Hi Jdd, jdd wrote:
Eberhard Roloff wrote:
rsnapshot, doing backups to usb-drive(s)? ;-)
backup forn home user can only be acheived on a one by one thinking.
let me give an example:
my son spend much time downloading films and games from the net (I know it's not fair, but are your sure your son don't?)
Currently he is five years old, but that will change ;-))) - it's just an example
He got a 200Gb internal drive.
ok! If that is the only drive he has, I doubt that all 200GB are "data" in the sense of "valuable data that you definitely do not want to loose". However, for purposes of simplicity, lets assume that your son has data with a volume of 200GB (or less), that needs to be backed up regularly.
If I had to backup all and every file on his computer, I should have 100 Tb of usb drives... You might have ignored the essence of rsnapshot and similar solutions. The beauty of these solutions is that backups are done by using symlinks.
Lets see how this basically works and what you get as a result: ===This is how it works:===== (assuming that you are doing a simple daily backup. In reality, you most probably will want to do weekly and monthly backups, as well) : day1: 200GB are backed up to the usb drive day2: just the difference from day2 to day1 is backed up to the usbdrive day3: just the difference from day3 to day2 is backed up to the usbdrive day4: just the difference, you guess it. ... In fact that means that your usb drive will "only" need to accomodate 200GB+ "a little more". Ex 300GB will most likely do for a VERY long time. Now comes the magic! ====This is how it looks like on your usb-drive with Konqueror===== root of usbdrive -folder "day1", including all the data from day1 -folder "day2", including all the data that you had (saved) on day 2 -folder "day3", including, all the data that you had (saved) on day 3 -folder "day4", you guess it.... ... As a result, --you will have a full week of daily backups that you can restore from, either on a per file basis or as a whole. --But you only need to accomodate your data size plus "slightly more", because the "full backup any day" is done by using symlinks, so you profit from the fact, that a very lare percentage of your data will most likely be identical from a given day to the next..... Now compare this to a more conventional backup strategy of doing a real "full backup any day", where you need to accomodate space that you will easily and frustratingly multiply on your own. And compare to the convential method of doing a full backup, followed by "differential" backups. This will save you space but you will stop to like it in the case a restore will be needed. ;-))
to have consistent backup, one must look at his own kind of work.
Definitely!
rigth now I work mostly by browser on a web site not of my own. Hope simply the owner makes a backup. On an other site I'm the owner, but my work is on pmwiki, very small flat files app. The hole web site is under 100Mo and the usefull pmwiki less than 10Mb, so tar file copied on ma server account and on my persobnal computer. very soon, I will have a rsync system, no need of diff...
That's ok, as long as it is working for you. Btw. rsnapshot is in fact rsync, with the added benefit that you do not need to care on your own for multiple generations of your rsynced data.
I try to keep my data folders under 4Gb large and write them to dvd frequently
all the other data is saved when created.
and my personal data (photos...) are duplicated on web servers, free from fire or water.
That's much better since a local backup solution will hardly be protected against fire, water or theft.... I never intended to indicate that rsnapshot (and other solutions like this) are the cure for any given backup problem. They are not! And there is much more to a professional backup strategy than an usb-disk ;-)))) However I use it and have found it beneficial for my given problem that I wanted to have a cheap, quick, automated backup at home, that saves space and executes my backups locally to a locally attached usb-disk. Kind regards Eberhard -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org