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From "Moore, Matthew J." <MATTHEW.J.MO...@saic.com>
Subject RE: Running Accumulo straight from Memory
Date Thu, 13 Sep 2012 12:47:45 GMT
You guys are confirming what we predicted.  This was a "like to have"
from our customer and we wanted to see if anyone else had tried this.
Thanks.

 

Matt

 

 

 

From: user-return-1336-MATTHEW.J.MOORE=saic.com@accumulo.apache.org
[mailto:user-return-1336-MATTHEW.J.MOORE=saic.com@accumulo.apache.org]
On Behalf Of Adam Fuchs
Sent: Wednesday, September 12, 2012 5:28 PM
To: user@accumulo.apache.org
Subject: Re: Running Accumulo straight from Memory

 

Yes, the effect of locality groups would be about the same in an in
memory system. The only exception would be if you're not using locality
groups and are fetching a particular column, the automatic seeking
behavior of the column filtering iterator would be more efficient with
in memory rfiles.

Adam

On Sep 12, 2012 5:20 PM, "David Medinets" <david.medinets@gmail.com>
wrote:

Why would locality groups be useful in an in-memory system?

On Wed, Sep 12, 2012 at 4:53 PM, Adam Fuchs <afuchs@apache.org> wrote:
> Even if you are just using memory, minor and major compactions are
important
> to get compression, handle deletes, get sequential access (cache line
> efficiency), use iterators, and introduce locality groups.


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