Intelli-Delta is a powerful and proven technology that performs backups for only the incremental changes in files. Instead of handling incremental changes at block level (e.g. 4KB blocks), StorCell's Intelli-Delta technology goes one, actually, two steps further. StorCell does not implement pre decided block sizes as this is often sub-optimal. For a small file, the block size may be too large and hence translate to a larger amount of data being sent than what's required. For very large files, a small block size translates to performance degradation. StorCell decides on individual optimal block sizes for every single file after taking into account the original file size. This ensures that for each file, changes are examined at an 'optimised byte level'.
Additionally, StorCell also leverages RSYNC's powerful 'Rolling Checksum' feature; going one more step ahead of conventional approaches to incremental backups.
For more on the RSYNC algorithm, please visit http://samba.anu.edu.au/rsync/
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