Return-Path: Delivered-To: apmail-hadoop-common-issues-archive@minotaur.apache.org Received: (qmail 42689 invoked from network); 22 Nov 2010 19:57:10 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 22 Nov 2010 19:57:10 -0000 Received: (qmail 49681 invoked by uid 500); 22 Nov 2010 19:57:42 -0000 Delivered-To: apmail-hadoop-common-issues-archive@hadoop.apache.org Received: (qmail 49649 invoked by uid 500); 22 Nov 2010 19:57:42 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-issues@hadoop.apache.org Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 49641 invoked by uid 99); 22 Nov 2010 19:57:42 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Nov 2010 19:57:42 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.22] (HELO thor.apache.org) (140.211.11.22) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Nov 2010 19:57:41 +0000 Received: from thor (localhost [127.0.0.1]) by thor.apache.org (8.13.8+Sun/8.13.8) with ESMTP id oAMJvJdA018974 for ; Mon, 22 Nov 2010 19:57:20 GMT Message-ID: <16367424.239921290455839567.JavaMail.jira@thor> Date: Mon, 22 Nov 2010 14:57:19 -0500 (EST) From: "Doug Cutting (JIRA)" To: common-issues@hadoop.apache.org Subject: [jira] Commented: (HADOOP-6685) Change the generic serialization framework API to use serialization-specific bytes instead of Map for configuration MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HADOOP-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12934571#action_12934571 ] Doug Cutting commented on HADOOP-6685: -------------------------------------- Tom> I actually prefer strings in serialization (HADOOP-6420), but am prepared to compromise over it [ ... ] I wonder if JSON might be a good nestable format for serialization metadata? JSON supports nesting, and distinguishes numeric, boolean and string types. With Jackson, one can serialize and deserialize Java objects as JSON, to get compile-time type checking. > Change the generic serialization framework API to use serialization-specific bytes instead of Map for configuration > ---------------------------------------------------------------------------------------------------------------------------------- > > Key: HADOOP-6685 > URL: https://issues.apache.org/jira/browse/HADOOP-6685 > Project: Hadoop Common > Issue Type: Improvement > Reporter: Owen O'Malley > Assignee: Owen O'Malley > Fix For: 0.22.0 > > Attachments: libthrift.jar, serial.patch, serial4.patch, serial6.patch, serial7.patch, SerializationAtSummit.pdf > > > Currently, the generic serialization framework uses Map for the serialization specific configuration. Since this data is really internal to the specific serialization, I think we should change it to be an opaque binary blob. This will simplify the interface for defining specific serializations for different contexts (MAPREDUCE-1462). It will also move us toward having serialized objects for Mappers, Reducers, etc (MAPREDUCE-1183). -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.