Hi, I have an "interesting" problem, regarding checksumming a large number of big files prior to a storage migration.
We have a fairly old install of Bacula, v1.36, running on Redhat Enterprise Linux v3, with a MySQL 3.23 database. We are shortly going to upgrade our storage system. I want to check for bit-rot before commencing the migration. Bacula seems to have some checksums stored, so lets use them! To complicate things, many files have been moved around, in order optimise use of different storage media. We have some scripts which ensure Bacula backs-up the correct files, and doesn't double back-up big files. But this means that the paths in the catalog don't match the paths on disk. It seems like the checksumming and base64 encoding in the version of Bacula we have is broken. We can't just run "md5sum" on the command line and compare against what's in the Catalog. The bug report for this is here (fixed in newer releases): http://bugs.bacula.org/bug_view_advanced_page.php?bug_id=0000565 My first thought was to set up a "Verify" task in our current configuration, and get Bacula to natively check the files against the disk. It shouldn't matter that the encoding is broken, since we will be using the same (broken) code for verification. But when I do this, it complains that there has been no "InitCatalog" task done. I'm not sure whether this is related to our file moves, or because we intially misconfgiured things. I guess we should have been checking this functionality from the start :-( Some questions: 1) Are the checksums stored in Bacula any use to me at all? 2) Can I set up a "Verify" task, and compare the stored checksums against the disk copies? Or is this going to be too hard, given that the InitCatalog jobs was never run, and we have moved files around? 3) Can I write a command line checksum program, which will output checksums, and encode them in a way I can compare with the catalog? How can I do this in Perl, or C? I've had a look at the internals of the Bacula libraries, and my meager C skills are not sufficient to work things out. (This is my preferred option) Thanks, -- Jon Wilson <[EMAIL PROTECTED]> Systems Administration Manager PO Box H58, Australia Square, Sydney NSW 1215 Level 2, 9 Castlereagh Street, Sydney Office Tel:+61 9231 5888 Direct Tel:+61 2 9236 9118 Fax: +61 2 9231 5988 www.sirca.org.au DISCLAIMER: The contents of this email, inclusive of attachments, may be legally privileged and confidential. Any unauthorised use of the contents is expressly prohibited. If you have received this email message in error or are not the intended recipient, you should destroy the message along with any attachment(s). Unintended recipients of this email are prohibited from retaining, disclosing, distributing or using any information herein. This email is also subject to copyright. No part of it should be reproduced, adapted or transmitted without the written consent of the copyright owner. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
