Return-Path: Delivered-To: apmail-hbase-user-archive@www.apache.org Received: (qmail 16819 invoked from network); 22 Dec 2010 21:54:02 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 22 Dec 2010 21:54:02 -0000 Received: (qmail 80962 invoked by uid 500); 22 Dec 2010 21:54:01 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 80937 invoked by uid 500); 22 Dec 2010 21:54:01 -0000 Mailing-List: contact user-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hbase.apache.org Delivered-To: mailing list user@hbase.apache.org Received: (qmail 80929 invoked by uid 99); 22 Dec 2010 21:54:01 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 22 Dec 2010 21:54:01 +0000 X-ASF-Spam-Status: No, hits=1.5 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of yuzhihong@gmail.com designates 209.85.161.50 as permitted sender) Received: from [209.85.161.50] (HELO mail-fx0-f50.google.com) (209.85.161.50) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 22 Dec 2010 21:53:53 +0000 Received: by fxm14 with SMTP id 14so5545192fxm.23 for ; Wed, 22 Dec 2010 13:53:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=K0UR1FScMAGx/vkWwzh9pNl+ScQllQb//rMaHHWZteo=; b=t10jsOgdJR9Xwrzkm1SXM7mm7MoldDJ0HPnfW+qEYqZ32ODB9muxqZtatx5Q27oopB Kik6Zvvq37JexhA2QHbmWS9gyd6syzNr3zVvep+TjJkuC1whHkciehLToHigK7q1bAsg 71bqFnd/vldETHO35b3rGiXAxbrYizLdqoWf0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=LM4/KXNbkTbiwhG7JUfwBVpyZTAcGJHFwQ1B9Dy45EjhtFGdfn54JVoGV2kXd80GKJ mvUy4GGtvtAM3ZmQyKc1fCaUROd3nWIinqq283dhTWJsJgRS/v5HtPKy6fwRkMpzzlKR G8nTN2yfS8kz3LJAtES7VOT2dxf4bEuqa2pns= MIME-Version: 1.0 Received: by 10.223.98.193 with SMTP id r1mr1186610fan.83.1293054812759; Wed, 22 Dec 2010 13:53:32 -0800 (PST) Received: by 10.223.83.200 with HTTP; Wed, 22 Dec 2010 13:53:32 -0800 (PST) In-Reply-To: References: Date: Wed, 22 Dec 2010 13:53:32 -0800 Message-ID: Subject: Re: Possible to scan row keys only? From: Ted Yu To: user@hbase.apache.org Content-Type: multipart/alternative; boundary=20cf3054a34dca2849049806c84f X-Virus-Checked: Checked by ClamAV on apache.org --20cf3054a34dca2849049806c84f Content-Type: text/plain; charset=ISO-8859-1 How about HBASE-1537 ? On Wed, Dec 22, 2010 at 1:38 PM, Leo Alekseyev wrote: > I need to retrieve row keys from several big tables. Is it possible > to do so by just reading the key and truncating the value? I see that > HBASE-1481 implements FirstKeyOnlyFilter, but it doesn't help in our > case, since we have only one KeyValue per row, and it stores binary > data. > > Is there an easy way to accomplish fast key-only retrieval? > > --Leo > --20cf3054a34dca2849049806c84f--