Re: Transaction Log

[Steve Atkins <steve(at)blighty(dot)com>]

On Aug 29, 2007, at 12:54 PM, Mark Mielke wrote:

> mbguy2000-1(at)yahoo(dot)com wrote:
> > For best performance, the transaction log should be on a separate  
> > disk.
> >
> > Does the writing of the log benefit from a battery backed  
> > controller as well?  If not, what do people think about writing  
> > the transaction log to a flash card or the like?
> How popular are the battery backed RAM drives that exist today? I  
> don't recall seeing them spoken about in this mailing list. The  
> local geek shop has these devices on sale. Are they still too  
> expensive?
>
> For those that don't know what I am talking about - they are PCI  
> devices that present themselves as a hard drive, but are filled  
> with commodity RAM instead of a magnetic platter, and a battery  
> that lasts a few weeks without external power.

It think the general conclusion was "When they come out with an ECC  
version, we'll look at them."

There are higher end ones that do have ECC RAM (and backup drives and  
stuff) but they're spectacularly more expensive than the cheapo  
consumer ones.

Cheers,
  Steve