Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 67854 invoked from network); 11 Jun 2008 22:03:46 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 11 Jun 2008 22:03:46 -0000 Received: (qmail 42111 invoked by uid 500); 11 Jun 2008 22:03:48 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 42085 invoked by uid 500); 11 Jun 2008 22:03:48 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 42072 invoked by uid 99); 11 Jun 2008 22:03:48 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 11 Jun 2008 15:03:48 -0700 X-ASF-Spam-Status: No, hits=2.0 required=10.0 tests=HTML_MESSAGE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of chanch13@gmail.com designates 209.85.142.184 as permitted sender) Received: from [209.85.142.184] (HELO ti-out-0910.google.com) (209.85.142.184) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 11 Jun 2008 22:02:59 +0000 Received: by ti-out-0910.google.com with SMTP id d27so915982tid.9 for ; Wed, 11 Jun 2008 15:03:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:mime-version:content-type; bh=qOwSo5ZZomYBvzh9E24NlZux1HtPA6/v1tKre6H/ye4=; b=tp2yBU6IXXCu6mdZOlcgu9vX6UjslEbt0LAs9m2eBU9Dya8pYa0l4FpjV6+Lx7ejCK bqjs/CY3sGI8Frk8OyzI+4xuOJP0AnZT9zQTMs6pwymEfP1Y53cLiNaMyNQPlMuMTUl+ Jed7F3eM35vNj8m3uBZcXTExRYy0H0j/rlOKM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type; b=ENoBu5qeyD7po/l62hNMuSkOySH4omd7vR3BOty4SxheAkJN0iXHNXNUFJrLc1GjZi N5D1i7zhe7h+HYGWLHJzPwC0YEUgVPraBQptGmKP1HNINHyO/FgsFXXnIVjpJlC9s0RW qcXZj7dDHQr1HSiQP5xz/waRQCz0eXmXmx45g= Received: by 10.110.47.17 with SMTP id u17mr186164tiu.46.1213221796446; Wed, 11 Jun 2008 15:03:16 -0700 (PDT) Received: by 10.110.73.5 with HTTP; Wed, 11 Jun 2008 15:03:16 -0700 (PDT) Message-ID: Date: Wed, 11 Jun 2008 17:03:16 -0500 From: "Chanchal James" To: core-dev@hadoop.apache.org Subject: Question about Hadoop MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_26474_26114559.1213221796434" X-Virus-Checked: Checked by ClamAV on apache.org ------=_Part_26474_26114559.1213221796434 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi, I have a question about Hadoop. I am a beginner and just testing Hadoop. Would like to know how a php application would benefit from this, say an application that needs to work on large number of image files. Do I have to store the application in HDFS always, or do I just copy it to HDFS when needed, do the processing, and then copy it back to the local file system ? Is that the case with the data files too ? Once I have Hadoop running, do I keep all data & application files in HDFS always, and not use local file system storage ? Thank you. ------=_Part_26474_26114559.1213221796434--