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From Michael Segel <michael_se...@hotmail.com>
Subject RE: Does the scanner interface have a "previous" method?
Date Sun, 07 Mar 2010 15:20:52 GMT

What you're attempting to recreate is a 'scroll cursor'.
On very large data sets, this isn't trivial to do.

I think if you look at the use cases, you'll think of some other way of achieving your specific
goals.

Just my opinion...

-Mike


> Date: Sat, 6 Mar 2010 19:38:19 -0800
> Subject: Re: Does the scanner interface have a "previous" method?
> From: erikholstad@gmail.com
> To: hbase-user@hadoop.apache.org
> 
> Hey Hua!
> I agree that this would be a nice to have feature for cases when you want to
> fetch data in
> ascending and descending order. You would need to store any extra indices
> just open up
> a different scanner.
> The best way to do this now though is to store it in a different index.
> 
> Good luck!
> Erik
 		 	   		  
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