Re: is parallel union all possible over dblink?

On 06/29/2011 02:14 PM, Greg Spiegelberg wrote:

> Another alternative is to use GridSQL. I haven't used it myself but
> seen it in action on a large install with 4 backend databases. Pretty
> slick.

We actually demoed this as a proof of concept a while back. Even just
having two instances on the same machine resulted in linear improvements
in execution speed thanks to parallel query execution.

Setting it up is something of a PITA, though, and the metadata database
is completely arbitrary. You basically must use the GridSQL intermediate
layer if you ever want to see your data again. I wouldn't use it for
anything but a reporting database that can be reconstructed if necessary.

--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 800 | Chicago IL, 60604
312-676-8870
sthomas@peak6.com

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