RSync Block size

[mchangrh]

After a few tests to see why deltas were not being generated I came to the unfortunate conclusion that the data isn't really chunkable or doable in blocks

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all data is replicating to May 10 dataset

Column A is Replication source date
Row 1 is block size in bytes
data is bytes matched

	2048	1024	512	256	128	64
4/29	162.62 MB	404.24 MB	672.73 MB	884.11 MB	1.03 GB	1.11 GB
3/1	0.00 KB	0.00 KB	0.00 KB	0.77 KB	1.47 MB	194.18 MB
12/31	0.00 KB	0.00 KB	0.00 KB	0.26 KB	760.19 KB	162.23 MB

	2048	1024	512	256	128	64
4/29 zstd	212.99 KB	510.98 KB	2.05 MB	5.91 MB	11.78 MB	19.86 MB
3/1 zstd	0.00 KB	0.00 KB	0.00 KB	0.00 KB	0.64 KB	4.80 KB
12/31 zstd	0.00 KB	0.00 KB	0.00 KB	0.00 KB	0.26 KB	0.77 KB

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test with larger block sizes

blksize	matched
34.46 KB	1.62 MB
32.00 KB	1.66 MB
24.00 KB	2.38 MB
12.00 KB	4.28 MB
6.40 KB	10.89 MB
3.20 KB	65.66 MB
1.60 KB	237.85 MB