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To: pgsql-performance@postgresql.org
Subject: Re: Migrating to Postgresql and new hardware
References: <E0B1224AD40B544B9DE1BCC6008E95220D1F192CC2@UF05.unifaun.se>
	<EF37296944B47C40ADDCCB7BFD6289FE046FCD5EFC@EMASC201VS01.exchad.jpmchase.net>
Date: Tue, 18 Jan 2011 16:53:29 -0600
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From: "Mark Felder" <feld@feld.me>
Message-ID: <op.vpi0jfzv34t2sn@tech304>
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On Tue, 18 Jan 2011 16:06:17 -0600, Strange, John W  
<john.w.strange@jpmchase.com> wrote:

> Of course this is based on my experience, and I have my fireproof suit  
> since I mentioned the word fusionIO :)

I'll throw a fire blanket up as well. We have a customer who has been  
running Fusion IO with Postgres for about 2 years. They get amazing  
performance, but also aren't running fsync. They haven't had corruption  
with OS crashes (they're very abusive to their CentOS install), but did  
with a power outage (a UPS of ours went up in smoke; they weren't paying  
for N+1 power). Now their data is mostly static; they run analytics once a  
day and if they have a problem they can reload yesterday's data and run  
the analytics again to get back up to speed. If this is the type of stuff  
you're doing and you can easily get your data back to a sane state by all  
means give FusionIO a whirl!

This customer did discuss this with me in length last time they stopped in  
and also pointed out that FusionIO was announced as being a major part of  
some trading company or bank firm's database performance junk. I don't  
know the details, but I think he said they were out of Chicago. If anyone  
knows what I'm talking about please share the link. Either way, it seems  
that people are actually doing money transactions on FusionIO, so you can  
either take that as comforting reassurance or you can start getting really  
nervous about the stock market :-)


Regards,


Mark


PS, don't turn off fsync unless you know what you're doing.