A question about rsync's behaviour
in [Debian]
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From: Rodolfo Medina on 12 Aug 2010 11:20 Hi to all Debian users. I wish to know why rsync behaves in two different ways when working between two pcs connected by ethernet cable and, instead, when copying files from a pc to a pendrive. Here's the output in the former case: $ rsync -vrtul --delete Mail News 192.168.0.2:/home/rodolfo rodolfo(a)192.168.0.2's password: building file list ... done sent 75797 bytes received 20 bytes 16848.22 bytes/sec total size is 27753551 speedup is 366.06 and in the second: $ rsync -vrtul --delete Mail News /mnt/pendrive2 building file list ... done Mail/comp.emacs/ Mail/comp.emacs/324 Mail/comp.emacs/325 Mail/comp.emacs/326 Mail/comp.emacs/327 Mail/comp.emacs/328 Mail/comp.emacs/329 Mail/comp.emacs/330 Mail/comp.emacs/331 Mail/comp.emacs/332 Mail/comp.emacs/333 Mail/comp.emacs/334 Mail/comp.emacs/335 Mail/comp.emacs/336 [...] News/drafts/drafts/21 News/drafts/queue/ News/marks/ News/marks/freenews.netfront.net-ephemeral/ News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/ News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/.marks News/marks/news.gmane.org/ News/marks/news.gmane.org/gmane.linux.debian.user/ News/marks/news.gmane.org/gmane.linux.debian.user/.marks News/marks/news.gnus.org-ephemeral/ News/marks/news.readfreenews.net-ephemeral/ sent 7616774 bytes received 30996 bytes 728359.05 bytes/sec total size is 27753551 speedup is 3.63 The second output contain about 1,500 lines!, and the first only 5! Can anybody explain why this difference, and how to make rsync behave with the pendrive the same as with ethernet cable? Thanks for any help Rodolfo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/87iq3fsvw6.fsf(a)gmail.com
From: Jordan Metzmeier on 12 Aug 2010 11:30 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 08/12/2010 11:17 AM, Rodolfo Medina wrote: > Hi to all Debian users. > > I wish to know why rsync behaves in two different ways when working between two > pcs connected by ethernet cable and, instead, when copying files from a pc to a > pendrive. Here's the output in the former case: > > $ rsync -vrtul --delete Mail News 192.168.0.2:/home/rodolfo > rodolfo(a)192.168.0.2's password: > building file list ... done > > sent 75797 bytes received 20 bytes 16848.22 bytes/sec > total size is 27753551 speedup is 366.06 > > > and in the second: > > > $ rsync -vrtul --delete Mail News /mnt/pendrive2 > building file list ... done > Mail/comp.emacs/ > Mail/comp.emacs/324 > Mail/comp.emacs/325 > Mail/comp.emacs/326 > Mail/comp.emacs/327 > Mail/comp.emacs/328 > Mail/comp.emacs/329 > Mail/comp.emacs/330 > Mail/comp.emacs/331 > Mail/comp.emacs/332 > Mail/comp.emacs/333 > Mail/comp.emacs/334 > Mail/comp.emacs/335 > Mail/comp.emacs/336 > > [...] > > News/drafts/drafts/21 > News/drafts/queue/ > News/marks/ > News/marks/freenews.netfront.net-ephemeral/ > News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/ > News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/.marks > News/marks/news.gmane.org/ > News/marks/news.gmane.org/gmane.linux.debian.user/ > News/marks/news.gmane.org/gmane.linux.debian.user/.marks > News/marks/news.gnus.org-ephemeral/ > News/marks/news.readfreenews.net-ephemeral/ > > sent 7616774 bytes received 30996 bytes 728359.05 bytes/sec > total size is 27753551 speedup is 3.63 > > > The second output contain about 1,500 lines!, and the first only 5! > > Can anybody explain why this difference, and how to make rsync behave with the > pendrive the same as with ethernet cable? > > Thanks for any help > Rodolfo > > I am not sure the exact reason, but I am betting on something along the lines of the usb stick being formatted in a non-UNIX filesystem, such as vfat. I know this is often the case when preserving permissions, which you are not... So perhaps the time preservation? - -- Jordan Metzmeier -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQIcBAEBCAAGBQJMZBG9AAoJEKj/C3qNthmTmK4P/3DlhdTpYyCeWGvvMSrp0xWX hAZEL1YXvV1sDiUPck2oucdNbnTHXurB4j/LnkLRrwgu5s+tGxtrO7H822ILB1B2 ZkvjymC8IjShrQ9YwKbXfZg5GMSXvDqaP2Eu/rRw8m5HI/1zprBmDKCyviRjZ7Vr lSr7VmrqIOFqfoS8bYB41wblNzpzsDR9dpaVl3wZ0M67sIhsVBy6570VEJMm1rF4 cymrS57h8hwBt9zp3vZVk7gD1AqNz61CwdUDwuNfP7y/BADu6iyk4Ab8mo25BU62 TpKBjtnU9c74gsm4HWYaYSAdEl5OQxG7nCTHb2mMng1NT7iYpApRtR/JbkdAPcA2 rOb8RcJ/YmxC/XDd7A1xCtuCN9ZEP1nfP5zSCwVQi6WuW1dgbOqyRR3AksK28fCg 7H3ES8lMLju1BmS0AtK2ZndJm3TC5BWpL76fyNzXdo/lGh0d4Rpm+Nl9Xxx5lZY6 TEDRC95LOFBHlr9YHos/LepHbA5p5kp0PRM1vd3R2MclLt7PFQUp8Jb9Fjhsw0fU 5/XRiPkORQq0Npnj637iKFmWhqOoZ3u9WIlZuKsLjBO0FcnQZSRGA81b1YVgIgsd Paq03B1yzJ9vlFY94glFNdGY8bvb9hTbG3a5oZ2Og6AENFaY+uBCtiwJTf5d9OuL KjDllGD5SrUQXjixRhVQ =vu21 -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4C6411BD.2000002(a)gmail.com
From: Rodolfo Medina on 12 Aug 2010 13:20 Rodolfo Medina <rodolfo.medina(a)gmail.com> writes: On 08/12/2010 11:17 AM, Rodolfo Medina wrote: >>> I wish to know why rsync behaves in two different ways when working between >>> two pcs connected by ethernet cable and, instead, when copying files from a >>> pc to a pendrive. Here's the output in the former case: >>> >>> $ rsync -vrtul --delete Mail News 192.168.0.2:/home/rodolfo >>> rodolfo(a)192.168.0.2's password: >>> building file list ... done >>> >>> sent 75797 bytes received 20 bytes 16848.22 bytes/sec >>> total size is 27753551 speedup is 366.06 >>> >>> >>> and in the second: >>> >>> >>> $ rsync -vrtul --delete Mail News /mnt/pendrive2 >>> building file list ... done >>> Mail/comp.emacs/ >>> Mail/comp.emacs/324 >>> Mail/comp.emacs/325 >>> Mail/comp.emacs/326 >>> Mail/comp.emacs/327 >>> Mail/comp.emacs/328 >>> Mail/comp.emacs/329 >>> Mail/comp.emacs/330 >>> Mail/comp.emacs/331 >>> Mail/comp.emacs/332 >>> Mail/comp.emacs/333 >>> Mail/comp.emacs/334 >>> Mail/comp.emacs/335 >>> Mail/comp.emacs/336 >>> >>> [...] >>> >>> News/drafts/drafts/21 >>> News/drafts/queue/ >>> News/marks/ >>> News/marks/freenews.netfront.net-ephemeral/ >>> News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/ >>> News/marks/news.gmane.org-ephemeral/gmane.linux.debian.user/.marks >>> News/marks/news.gmane.org/ >>> News/marks/news.gmane.org/gmane.linux.debian.user/ >>> News/marks/news.gmane.org/gmane.linux.debian.user/.marks >>> News/marks/news.gnus.org-ephemeral/ >>> News/marks/news.readfreenews.net-ephemeral/ >>> >>> sent 7616774 bytes received 30996 bytes 728359.05 bytes/sec >>> total size is 27753551 speedup is 3.63 >>> >>> >>> The second output contain about 1,500 lines!, and the first only 5! >>> >>> Can anybody explain why this difference, and how to make rsync behave with >>> the pendrive the same as with ethernet cable? Jordan Metzmeier <titan8990(a)gmail.com> writes: >> I am not sure the exact reason, but I am betting on something along the >> lines of the usb stick being formatted in a non-UNIX filesystem, such as >> vfat. I know this is often the case when preserving permissions, which >> you are not... So perhaps the time preservation? Rodolfo: > You seem to be right: the problem seems to be solved adding in fstab > `uid=1000'. I spoke too early: the problem reappears at any new mounting of the pendrive. Jordan, what do you mean by time preservation? The time of the file is the same on te pc and on the pendrive. Thanks Rodolfo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/87iq3fpxbh.fsf_-_(a)gmail.com
From: Jordan Metzmeier on 12 Aug 2010 14:20 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 08/12/2010 01:14 PM, Rodolfo Medina wrote: >> `uid=1000'. > > > I spoke too early: the problem reappears at any new mounting of the pendrive. > Jordan, what do you mean by time preservation? The time of the file is the > same on te pc and on the pendrive. > > Thanks > Rodolfo > That was really a shot in the dark with that statement. I had hoped someone with more insight would chime in with more information. Anyways, my thought was that modification time on UNIX filesystems were different in way that rsync fails to preserve the modification time when copying to vfat. An easy way to check this would be to compare the modification times of the two copies. Regards, - -- Jordan Metzmeier -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQIcBAEBCAAGBQJMZDsaAAoJEKj/C3qNthmTqkEP/1C4Y0DYXHgBgnZbM47mEQCO eKtdXtksZPcjMtq81QbQeFkIzfSpvdct4PT4m5FCKbLehQXsnhz2UMpOhp2mbzb/ 1hHU5VbCzGALnL/AsKwtwaVhHiUazbQ0MIVYGOZ4XfgyQjyt8wPgi/2NiFkuHgrN LUYZjxAN+wwiYoo5Osg47z/MAakegPpVRSjEpeLHFv6MxvKZ3gd4O5sTqg3Mt9Ep J8J0HZOKZjaYzmFSqQedvz1Fx2xbAChqlbJjGen7LtbGLovqcl1L3AKjz6vPGZfM 4S52oncYfC1pX/7l4CEc4Z+N5MUU6kyJ7tiv6O1X3e2bawgdB8snM4POBO3WrqHd 9QKyTWKNMEvb59C/R1u26rjLK6lNoV+xLi6qWPzVTR5TJSB775UBurRqVdinqCsV JvoZfZU6OkjhV+m4OJHfGXcTO91JStY48gKipipSrG1PaRy8GG8Phyyf9yJJuyx2 raUGgxctH1xefQxWnT2EKumPVLcWCKqr7j03GTmW1XHVTJX6fiRZUTPnujzCEeeN lqiV2kDukQIslZTaK2nZSdeQ68tDt10C7hYwaMURP3arGBaizopisd2Ke8ktclo9 HG0a5wYhechhxU9hbcjiA2ECDkFsbG5eci0ZkRj8FKLXh1wdWRqYuzctnlZ34ab/ A8gmcjTm+gbRgk9InhoN =GcBv -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4C643B1A.7060608(a)gmail.com
From: Steve McIntyre on 12 Aug 2010 15:00 In article <4C643B1A.7060608(a)gmail.com> you write: >-----BEGIN PGP SIGNED MESSAGE----- >Hash: SHA256 > >On 08/12/2010 01:14 PM, Rodolfo Medina wrote: >>> `uid=1000'. >> >> >> I spoke too early: the problem reappears at any new mounting of the pendrive. >> Jordan, what do you mean by time preservation? The time of the file is the >> same on te pc and on the pendrive. >> >> Thanks >> Rodolfo >> > >That was really a shot in the dark with that statement. I had hoped >someone with more insight would chime in with more information. Anyways, >my thought was that modification time on UNIX filesystems were different >in way that rsync fails to preserve the modification time when copying >to vfat. > >An easy way to check this would be to compare the modification times of >the two copies. >From the rsync(1) man page: --modify-window When comparing two timestamps, rsync treats the timestamps as being equal if they differ by no more than the modify-window value. This is normally 0 (for an exact match), but you may find it useful to set this to a larger value in some situations. In particular, when transferring to or from an MS Windows FAT filesystem (which represents times with a 2-second resolution), --modify-window=1 is useful (allowing times to differ by up to 1 second). -- Steve McIntyre, Cambridge, UK. steve(a)einval.com Is there anybody out there? -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/E1Ojcgj-0004YE-AF(a)jack.mossbank.org.uk
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