When I dont specify --block-size but have --write-batch=xxx, I get a xxx.rsync_csum file that is 76 Kbytes in size. The size of the file varies as the size of the "reference" file is varied. --stats showed matched data that is roughly 6 block lengths based on the square root of the newer file.
I copy the original data back to the target directory so that I can repeat the experiment. I compute a block size that is the square root of the size of the "reference" file and use --block-size= the computed size. The xxx.rsync_csum file is 12 K bytes in size. The xxx.rsync_delta file is the size of the newer file and --stats shows 0 for matched data. I copy the original data back to the target directory. I vary the block size to half the previous example. I rerun the experiment. The xxx.rsync_csum file is still 12 K bytes in size. The xxx.rsync_delta file is still the size of the newer file and --stats shows 0 for matched data. This is non intuitive. If I got 6 matched blocks when the square root is 181,272 then I would expect to get 6 matched blocks when I specify --block-size = 181,272 and 12 when --block-size is 90636. I would also expect to see xxx.rsync_csum size to double when I divide the blocksize by 2. What am I missing?? wally -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
