Well unless someone is working on a sub-file deduplication engine your dedup rates are not gonna change. The only thing you can do to pump up your numbers is make every backup a full backup so your "source data size" increments at a greater rate while your "stored data size" only increases by the changed data. You can also backup more clients with duplicate data (a 100 WinTel boxes with 8GB of duplicated OS / box ought to do it).
Example: Full backup = 100GB, Incremental [10% Rate of Change] = 10 GB Full + Incremental: 1 Full + 6 Incremental yields 100 + 60 or 160 GB of source and stored data. Your ratio is going to remain 1:1 unless you have duplicated data on your system or your continously adding and removing the same file. 7 Full Backups: 7 Full + 0 Incremental yields 700 + 0 or 700GB of source, but only 160GB of stored. Your ratio is 4.375:1. This assumes that for every GB of change you removed the GB of source (ie turnover). If your increasing the Full Amount by 10% each time (assumes you delete nothing) then the numbers look like: 100 + 110 + 120 + 130 + 140 + 150 + 160 or 910 GB of source and 160 GB of stored. This is a ratio of 5.6875:1. Actual results will be somewhere in between. On 7/24/08, Ludovic Drolez <[EMAIL PROTECTED]> wrote: > Hi ! > > Here's an interesting article about deduplication: > > > http://thebackupblog.typepad.com/thebackupblog/2008/07/the-impact-of-deduplication-methodology-on-deduplication-ratios.html > > This blog is the EMC Avamar's blog, and has some other interesting > articles. Deduplication rates are impressive, I hope we will reach > them one day with backuppc :-) > > For the NetBackup puredisk blog, go to > https://forums.symantec.com/syment/blog?blog.id=NetBackup > And there's also Sepaton's blog : http://www.aboutrestore.com/ > > It seems that a war has begun in the deduplication world ! > > Cheers, > > -- > Ludovic Drolez. > > http://www.palmopensource.com - The PalmOS Open Source Portal > http://www.drolez.com - Personal site - Linux, Zaurus and PalmOS stuff > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > BackupPC-users mailing list > [email protected] > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ > -- Jonathan Craig ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
