On Mon, Mar 3, 2008 at 7:56 AM, thomas <[EMAIL PROTECTED]> wrote: > Hi, > > we use bacula a long time(6 years) to backup linux and windows server. > It works create!!! > > Now one harddisk (Raid5) is defect in the bacula server and we consider > to buy a new server. > I think we can buy a large server with tapelibrary (DELL TL2000 LTO3). > > Our consideration are: > - We want to backup to disk > - We want hold the backups 7 days on Disk > - We want a full backup each day (300GB) > - We want each full harddisk backup are copied to a tape in the tapelibrary > > I think we will have a harddisk (RAID5) with 4,5 TB. > So we can hold a lot of full backups on harddisk. > 4500GB(total) - 300GB(one fullBCK) = 4200GB > 4200GB / 300GB = 14 days > > We know how to backup to tape, and we know how to backup to > volumes(filesystem). > > BUT, how can we backup to harddisk and then to tape in one backup job? > We dont want to run the same job twice with different device! > > The tapelibrary can hold 24 LTO3 (400/800GB) tapes. > So we have > 5 tapes = Daily > 4 tapes = weekly > 12 tapes = yearly > 3 tapes = manual backup > > Regards, > Thomas >
Sounds like you want to do some type of offsite vault job, but just dump from disk to tape. Honestly I think doing a full backup each day is just a waste of space, on tape and disk. You might want to consider maybe doing a full backup each week with incrementals in between. Maybe even setting up that once a week job to dump off onto tape instead of disk. Perhaps have the Full weekly's on tape and the incrementals on disk. For those quick restores or recoveries, you may only need to recover from disk for a quick restore, anything requiring more or a full recovery would require the tape, etc. I'm not sure how busy your systems are but 300GB full dump each day is just not a good way to setup backups. And even then, you may want to consider doing one full backup per month with differentials 3-4 other times with incrementals inbetween. this will save you time, money and resources for your backup needs. Your best option is to first determine how often your data changes. A good daily average that a lot of vendors will use is 3% daily change. Then determine what type of retention policy you want for your backups and each host. Some hosts may not need a year retention, some might. Some may only really require that you keep a month or less retention for. >From that, then take the best approach to backing up your data saving yourself that time, money and resources. A good backup solution and plan is like artwork, take the best approach that will make sense in the long run, not just what's convenient for you now. -Drew ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
