From mboxrd@z Thu Jan 1 00:00:00 1970 From: Somenath Ghosh Subject: about commit sector concept in journal Date: Fri, 11 Feb 2005 11:13:55 +0530 Message-ID: <20050211054355.GA4509@cmi.ac.in> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from ptil-26-4-chn.primus-india.net ([61.12.4.26]:4025 "EHLO hornbill.cmi.ac.in") by vger.kernel.org with ESMTP id S262179AbVBKFoA (ORCPT ); Fri, 11 Feb 2005 00:44:00 -0500 Received: from gaur.cmi.ac.in (root@gaur.cmi.ac.in [192.168.52.2]) by hornbill.cmi.ac.in (8.13.1/8.13.1/Debian-16) with ESMTP id j1B5huDr022149 for ; Fri, 11 Feb 2005 11:13:56 +0530 Received: from teak.cmi.ac.in (root@teak.cmi.ac.in [192.168.52.75]) by gaur.cmi.ac.in (8.12.11/8.12.11/Debian-3) with ESMTP id j1B5hunX027511 for ; Fri, 11 Feb 2005 11:13:56 +0530 Received: from teak.cmi.ac.in (somenath@localhost [127.0.0.1]) by teak.cmi.ac.in (8.13.1/8.13.1/Debian-16) with ESMTP id j1B5htRI004522 for ; Fri, 11 Feb 2005 11:13:55 +0530 Received: (from somenath@localhost) by teak.cmi.ac.in (8.13.1/8.13.1/Submit) id j1B5htrE004521 for linux-fsdevel@vger.kernel.org; Fri, 11 Feb 2005 11:13:55 +0530 To: linux-fsdevel@vger.kernel.org Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org i am reading the scheme by which journal works. i came to know that after every transaction writen to the log file a 512 byte sector is writen back to the disk. this is treated as a commit block, and there is some sequence number in there that matches with all the previous transaction has been done. but how it is possible i can't understand . please tell me about the proper scheme of the commit block. somenath