On Wed, Oct 09, 2013 at 06:27:48PM -0400, Michael Stauffer wrote: > Hi again, > > I've got another batch of questions while I consider switching to Amanda: > > 1) catalog (indecies) > It seems the main catalog/database is stored in the index files. Is it > straightforward to back these up? > This doc (http://www.zmanda.com/protecting-amanda-server.html) sugests > backing up these dirs/files to be able to restore an amanda > configuration (and presumably the backup catalog): /etc/amandates, > /etc/dumpdates, /etc/amanda, /var/lib/amanda.
There is no built-in way to do this in amanda. The problems are they are not complete, and changing, until the backup is done. Several members of this list have described their home-grown techniques. > > 2) Spanning and parts > Say I split my 32TB of data into DLE's of 2-3TB. > > a) If I set a 'part' size of 150GB (10% of native tape capacity is > what I saw recommended), what is the format of each part as it's > written? Is each part its own tarfile? Seems that would make it easier > to restore things manually. Traditional amanda tape files, holding the complete tar or dump archive, are a 32KB header followed by the archive. Manual restoration is done with dd to skip the header and pipe the rest to the appropriate command line to restore the data. The header contains information identifying the contents, how they were created, and when. Parts alter this scheme only slightly. Each part still has a header. The header now includes info on which sequential part it is. The part name also identifies it location in the sequence. The data is simply a chunk of the complete archive. Manual restoration again is strip the headers and pipe to the restore command. > > b) If a part spans two volumes, what's the format of that? Is it a > single tarfile that's split in two? A part will NOT span two volumes. If the end of the media is reached, the part is restarted on the next volume. > > c) What's the manual restore process for such a spanned part? cat the > two parts together and pipe to tar for extraction? > > 3) Restoring w/out Amanda > I thought data was written to tape as tar files. But this page > suggests a dumpfile is only readable by Amanda apps. Is a dumpfile > something else? > http://wiki.zmanda.com/index.php/Dumpfile I think the author meant there are no "standard unix/linux" commands that know the header + data layout. The dumpfiles can be handled with amanda commands or as described above, the operator can use standard commands when armed with knowledge of the layout. > > 4) holding disk and flushing > I see how flushing can be forced when the holding disk has a certain % > of tape size. > Can a flush be forced every N days? The idea here would be to get data > to tape at a min of every week or so, should successive incrementals > be small. Dumping to holding disk without taping can be done. Then have a crontable entry to flush when you want. This can done with a separate amflush command, or by varying amdump options. > > 5) alerting > Is there a provision for email and/or other alerts on job completion > or error, etc? > Most amanda admins have an amreport emailed to them at amdump or amflush completion. As the cron entry can be a shell script, you could customize greatly. Jon -- Jon H. LaBadie [email protected] 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (609) 477-8330 (C)
