h2. rsync

The linux utility is used to keep two copies of the same file in sync by copying around deltas. Instead of replicating the whole changed file, rsync segments the file into fixed size chunks, computes a rolling hash for each chunk. On the client side computes rolling hashes for all chunks of the target file including overlapping ones. Then it checks which chunks are already there, which chunks need to be deleted and which chunks need to be copied over. This improves the transfer speed as you only copy over deltas and some chunk fingerprints.

The linux utility is used to keep two copies of the same file in sync by copying around deltas. Instead of replicating the whole changed file, rsync segments the file into fixed size chunks, computes a rolling hash for each chunk. On the client side computes rolling hashes for all chunks of the target file including overlapping ones. Then it checks which chunks are already there, which chunks need to be deleted and which chunks need to be copied over. This improves the transfer speed as you only copy over deltas and some chunk fingerprints. Here's a 'better description':http://en.wikipedia.org/wiki/Rsync#Algorithm from wikipedia.

h2. Largest palindrome