From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id j3JH8kO31149 for ; Tue, 19 Apr 2005 13:08:46 -0400 Received: from ithilien.qualcomm.com (ithilien.qualcomm.com [129.46.51.59]) by mx3.redhat.com (8.12.11/8.12.11) with ESMTP id j3JH8dpp017032 for ; Tue, 19 Apr 2005 13:08:40 -0400 Received: from crowley.qualcomm.com (crowley.qualcomm.com [129.46.61.151]) by ithilien.qualcomm.com (8.12.10/8.12.5/1.0) with ESMTP id j3JH8WHa002443 for ; Tue, 19 Apr 2005 10:08:32 -0700 (PDT) Received: from a64.davidb.org (xing.qualcomm.com [129.46.50.100]) by crowley.qualcomm.com (8.12.10/8.12.5/1.0) with ESMTP id j3JH8TIT004406 for ; Tue, 19 Apr 2005 10:08:30 -0700 (PDT) Date: Tue, 19 Apr 2005 10:08:27 -0700 From: "David Brown" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID: Subject: [linux-lvm] Snapshots and mmaped files. Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; format="flowed"; delsp="yes"; charset="us-ascii" To: linux-lvm@redhat.com I'm using lvm2 snapshots to do backups of several machines. (lvm2 2.00.33, device-mapper 1.01.00, ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.9/2.6.9-udm1.tar.bz2 minus patch 13) (I've tried some newer patches, without success, but that'll be a separate mail). The problem shows up with files that contains Berkeley databases. These files seem to be modified on both the original and the snapshot. They show up in my 'var' partition with imapd, and exim, and anything else that has a berkeley database opened, and modifies the file after the snapshot is taken. The mtime of the file is not modified, only the contents. I suspect that if one side grew, then the size change would not be affected. Thanks, David Brown