File-based replication does offer the ability to replicate only specific files. However, if as little as one bit of data has changed on a very large file, the entire file is considered as having changed and will be replicated with most solutions.
is it the case with 'rsync' too ? or rsync only replicates the delta ?
"....It is famous for its delta-transfer algorithm, which reduces the amount of data sent over the network by sending only the differences between the source files and the existing files in the destination......"
Truly Evil Lucifer Megacruel
"To Denouce the Evils of Truth and Love. To cause may hem and destruction and necromancy , Lucifer is here"
"is it the case with 'rsync' too ? or rsync only replicates the delta ?"
Yes. Unfortunately.
One solution I am currently brewing in my LAB is DRBD -- an open source block level based Storage replication/clustering solution -- so say you have a 50GB file and only a few bits changed on it -- the other site/machine will only update those changed bits...
