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Date: Thu, 19 Mar 2015 17:14:18 -0700
From: Linda Walsh <cygwin AT tlinx DOT org>
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To: cygwin AT cygwin DOT com
Subject: Re: rsync still broken
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Frank Fesevur wrote:
> ... I use --numeric-ids and I have these two lines in the rsyncd.conf
> uid = 0
> gid = 0
---
	How is your local rsync talking to the server?

I.e. using the 'rsyncd' daemon running on the server?

For me, I don't have the rsyncd daemon running full time on the
server, but use the "remote shell" option with my RSYNC_RSH environment
var set to 'ssh'.  Just reading on the man page that this is the
default on most systems these days.

If you use the "rsyncd" daemon, you should read the rsyncd.conf manpage:
Especially this section:

       uid    This  parameter  specifies  the  user  name or user ID ...
              The default
              when  run  by a super-user is to switch to the system’s "nobody"
              user.  The default for a non-super-user is to not try to  change
              the user.  See also the "gid" parameter.
---
It doesn't look like uid and gid set to 0 will "just work".

If you use the 'ssh' protocol for transfers, you would need to be
able to login from your local system to the server as 'root' with
no password:

i.e.:

   ssh root AT server

If that doesn't work -- rsync probably won't work correctly either.

> But the thing that surpises me is that in 3.0.9 is just worked.
---
I'm still at 3.0.9 and don't want to break things, but you are right:
---
law.Bliss> whoami
Bliss\law
law.Bliss> mkdir cygwin
law.Bliss> mkdir /h/cygwin			## /h=homedir on server
law.Bliss> llg -a /h/cygwin
total 0
drwxrwxr-x+ 1 Bliss\law lawgroup 0 Mar 19 17:07 ./
drwxr-xr-x+ 1 Bliss\law lawgroup 0 Mar 17 20:36 ../

law.Bliss> echo "test" >cygwin/test.txt
law.Bliss> rsync -a cygwin/. ishtar:cygwin/.
law.Bliss> llg -a /h/cygwin
total 4
drwxrwxr-x+ 1 Bliss\law lawgroup 0 Mar 19 16:42 ./
drwxr-xr-x+ 1 Bliss\law lawgroup 0 Mar 17 20:36 ../
-rw-rw-r--  1 Bliss\law lawgroup 5 Mar 19 16:42 test.txt

law.Bliss> rsync -v
rsync  version 3.0.9  protocol version 30
----
Yup -- seems to work in 3.0.9.


BTW -- rsync is pretty slow for some transfers -- created
a 1G local file and timed transfers with rsync, cp and dd.
with 'dd' I used "direct" which should be synchronous/unbuffered,
but I don't think rsync or cp have options to turn that off.
Still 'dd' was fastest, followed by 'cp' and rsync, well:


law.Bliss> dd if=/dev/zero of=1G bs=1M count=1024 oflag=direct
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.96472 s, 547 MB/s	#local file

law.Bliss> time rsync 1G ishtar:cygwin/
18.76sec 3.43usr 2.40sys (31.07% cpu)			#using rsync proto

law.Bliss> rm /h/cygwin/1G             
law.Bliss> time cp 1G /h/cygwin
8.53sec 0.00usr 0.77sys (9.13% cpu)			#cp using SMB/CIFS

law.Bliss> rm /h/cygwin/1G             
law.Bliss> time dd if=1G of=/h/cygwin/1G bs=1M count=1024 oflag=direct       
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 6.91213 s, 155 MB/s	# dd using SMB/CIFS
6.95sec 0.01usr 0.67sys (9.85% cpu)

law.Bliss> rm /h/cygwin/1G				# rsync using SMB/CIFS
law.Bliss> time rsync 1G /h/cygwin/       
29.18sec 3.52usr 3.08sys (22.65% cpu)


You might try reinstalling 3.0.9 and see if that still works --
would help narrow it down to whether or not it is in cygwin or in 
rsync.


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