Re: SSD performance - Mailing list pgsql-performance

From david@lang.hm
Subject Re: SSD performance
Date
Msg-id alpine.DEB.1.10.0901250034080.16162@asgard.lang.hm
Whole thread Raw
In response to Re: SSD performance  (Greg Smith <gsmith@gregsmith.com>)
Responses Re: SSD performance  (Gregory Stark <stark@enterprisedb.com>)
List pgsql-performance
On Sun, 25 Jan 2009, Greg Smith wrote:

> On Fri, 23 Jan 2009, david@lang.hm wrote:
>
>> take a look at this ram based drive, specificly look at the numbers here
>> http://techreport.com/articles.x/16255/9
>> they are about as much above the X25-e as the X25-e is above normal drives.
>
> They're so close to having a killer product with that one.  All they need to
> do is make the backup to the CF card automatic once the battery backup power
> drops low (but not so low there's not enough power to do said backup) and it
> would actually be a reasonable solution.  The whole battery-backed cache
> approach is risky enough when the battery is expected to last a day or two;
> with this product only giving 4 hours, it not hard to imagine situations
> where you'd lose everything on there.

they currently have it do a backup immediatly on power loss (which is a
safe choice as the contents won't be changing without power), but it then
powers off (which is not good for startup time afterwords)

David Lang

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