:42:31AM -0800, Josh Berkus wrote:

> (Oddly enough, my problem in doing more testing myself is external to 
> PostgreSQL; most of our apps are PHP apps and you can't compile PHP against 
> two different versions of PostgreSQL on the same server.   Maybe with User 
> Mode Linux I'll be able to do more testing now.)

I'm not sure UML would help you here.  I think you'd be better trying to
run Apache in a chrooted environment, PHP and PostgreSQL included.  You
don't need another kernel, but another set of libraries.

BTW, I think UMLSIM (umlsim.sf.net) could help to play the
"unplug-the-server" game.  In theory you could rewrite the block
subsystem to "fail", simulating a real disk failure and possible a
system shutdown.  I don't have time to do it myself right now however ...

-- 
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"Find a bug in a program, and fix it, and the program will work today.
Show the program how to find and fix a bug, and the program
will work forever" (Oliver Silfridge)

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