Benoit BELY wrote: > > > 2007/4/30, Johan Ehnberg <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>: > > Benoit BELY wrote: > > Hi, > > > > Someone could (or try) explain to me this strange thing??? > > > > I looked for disk space with unix command df : > > > df -h > > File system Size Occ Free %Occ Mount > > /dev/sda6 1,1T 135G 920G 13% /var > > > > But when I read "BackupPC : Host Summary. > > > > 47 full backups of total size 1384.71 Go (prior to pooling and > compression) > > 72 inc backups of total size 65.73 Go (prior to pooling and > compression) > > > > I don't unterstand what's happen, I must have a full device, but only > > 135Go seems to be occupated. > > > > Someone have an idea !!! > > > > Hi! > > Those numbers are before pooling and compression, which leads us to > these features: > > BackupPC uses compression, so if the data compresses well, you'll have > less on your disk. > > It also uses pooling, so if many files are identical, they will be > written only once on the disk, again reducing real disk usage. > > If you are unsure, try restoring and verifying the data. (You should > always do that in a production system anyway!) > > Regards, > Johan > > -- > Johan Ehnberg > > Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > GSM: +358503209688 > WWW: http://www.ehnberg.net/johan/ > > > > I'm surprising, the rate of compression and pool is around 10 1350 Go > give 135 Go. > Do you think it's normal rate??? > I heard it should be around 5 or 6 but 10 seems to be large rate for me. > > Best regards >
Well, if you keep a long trail of Full backups, these also may increase the historical load of backups, without actually increasing on disk. That's the same thing as "identical files" in my last answer. This is because of hard-linking in a filesystem. In other words: when you want the same file in two different locations (backups) BackupPC just tells the operating system to make them point at the same data on disk. Please note I'm new with BackupPC myself so unless you're going to verify the data with what I am saying, don't hold me responsable :). /johan ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
