Yes, you are right. I was trying to say that based on what you wrote, you might be able to accomplish the same thing a different way. I don't have an answer for your exact question, just trying to help.
Here is my thinking: The point is that as long as there is a full backup on Friday, none of your diff backups will run on Saturday anyway - your tape drive is still busy with the Friday backup. You have machine 1, machine 2, machine 3 and machine 4 to back up. You want a full backup to happen once per month on a Friday, and a differential backup of all the other machines on a Saturday. But unless you have multiple volumes (or allow concurrent backups), that schedule is not going to happen in the first place - the backups all execute consecutively. So according to your plan, you schedule a full backup of Machine 1 on the first Friday 22:05, and a diff backup of machines 2, 3 and 4 on Saturday 22:05. What's really going to happen is that the backup for Machine 1 takes, say, 30 hours. So the diff backup for Machine 2 actually starts on Sunday morning, 4 AM. The diff backup takes 12 hours. So Machine 3's diff backup doesn't even start until Sunday afternoon. And that's true regardless of whether your schedule calls for Saturday 22:05 PM, or Friday, 22:10 PM. So there really is no reason to schedule on the Saturday in the first place. Again, concurrency could throw a monkeywrench into that plan (although I think priorities should still keep it working the same way) Kevin Keane The NetTech (North County Tech Center, LLC dba The NetTech) 760-721-8339 http://www.4nettech.com -----Original Message----- From: hymie! [mailto:hy...@lactose.homelinux.net] Sent: Monday, April 25, 2011 12:03 PM To: Kevin Keane Cc: bacula-users@lists.sourceforge.net; hy...@lactose.homelinux.net Subject: Re: [Bacula-users] friday vs saturday Kevin Keane writes: >How is your concurrency configured? If you only have one concurrent >job, the a ctual dates you have in your schedule aren't related to >reality in the first p lace. If that is your configuration, your >backups aren't going to run on Satur day anyway, but on Sunday or >whenever the full backups are finished. That mean s that the exact time >you schedule the differentials doesn't matter. Just sche dule them to >start five minutes after the fulls (at 22:10), and with a lower p riority. I think you missed the point of my question. That's probably my fault, for being too verbose. But my question was, how do I * schedule a full backup on a specific Friday * schedule differential backups on Saturdays * * but not the day immediately after a full backup ? >-----Original Message----- >From: hymie! [mailto:hy...@lactose.homelinux.net] >Sent: Monday, April 25, 2011 9:43 AM >To: bacula-users@lists.sourceforge.net >Subject: [Bacula-users] friday vs saturday > > >So I have four machines whose full backups take more than 24 hours. >As an additional problem, one of those 4 machines takes 12 hours just >to do an Incremental/Differential backup. (The full backup takes 43 >hours.) > >I had the idea that I would assign each machine its own Friday to do a >full ba ckup, where no other backups would take place. Then on >Saturday, each of the machines that didn't just do a full backup would >do a Differential backup. Fi nally, incrementals the rest of the week. > >I was just about to set up schedules for these boxes that look >something like >this: > >Schedule { > Name = "1stFridayFull" > Run = Full 1st fri at 22:05 > Run = Differential 2nd-5th sat at 22:05 > Run = Incremental sun-thu at 22:05 >} >Schedule { > Name = "2ndFridayFull" > Run = Full 2nd fri at 22:05 > Run = Differential 1st sat at 22:05 > Run = Differential 3nd-5th sat at 22:05 > Run = Incremental sun-thu at 22:05 >} > >But then I realized -- sometimes, the day after the 1st Friday is the >2nd Satu rday. > >(caution: monospaced font ahead) > October 2011 >Su Mo Tu We Th Fr Sa > 1 > 2 3 4 5 6 7 8 > 9 10 11 12 13 14 15 >16 17 18 19 20 21 22 >23 24 25 26 27 28 29 >30 31 > >So it seems that, on Fri 7 October, my 1stFriFull machine will do a >full backu p; on Sat 8 October, that same machine will do a Differential >backup. > >Meanwhile, my 2ndFriFull machine will do a Differential on Sat 1 >October, incr ementals during the week, nothing at all on the 7th or >8th, more incrementals, before finally doing a Full backup on the 14th... >again followed immediately by a Differential backup on the 15th. > >Is there a way to avoid this problem and accomplish what I want to accomplish? > The only thing that comes to mind is with unusual time math, such as >schedul eing my Differential backups for Friday at 46:05; but I doubt >that Bacula supp orts this. > >--hymie! http://lactose.homelinux.net/~hymie hy...@lactose.homelinux.net >----------------------------------------------------------------------- >------- ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. 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