Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 2459 invoked from network); 6 May 2010 17:42:21 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 6 May 2010 17:42:21 -0000 Received: (qmail 76469 invoked by uid 500); 6 May 2010 17:42:21 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 76423 invoked by uid 500); 6 May 2010 17:42:20 -0000 Mailing-List: contact zookeeper-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: zookeeper-user@hadoop.apache.org Delivered-To: mailing list zookeeper-user@hadoop.apache.org Received: (qmail 76228 invoked by uid 99); 6 May 2010 17:42:20 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 May 2010 17:42:20 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=AWL,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of dorserg@gmail.com designates 209.85.210.172 as permitted sender) Received: from [209.85.210.172] (HELO mail-yx0-f172.google.com) (209.85.210.172) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 May 2010 17:42:14 +0000 Received: by yxe2 with SMTP id 2so178031yxe.2 for ; Thu, 06 May 2010 10:41:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=CWaVkI/7nVCQb++quIkQxCuT0MZM3kY+VBiVVqw+8O8=; b=W6oFGI9tz+dRAf0Wgda+YQVtapDGRAO2GT5jH0CzZJT3ZYX6o3H8+OYcUXNNsZ16iM No1s5j7Hl2QZGeEZr/AlnG+oYCxQaEIJErS4GN59GyDiXMnygG+geo6So+uhQwVuISvj +uOB4O1txW7TZVqzsQ+F95sbw103ayQpg2Wlw= 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 :content-type; b=VY9sGQcDHJMWvoWAnksZDW6kEKQcBt1VB9kCygmUHPW9ug46RrkoG6h+qU3NQEIuqN 9XyZvzj9OHnyOcpzTLmZQt6JhgrQqBiKxqQfAvark+la8SSFnpZIo5oINRPzxqrsgKZL p/pzmp6rvu8k3sIWJ3CHEacjyJf7wIIlgyZJA= MIME-Version: 1.0 Received: by 10.101.175.2 with SMTP id c2mr8828827anp.226.1273167713210; Thu, 06 May 2010 10:41:53 -0700 (PDT) Received: by 10.100.120.7 with HTTP; Thu, 6 May 2010 10:41:53 -0700 (PDT) In-Reply-To: References: Date: Thu, 6 May 2010 20:41:53 +0300 Message-ID: Subject: Re: [GSoC 2010] Zookeeper Read-Only Mode From: Sergey Doroshenko To: zookeeper-dev , zookeeper-user Content-Type: multipart/alternative; boundary=001636c9293c4913020485f07580 --001636c9293c4913020485f07580 Content-Type: text/plain; charset=ISO-8859-1 I created a wiki page that outlines how I'm thinking to implement read-only mode: http://wiki.apache.org/hadoop/ZooKeeper/GSoCReadOnlyMode This feature can change both client library and server side, and before implementing it, it would be great to hear some feedback from the community. I'd like to ask ZK developers what do they think about current approach, and ask ZK users to also share their thoughts, use cases where read-only mode would be beneficial and how current approach fits to them and so on. P.S. For zookeeper-user@ subscribers who didn't previously see this email: I'm Sergey Doroshenko, accepted GSoC-2010 applicant, and I'll be implementing read-only mode for Zookeeper. Any feedback is greatly appreciated and would be really helpful. On Mon, Apr 19, 2010 at 5:51 PM, Vishal K wrote: > Hi Sergey, > > This is a very useful feature. We would be happy to have it on our cluster. > > One small suggestion - It will be nice if you could document things along > the way while going through the ZK code or testing ZK behavior. > Since it will cover one of the core logic of ZK it will helpful to other > contributors as well. > > Thanks. > > Regards, > -Vishal > > On Fri, Apr 16, 2010 at 6:43 PM, Sergey Doroshenko >wrote: > > > Hi, > > I'm Sergey Doroshenko, GSoC applicant, and I've submitted application for > > enabling read-only mode in Zookeeper. > > > > I worked with Zookeeper during my internship this winter, and liked it > > much. > > Now I'm very eager to contribute to it. > > > > Task for enabling read-only mode in ZK ( > > https://issues.apache.org/jira/browse/ZOOKEEPER-704) looks interesting > > and, > > as we discussed with Henry, has quite practical importance. > > Please check my proposal here: > > http://docs.google.com/View?id=dghqvqdd_51ffvhcsdb , > > and let me know if you have some thoughts or suggestions about it. > > > > Thanks! > > > > -- > > Regards, Sergey > > > -- Regards, Sergey --001636c9293c4913020485f07580--