[Bug 9783] please don't use client-server model for local copies

samba-bugs at samba.org samba-bugs at samba.org
Mon Dec 2 16:02:01 MST 2013


--- Comment #5 from m8r-28l5q21 at mailinator.com 2013-12-02 23:01:59 UTC ---
I can only chime in on this bug.
I'm using rsync on my ReasyNAS 102, which as an ARM core (Marvell Armada 370).
Unfortunately, rsync is _very_ slow locally. The constant checksumming is

For example :
1) rsync -Pi --protocol=29 speed is around 21MB/s
2) rsync -Pi --protocol=30 speed is around 18MB/s
3) cp speed is around 70MB/s

The speed for rsync difference can be explained by MD4 being faster than MD5.

So on slow CPUs the checksumming is a clear bottleneck and it would be nice to
have a --no-checksum or --checksum=crc32 algorithm to avoid this problem.

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