Robin Lee Powell wrote:
>
> How about 73?  Surely not a block aligment.  :D
>
> dd if=/dev/urandom of=test_rand_wierd bs=1 count=73
> cat test_rand_wierd test_long1 >test_wierd1
> cat test_rand_wierd test_long1 >test_wierd2
> cat test_rand_wierd test_long1 test_rand_wierd >test_wierd3
>   
All files begin and end the same way, so I'm not sure what you are 
trying to test here. Try this:
dd if=/dev/urandom of=random1 bs=1024 count=16
dd if=/dev/urandom of=random2 bs=1024 count=1024
dd if=/dev/urandom of=pad bs=1 count=73

cat random1 random2 > before
cat random1 pad random2 > after

Now see if rsync manages to save much when it has "before" and it needs 
"after" (or vice versa)

Shachar

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