Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id D7A9D9246 for ; Wed, 21 Sep 2011 21:00:08 +0000 (UTC) Received: (qmail 69529 invoked by uid 500); 21 Sep 2011 21:00:08 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 69430 invoked by uid 500); 21 Sep 2011 21:00:07 -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 69415 invoked by uid 99); 21 Sep 2011 21:00:07 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 21 Sep 2011 21:00:07 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [209.85.215.176] (HELO mail-ey0-f176.google.com) (209.85.215.176) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 21 Sep 2011 21:00:00 +0000 Received: by eyb7 with SMTP id 7so1924411eyb.35 for ; Wed, 21 Sep 2011 13:59:40 -0700 (PDT) MIME-Version: 1.0 Received: by 10.216.229.214 with SMTP id h64mr2658522weq.68.1316638780200; Wed, 21 Sep 2011 13:59:40 -0700 (PDT) Received: by 10.216.8.14 with HTTP; Wed, 21 Sep 2011 13:59:40 -0700 (PDT) X-Originating-IP: [68.174.86.201] In-Reply-To: References: <001201cc7829$68ad93a0$3a08bae0$@xa.allyes.com> Date: Wed, 21 Sep 2011 16:59:40 -0400 Message-ID: Subject: Re: A question about RPC From: Koert Kuipers To: hdfs-user@hadoop.apache.org Content-Type: multipart/alternative; boundary=0016364c7955ca97cf04ad79da94 X-Virus-Checked: Checked by ClamAV on apache.org --0016364c7955ca97cf04ad79da94 Content-Type: text/plain; charset=ISO-8859-1 i would love an IDL, plus that modern serialization frameworks such as protobuf/thrift support versioning (although i still have issues with different versions of thrift not working nicely together, argh why is that). the only downside is perhaps that they are a little slower than writables. On Wed, Sep 21, 2011 at 3:12 AM, Uma Maheswara Rao G 72686 < maheswara@huawei.com> wrote: > Hadoop has its RPC machanism mainly Writables to overcome some of the > disadvantages on normal serializations. > For more info: > http://www.lexemetech.com/2008/07/rpc-and-serialization-with-hadoop.html > > Regards, > Uma > ----- Original Message ----- > From: jie_zhou > Date: Wednesday, September 21, 2011 12:12 pm > Subject: A question about RPC > To: hdfs-user@hadoop.apache.org > > > Dear: > > > > Nice to meet you! > > > > I am a beginner of hadoop. Recently, I have seen the source of RPC of > > hadoop,but now I have a question. As we know,hadoop RPC make use > > of Dynamic > > proxy mechanism ,but > > > > why not use IDL such as CORBA, or AIDL of Android? > > > > Thanks for your early reply. > > > > Best Regards, > > > > jie > > > > > > > > > > > > > > > > > > > > > --0016364c7955ca97cf04ad79da94 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable i would love an IDL, plus that modern serialization frameworks such as prot= obuf/thrift support versioning (although i still have issues with different= versions of thrift not working nicely together, argh why is that). the onl= y downside is perhaps that they are a little slower than writables.

On Wed, Sep 21, 2011 at 3:12 AM, Uma Maheswa= ra Rao G 72686 <maheswara@huawei.com> wrote:
Hadoop has its RPC machanism mainly Writables to overcome some of the disad= vantages on normal serializations.
For more info:
=A0http://www.lexemetech.com/2008/07/rpc-and-s= erialization-with-hadoop.html

Regards,
Uma
----- Original Message -----
From: jie_zhou <jie_zhou@xa.al= lyes.com>
Date: Wednesday, September 21, 2011 12:12 pm
Subject: A question about RPC
To: hdfs-user@hadoop.apache.= org

> Dear:
>
> Nice to meet you!
>
> I am a beginner of hadoop. Recently, I have seen the source of RPC of<= br> > hadoop,but now I have a question. As we know,hadoop RPC make use
> of Dynamic
> proxy mechanism ,but
>
> why not use IDL such as CORBA, or AIDL of Android?
>
> Thanks for your early reply.
>
> Best Regards,
>
> jie
>
>
>
>
>
>
>
>
>
>

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