The
problem: Standard “Incremental” backup systems which
are in reality not very incremental at all.
Today’s Standard “Incremental” backup systems save
all the files that have been modified since the last
backup. However, in every case, the entire file
is saved, even when just one byte has been changed
since the last backup performed. The following diagram
shows the reality of the standard “incremental” backup
systems on the market today:
This is problematic in view of the fact that the use of applications such as Ghost, Drive Image,
VMWare, VirtualPC, Outlook, Outlook Express, Lotus Notes, Exchange Server, Access, SQL, etc., is
becoming more and more habitual, and all these applications generate big files that are constantly
being modified.
Even though the user or administrator configures an “incremental” backup with one of the many standard
backup applications available, the backup turns out not to be as incremental as it should be:
instead of saving a few megabytes or even kilobytes each day, the program backs up far more: 100% of all
files that have been modified since the last backup or incremental back up, even if there has only
been a small modification made in each file. This means that huge amounts of storage space are
being occupied when only a fraction of this would be necessary if it were possible to save only the
changes made in a given file instead of the entire file!
The solution: Byte-level Delta Patching technology
Kondar Byte-level Delta Patching technology is the new and revolutionary technology for doing exactly this:
making Byte-level Delta Patches of very large files by saving only the information or sectors that
have been modified.
This technology is capable of creating very small incremental backups of large files by using our
100% proprietary algorithms designed for large blocks of information. The files generated by Kondar
occupy between 10 and 100 times less than the original files.
Kondar is not a traditional backup application per se. Instead, Kondar complements traditional backup systems
perfectly, providing them with an extra functionality: a drastic improvement in their capability to
create very small incremental backups.
Integrating Kondar technology into a standard backup application enables it to create far smaller
incremental backups than would be possible without the Kondar technology, especially in the case of very
large files.
How does Kondar work?
Kondar compares the original file (the “source” file) with the modified file (“target” file) and then
creates a third, far smaller file that contains only the differences between the first two files.
This third file is the Byte-level Delta Patch. You can have a daily backup simply by saving the
original file and the Byte-level Delta Patch files.
Once you have the Kondar file, you can delete or modify the target file without risk, since you can
easily recover it just by using the source file and the Kondar file.
Several backups can be made simply by saving the source file and the Kondar files.
Here’s a diagram that illustrates the differences between the results produced by standard
“incremental” backups and those of Kondar technology:
To what degree is Kondar really different from other standard “incremental” backup
applications?
In the following table we can see a comparison of the sizes of some files saved using one of the many
standard “incremental” backup programs and the Kondar incremental or differenctial backups.
The results leave few doubts
as to the amount of space that can be saved by using our Byte-level Delta Patching technology.
