Return-Path: Delivered-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Received: (qmail 17099 invoked from network); 9 Jun 2010 09:57:44 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 9 Jun 2010 09:57:44 -0000 Received: (qmail 94353 invoked by uid 500); 9 Jun 2010 09:57:43 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 93912 invoked by uid 500); 9 Jun 2010 09:57:40 -0000 Mailing-List: contact hdfs-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-user@hadoop.apache.org Delivered-To: mailing list hdfs-user@hadoop.apache.org Received: (qmail 93904 invoked by uid 99); 9 Jun 2010 09:57:39 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Jun 2010 09:57:39 +0000 X-ASF-Spam-Status: No, hits=0.7 required=10.0 tests=AWL,FREEMAIL_FROM,HK_RANDOM_ENVFROM,HK_RANDOM_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of zjffdu@gmail.com designates 209.85.160.48 as permitted sender) Received: from [209.85.160.48] (HELO mail-pw0-f48.google.com) (209.85.160.48) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Jun 2010 09:57:33 +0000 Received: by pwj7 with SMTP id 7so725276pwj.35 for ; Wed, 09 Jun 2010 02:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=3Ua38v5HbpaFx+T6Y76FstV19/0hQIMXh9k+ysZYfac=; b=RJDZIIUs/mzEWTNQAIKQkxR5BeRrAjXv96mBDJYzsB919ob7AMbGuq/fFlSsuethx+ J3xlcM7nt6Y+pa3fpB3bwJu40oxfvD36spsYBasFGSFX/yskZ5eMncVIxbGcfQP9RSQ5 GJ3zAI7ocPuy0EnqyzQzoSBmctdFE/O9k7Rno= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=AqTKVu1pgjImKb0TZBScnQ7+1VK/GbQ/zy3Sx+ETxrCLbzRWKSpzFV4ftmXh20ZmoG nit7UcNKg5grbFSoCPwRd5afW6AFaMoXLRD7vI9V9XPYEVhuWK0mL9smzYBwJeuYwC6T 8e+u/rgZdJmtdK+Ava405CXX+VlfaZX9xvt1o= MIME-Version: 1.0 Received: by 10.142.10.8 with SMTP id 8mr12839201wfj.56.1276077433120; Wed, 09 Jun 2010 02:57:13 -0700 (PDT) Received: by 10.142.215.20 with HTTP; Wed, 9 Jun 2010 02:57:13 -0700 (PDT) Date: Wed, 9 Jun 2010 17:57:13 +0800 Message-ID: Subject: Is there any method to estimate how many files metadata I can store in name node ? From: Jeff Zhang To: hdfs-user@hadoop.apache.org Content-Type: text/plain; charset=UTF-8 Hi all, I'd like to estimate how many files I can store in the my name node with 8G memory, Is there any estimation method ? -- Best Regards Jeff Zhang