Copying a large file from an USB 3 disk (NTFS or EXT4) to another one (UFS/FreeBSD) is a very slow process....
hjmangalam at gmail.com
Sun Nov 28 21:44:30 UTC 2021
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.
On Sun, Nov 28, 2021, 11:43 AM Kevin Korb via rsync <rsync at lists.samba.org>
> 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 at 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. Kevin at FutureQuest.net (work)
> Orlando, Florida kmk at 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:
> Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the rsync