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Date: Fri, 25 Jun 2010 23:00:46 +0400
Message-ID: <AANLkTimPD_MBsHsivJoKfbv1boSzc0b7lWwLtTrSXSDc@mail.gmail.com>
Subject: Re: descending keys
From: Andrey Stepachev <octo47@gmail.com>
To: user@hbase.apache.org
Content-Type: text/plain; charset=UTF-8

use Long.MAX - incrementColumnValue() as qualifier

2010/6/25 N Kapshoo <nkapshoo@gmail.com>:
> I have a 'long' number that I get by using
> HTable.'incrementColumnValue'. This long is used as the qualifier id
> on a columnFamily.
>
> However in my listings, I always want the latest number first
> (descending order basically).
>
> Currently I call the NavigableMap.descendingKeySet after I do the 'Get'.
>
> Is this the optimal way of doing it? Can I do something that can be
> faster? Especially if I start filtering out and getting only first
> 1000 etc then this wont work.
>
> How should I go about this? Change the key or is there something else
> I can do while creating the table, doing a Get etc?
>
> Thanks.
>