Return-Path: X-Original-To: apmail-hadoop-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id D2E2B10099 for ; Mon, 1 Jul 2013 22:47:05 +0000 (UTC) Received: (qmail 26184 invoked by uid 500); 1 Jul 2013 22:47:01 -0000 Delivered-To: apmail-hadoop-user-archive@hadoop.apache.org Received: (qmail 26034 invoked by uid 500); 1 Jul 2013 22:47:01 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 26027 invoked by uid 99); 1 Jul 2013 22:47:01 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Jul 2013 22:47:01 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of john.lilley@redpoint.net designates 206.225.164.233 as permitted sender) Received: from [206.225.164.233] (HELO hub021-nj-8.exch021.serverdata.net) (206.225.164.233) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Jul 2013 22:46:53 +0000 Received: from MBX021-E3-NJ-2.exch021.domain.local ([10.240.4.78]) by HUB021-NJ-8.exch021.domain.local ([10.240.4.117]) with mapi id 14.03.0123.003; Mon, 1 Jul 2013 15:46:32 -0700 From: John Lilley To: "user@hadoop.apache.org" Subject: intermediate results files Thread-Topic: intermediate results files Thread-Index: Ac52rJVWgK0AbZOJQ4yq0PdjdquJCg== Date: Mon, 1 Jul 2013 22:46:32 +0000 Message-ID: <869970D71E26D7498BDAC4E1CA92226B658D5912@MBX021-E3-NJ-2.exch021.domain.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [173.160.43.61] Content-Type: multipart/alternative; boundary="_000_869970D71E26D7498BDAC4E1CA92226B658D5912MBX021E3NJ2exch_" MIME-Version: 1.0 X-Virus-Checked: Checked by ClamAV on apache.org --_000_869970D71E26D7498BDAC4E1CA92226B658D5912MBX021E3NJ2exch_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable If my reducers are going to create results that are temporary in nature (co= nsumed by the next processing stage) is it recommended to use a replication= factor <3 to improve performance? Thanks john --_000_869970D71E26D7498BDAC4E1CA92226B658D5912MBX021E3NJ2exch_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

If my reducers are going to create results that are = temporary in nature (consumed by the next processing stage) is it recommend= ed to use a replication factor <3 to improve performance? 

Thanks

john

 

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