Return-Path: Delivered-To: apmail-hadoop-common-dev-archive@www.apache.org Received: (qmail 61650 invoked from network); 7 Mar 2011 21:06:02 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 7 Mar 2011 21:06:02 -0000 Received: (qmail 47862 invoked by uid 500); 7 Mar 2011 21:06:00 -0000 Delivered-To: apmail-hadoop-common-dev-archive@hadoop.apache.org Received: (qmail 47808 invoked by uid 500); 7 Mar 2011 21:06:00 -0000 Mailing-List: contact common-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-dev@hadoop.apache.org Delivered-To: mailing list common-dev@hadoop.apache.org Received: (qmail 47800 invoked by uid 99); 7 Mar 2011 21:06:00 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 Mar 2011 21:06:00 +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 gautam.singaraju@gmail.com designates 209.85.214.176 as permitted sender) Received: from [209.85.214.176] (HELO mail-iw0-f176.google.com) (209.85.214.176) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 Mar 2011 21:05:56 +0000 Received: by iwr19 with SMTP id 19so6285389iwr.35 for ; Mon, 07 Mar 2011 13:05:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=VQGHcOYEGDNsQKWhO4+HMmVJ5aYTGWJNmKerS1iSago=; b=udnYTf3P/jWKbYzjwZ7BCtrYvxBKRKEUfPE99bGPwf0116Yo7KgwiFv5EpZ123ld/3 Ke1VayEmiRFlr9uoHLEeWGuF5EjKIU3pZyWVUv8zHZks+lPBU/2pgxhtv25szjt81tmK ASxSPdTE+FL1pAYqAcn9culYRElxxvjweCl4k= 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 :cc:content-type; b=WuTTmOGX1sCU8V3A07TadKbR4Opkdr1JwN7qxCSUDM6HWNxg/VVxtUOiL6qlnzdLv0 lNk5bQFuC7pigTYumDEC514Pe9/5+fMdnH2bLiYnZMc2l3UrGlMs1O0TRjxKwiSG8t/J RkkQd1SPnKxhqTlvCEmq74JWOdhJSRNMicYJ8= MIME-Version: 1.0 Received: by 10.43.64.10 with SMTP id xg10mr4883021icb.47.1299531935792; Mon, 07 Mar 2011 13:05:35 -0800 (PST) Received: by 10.42.231.6 with HTTP; Mon, 7 Mar 2011 13:05:35 -0800 (PST) In-Reply-To: References: Date: Mon, 7 Mar 2011 13:05:35 -0800 Message-ID: Subject: Re: File access pattern on HDFS? From: Gautam Singaraju To: common-dev@hadoop.apache.org Cc: Dhruba Borthakur Content-Type: multipart/alternative; boundary=bcaec51a8b0a683fd5049deadbb6 --bcaec51a8b0a683fd5049deadbb6 Content-Type: text/plain; charset=ISO-8859-1 HDFS-1179: is exactly what I was looking for. Would it be a good idea to transmit info over TCP/UDP? --- Gautam On Mon, Mar 7, 2011 at 11:46 AM, Dhruba Borthakur wrote: > Here is a JIRA that talks about a file-change-log (but no work has been > done > yet) > > http://issues.apache.org/jira/browse/HDFS-1179 > > thanks, > dhruba > > On Mon, Mar 7, 2011 at 1:24 AM, Harsh J wrote: > > > There is no such information (history of atime changes, although atime > > is held for every file in the NN) held by the NameNode right now. I > > think HDFS-782 is slightly relevant to maintaining a 'hot-zone' info, > > although at a block level and among datanodes. I couldn't find a jira > > that talks about keeping a list of atime modifications on the > > NameNode. > > > > On Mon, Mar 7, 2011 at 4:00 AM, Gautam Singaraju > > wrote: > > > Hi, > > > > > > Is there a mechanism to get the list of files accessed on HDFS at the > > > NameNode? > > > Thanks! > > > --- > > > Gautam > > > > > > > > > > > -- > > Harsh J > > www.harshj.com > > > > > > -- > Connect to me at http://www.facebook.com/dhruba > --bcaec51a8b0a683fd5049deadbb6--