Return-Path: Delivered-To: apmail-lucene-hadoop-user-archive@locus.apache.org Received: (qmail 84515 invoked from network); 22 May 2007 00:33:05 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 22 May 2007 00:33:05 -0000 Received: (qmail 37299 invoked by uid 500); 22 May 2007 00:33:10 -0000 Delivered-To: apmail-lucene-hadoop-user-archive@lucene.apache.org Received: (qmail 36969 invoked by uid 500); 22 May 2007 00:33:09 -0000 Mailing-List: contact hadoop-user-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hadoop-user@lucene.apache.org Delivered-To: mailing list hadoop-user@lucene.apache.org Received: (qmail 36945 invoked by uid 99); 22 May 2007 00:33:09 -0000 Received: from herse.apache.org (HELO herse.apache.org) (140.211.11.133) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 21 May 2007 17:33:09 -0700 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received-SPF: neutral (herse.apache.org: local policy) Received: from [207.126.228.149] (HELO rsmtp1.corp.yahoo.com) (207.126.228.149) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 21 May 2007 17:33:01 -0700 Received: from [10.72.104.183] (enoughhot-lx.corp.yahoo.com [10.72.104.183]) (authenticated bits=0) by rsmtp1.corp.yahoo.com (8.13.8/8.13.6/y.rout) with ESMTP id l4M0WRoQ068966 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 21 May 2007 17:32:27 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; s=serpent; d=yahoo-inc.com; c=nofws; q=dns; h=message-id:date:from:user-agent:x-accept-language: mime-version:to:subject:references:in-reply-to:content-type:content-transfer-encoding; b=2ab6gLBpo4/oHrbQXXlKzs7sunWOy9aODiKfpp42IgHnvsWGNXtLs5RC8qhob0jk Message-ID: <46523A19.50703@yahoo-inc.com> Date: Mon, 21 May 2007 17:32:25 -0700 From: Konstantin Shvachko User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: hadoop-user@lucene.apache.org Subject: Re: Does Hadoop support Random Read/Write? References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Hadoop does not support random writes. Hadoop does support random reads. http://lucene.apache.org/hadoop/hdfs_design.html#Simple+Coherency+Model Wayne Liu wrote: > Hello, > > It says that Hadoop supports the common file system operations, so I > just want to ask if it supports Random Read/Write the file? > > Waiting for your reply, thanks a lot! >