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From Keith Turner <ke...@deenlo.com>
Subject Re: Scan vs Filter performance.
Date Mon, 28 Sep 2015 16:35:15 GMT
On Mon, Sep 28, 2015 at 12:19 PM, Moises Baly <moises@spatially.com> wrote:

> Hi all:
>
> I would like to perform a range scan on a table, tweaking the definition
> of what goes into a particular key range. One way I can think of is writing
> a filter on the key, and that would work fine. But I think it would be slow
> compared to a scan / seek custom iterator. How does the underlying login
> works? Does Filter goes through all records, or since is sorted follows the
> same underlying logic as a scan? Would a custom iterator perform better?
>

Yes, filter will read all data.  Custom iterator that seeks may be faster.

Are you aware of the following?

https://issues.apache.org/jira/browse/ACCUMULO-3961
https://github.com/apache/accumulo/pull/42


>
> Thank you for your time,
>
> Moises
>

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