rsync -append "chunk" size

Marcin Polkowski marcin at
Sat Sep 28 17:11:33 CEST 2013

I must say i've tried everything to change this 262144 byte size 
incrementation with no luck. Is this value hardcoded in rsync or it's 
system dependent? Hope someone will know - it's really important for me 
to change it to smaller value.



Marcin Polkowski

Zak?ad Fizyki Litosfery IGF UW

mobile: +48 607561871

mail:marcin at
<mailto:marcin at>

> Marcin Polkowski <mailto:marcin at>
> 3 wrzes'nia 2013 10:44
> I'm transferring 1.1 Mb files over very poor GSM EDGE connection. My 
> rsync command is:
> rsync --partial --remove-source-files --timeout=120 --append 
> --progress --rsh=ssh -z LOCAL_FILE root at SERVER:REMOTE_PATH
> File on remote server "grows" in size in steps of 262144 bytes. That 
> is a lot, because system needs to transfer at least 262144 (before 
> compression) every time connection is established. When I use scp --C 
> chunk size is about 32Kb. Is there a way to change chunk size for 
> rsync? I use rsync 3.0.7.
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