Return-Path: X-Original-To: apmail-hadoop-common-user-archive@www.apache.org Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 8C95F73CB for ; Sat, 19 Nov 2011 09:16:08 +0000 (UTC) Received: (qmail 85924 invoked by uid 500); 19 Nov 2011 09:16:05 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 85848 invoked by uid 500); 19 Nov 2011 09:16:05 -0000 Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-user@hadoop.apache.org Delivered-To: mailing list common-user@hadoop.apache.org Received: (qmail 85834 invoked by uid 99); 19 Nov 2011 09:16:05 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 19 Nov 2011 09:16:05 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of harsh@cloudera.com designates 209.85.210.176 as permitted sender) Received: from [209.85.210.176] (HELO mail-iy0-f176.google.com) (209.85.210.176) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 19 Nov 2011 09:15:57 +0000 Received: by iakh37 with SMTP id h37so6530479iak.35 for ; Sat, 19 Nov 2011 01:15:36 -0800 (PST) Received: by 10.42.135.66 with SMTP id o2mr6180138ict.0.1321694136679; Sat, 19 Nov 2011 01:15:36 -0800 (PST) Received: from [192.168.1.23] ([59.92.62.52]) by mx.google.com with ESMTPS id g16sm14320620ibs.8.2011.11.19.01.15.33 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 19 Nov 2011 01:15:35 -0800 (PST) Subject: Re: How many files can a hdfs client can access simultaneously Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Harsh J In-Reply-To: Date: Sat, 19 Nov 2011 14:45:24 +0530 Cc: hdfs-user@hadoop.apache.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <8619A7C1-7771-40D5-9F10-FB16949A6D2C@cloudera.com> To: common-user@hadoop.apache.org X-Mailer: Apple Mail (2.1084) X-Virus-Checked: Checked by ClamAV on apache.org Oops, s/you're/you. I rephrased half-way. On 19-Nov-2011, at 2:02 PM, kartheek muthyala wrote: > Thanks harsh for the confirmation and for referring me to this dl. :) >=20 > On Sat, Nov 19, 2011 at 12:20 PM, Harsh J wrote: >=20 >> Kartheek, >>=20 >> (Moving to hdfs-user@. Bcc'd common-user@. Please use the right lists = for >> reaching to the proper audience :)) >>=20 >> Writing multiple files from a single DFS client instance should not = be a >> problem at all. You get one output stream per file creation, leaving = you're >> free to write to a number of them in parallel and to also expect an = amount >> of gain. >>=20 >> On 19-Nov-2011, at 11:26 AM, kartheek muthyala wrote: >>=20 >>> Hi all, >>> I know that while writing the file, a hdfs client writes the blocks = in >>> sequential fashion, writing one block only at one time and when this >> block >>> is acknowledged as a complete write then the next block write = happens. >> But >>> can a hdfs client write two or three files at a same time, ideally = it >>> should do, can i get a confirmation on this? >>> ~Kartheek >>=20 >>=20