Ok, thanks for that explanation. H On Sun, Nov 28, 2021, 1:59 PM Kevin Korb <k...@sanitarium.net> wrote:
> Rsync is designed to reduce the amount of data transmitted over the > network. If rsync isn't networking it can't do that. However, it still > uses the same code so it is still using a sender and a receiver rather > than simply reading and writing as cp does. Also, rsync forces > --whole-file because using rsync's algorithm to delta-copy is slower > than just re-copying a file (especially if one of the local paths is > really a network mount and double especially if that is the writing end). > > On 11/28/21 16:44, Harry Mangalam wrote: > > Can you elaborate on why this is? > > > > I wrote a parallel rsync wrapper that works very well over networks but > > is similarly very slow over local disks. I thought it was a bug in my > > code but didn't get around to tracking it down since my use cases were > > all network/ parallel file systems. > > Harry > > > > On Sun, Nov 28, 2021, 11:43 AM Kevin Korb via rsync > > <rsync@lists.samba.org <mailto:rsync@lists.samba.org>> wrote: > > > > rsync is terribly slow at local copies. Also, it doesn't do its > normal > > optimizing (see --whole-file). Just use cp. > > > > On 11/28/21 13:38, Mario Marietto via rsync wrote: > > > Hello to everyone. > > > > > > I'm copying a large file from a NTFS formatted disk to another > > > one,UFS/FreeBSD disk,both are removable disks attached to the USB > 3 > > > port. The file is 200 GB large and it is copied very slowly. Why > > it is > > > so slow ? I don't know where to store my virtual machines. I > > tried to > > > save them on the ext4 disk because I wanted to share them easily > > between > > > Linux and FreeBSD but I've realized that when I mount the disk in > > > FreeBSD after some time it corrupts. I tried to store it on the > NTFS > > > disk but it happens the same. So,now I'm on FreeBSD and I'm > > copying them > > > to a dedicated UFS/FreeBSD style disk,but as I said,the speed is > > very > > > slow. How can I increase the speed ?. Actually I'm using this > > > command,because I want to resume the uploading if it breaks at > > some point : > > > > > > > > > root@marietto:/mnt/da3p2/bhyve/Ubuntu # rsync -avAXEWSlHh > > > /mnt/da0p1/Backups/OS/bhyve/Ubuntu/im* . --no-compress > > --info=progress2 > > > > > > sending incremental file list > > > impish-cuda-11-4-nvidia-470.img > > > > > > 2.13M 0% 9.49kB/s 6284:55:38 > > > > > > > > > and : where do you save large files ? what's the procedure that > > you use > > > to copy large files with a decent speed ? Unfortunately under > > Linux is > > > not safe to use a RW ufs disk access. So,I'm out of solutions. > > > > > > - > > > Mario. > > > > > > > -- > > > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._., > > Kevin Korb Phone: (407) 252-6853 > > Systems Administrator Internet: > > FutureQuest, Inc. ke...@futurequest.net > (work) > > Orlando, Florida k...@sanitarium.net > > <mailto:k...@sanitarium.net> (personal) > > Web page: https://sanitarium.net/ <https://sanitarium.net/> > > PGP public key available on web site. > > > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._., > > > > -- > > Please use reply-all for most replies to avoid omitting the mailing > > list. > > To unsubscribe or change options: > > https://lists.samba.org/mailman/listinfo/rsync > > <https://lists.samba.org/mailman/listinfo/rsync> > > Before posting, read: > > http://www.catb.org/~esr/faqs/smart-questions.html > > <http://www.catb.org/~esr/faqs/smart-questions.html> > > > > -- > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._., > Kevin Korb Phone: (407) 252-6853 > Systems Administrator Internet: > FutureQuest, Inc. ke...@futurequest.net (work) > Orlando, Florida k...@sanitarium.net (personal) > Web page: https://sanitarium.net/ > PGP public key available on web site. > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._., >
-- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html