Re: Help with computing dump cycle
On Wed, Jul 14, 2004 at 06:20:36AM +0800, Jay Ted wrote: > Hello, > > I need help on figuring out how to set up the dump cycle. The way I have previously done backups is a full dump on Friday night with incremental dumps Saturday through Thursday. I keep > the full dumps for the past 5 Fridays, and full dumps done on the last Friday of the previous 3 months. I short, I want to have the ability to restore a system to its previous state for the last 7 > days, 5 weeks, and 3 months. I have an Powervault 120T/DLT7000 that holds 7 tapes. With compression off each tape holds about 35G. A full dump of all of my systems uncompressed > will fill nearly 6 tapes. I have plenty of tapes to swap out all tapes daily. Is there an easy way to set amanda.conf up to backup like this in only one configuration? Or do I need multiple > configs? I have already read the Amanda chapter of the O'Reilly Backup book. I would just like to see someone's example config who may be doing something similar to what I am trying to do. > If you always do what you've always done, you will always have what you've always had. Consider trying the scheduling that amanda was designed to do. Namely it decides which days each disklist entry (DLE, nominally a file system) receives a level 0 and what incremental it gets other days. The aim is to have the administrator give broad specs, as in maximum time between level 0's for each DLE, and let amanda worry about the specifics. When balanced, amanda will be able to backup about the same amount of data (as in tape usage) each dump run. No one hour backups Sat-Thur and twelve hours on Fri, but two hours nightly. I started out with a 1 week dumpcycle for everything and later fine tuned some DLE's to only doing the level 0's, never any incrementals as they never seem to change, others extended to 2 weeks with incrementals too, and some shortened them to 3 days as they vary more rapidly and I wanted the level 0's closer together. jl -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 4455 Province Line Road(609) 252-0159 Princeton, NJ 08540-4322 (609) 683-7220 (fax)
Re: Help with computing dump cycle
On Wed, 14 Jul 2004 at 6:20am, Jay Ted wrote > I need help on figuring out how to set up the dump cycle. The way I have previously > done backups is a full dump on Friday night with incremental dumps Saturday through > Thursday. I keep > the full dumps for the past 5 Fridays, and full dumps done on the last Friday of the > previous 3 months. I short, I want to have the ability to restore a system to its > previous state for the last 7 > days, 5 weeks, and 3 months. I have an Powervault 120T/DLT7000 that holds 7 tapes. > With compression off each tape holds about 35G. A full dump of all of my systems > uncompressed > will fill nearly 6 tapes. I have plenty of tapes to swap out all tapes daily. Is > there an easy way to set amanda.conf up to backup like this in only one > configuration? Or do I need multiple > configs? I have already read the Amanda chapter of the O'Reilly Backup book. I > would just like to see someone's example config who may be doing something similar > to what I am trying to > do. First, please fix your line lengths. It makes it rather hard to read. Reading the list archives, you'll see that forcing amanda into such a fixed schedule is rather difficult, and somewhat frowned upon. Amanda likes to do its own scheduling, with the goal of eqaulizing the night's backups. How many tapes do you have? If you have 7 days*12 weeks=84 tapes, you can have 3 months worth of history to the daily level, with several level 0s of each filesystem spread throughout your tapes. This is the easiest option, requiring only one config. You could do, e.g., dumpcycle=12 days, runspercycle=12, tapecycle=84. If you have 7 days*5 weeks=35 tapes + 6 tapes*3 months=18 for a total of 53 tapes, you could do 5 weeks worth of history to the daily level plus a separate config doing level 0s of everything once a month. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
Help with computing dump cycle
Hello, I need help on figuring out how to set up the dump cycle. The way I have previously done backups is a full dump on Friday night with incremental dumps Saturday through Thursday. I keep the full dumps for the past 5 Fridays, and full dumps done on the last Friday of the previous 3 months. I short, I want to have the ability to restore a system to its previous state for the last 7 days, 5 weeks, and 3 months. I have an Powervault 120T/DLT7000 that holds 7 tapes. With compression off each tape holds about 35G. A full dump of all of my systems uncompressed will fill nearly 6 tapes. I have plenty of tapes to swap out all tapes daily. Is there an easy way to set amanda.conf up to backup like this in only one configuration? Or do I need multiple configs? I have already read the Amanda chapter of the O'Reilly Backup book. I would just like to see someone's example config who may be doing something similar to what I am trying to do. Thanks! Jay -- __ Check out the latest SMS services @ http://www.linuxmail.org This allows you to send and receive SMS through your mailbox. Powered by Outblaze
