Return-Path: X-Original-To: apmail-hive-user-archive@www.apache.org Delivered-To: apmail-hive-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 1547C7861 for ; Fri, 30 Sep 2011 18:50:58 +0000 (UTC) Received: (qmail 27098 invoked by uid 500); 30 Sep 2011 18:50:57 -0000 Delivered-To: apmail-hive-user-archive@hive.apache.org Received: (qmail 27065 invoked by uid 500); 30 Sep 2011 18:50:57 -0000 Mailing-List: contact user-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hive.apache.org Delivered-To: mailing list user@hive.apache.org Received: (qmail 27057 invoked by uid 99); 30 Sep 2011 18:50:57 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 30 Sep 2011 18:50:57 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 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 (athena.apache.org: domain of the1plummie@gmail.com designates 209.85.220.176 as permitted sender) Received: from [209.85.220.176] (HELO mail-vx0-f176.google.com) (209.85.220.176) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 30 Sep 2011 18:50:51 +0000 Received: by vcbfl13 with SMTP id fl13so2393362vcb.35 for ; Fri, 30 Sep 2011 11:50:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=fubj88wP6z5bUNuUd3piZ78tkjbN4ZDB8CBYeMWObeA=; b=Tr3ezqTiw3/pEI7VR8lZ1NsxgHhVrlAszVgnHr3gLlNoPo7N6nfNs6ZoKRnVcred4l aqv0QbzEVGyrqf7w+RvuRbGtD5ZOR43piTXepCeB4O05SU+ArrZeKY0NMkJXOYZ+IF9Z vfgf+xw1brq36L5pIZXSsPrEgzpsHg/YPpNno= MIME-Version: 1.0 Received: by 10.52.107.102 with SMTP id hb6mr11758177vdb.419.1317408630302; Fri, 30 Sep 2011 11:50:30 -0700 (PDT) Received: by 10.52.162.135 with HTTP; Fri, 30 Sep 2011 11:50:30 -0700 (PDT) Date: Fri, 30 Sep 2011 11:50:30 -0700 Message-ID: Subject: hive indexing From: Shouguo Li To: user@hive.apache.org Content-Type: multipart/alternative; boundary=bcaec54865d06ee6e304ae2d1939 --bcaec54865d06ee6e304ae2d1939 Content-Type: text/plain; charset=ISO-8859-1 hi, i'm looking at adding indexes to our hive tables, am wondering if anyone can share some thoughts on it. is there a performance/space trade off comparison or metrics? obviously it would be costly to index all columns in your tables, so what types of columns are worth indexing? thx! --bcaec54865d06ee6e304ae2d1939 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable hi, i'm looking at adding indexes to our hive tables, am wondering if a= nyone can share some thoughts on it. is there a performance/space trade off= comparison or metrics? obviously it would be costly to index all columns i= n your tables, so what types of columns are worth indexing?

thx!
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