@Stephan ``` rsync --archive --human-readable --info=progress2 source dst ```
@toomas USB3 @Peter could be the compression, I will check next time. On Mon, Nov 3, 2025 at 11:06 PM Stephan Althaus via oi-dev <[email protected]> wrote: > > On 11/4/25 05:03, Atiq Rahman wrote: > Hi, > When I am copying over files to the zfs dataset on an external HDD, the > speed is one third of what it is over exFAT. This is zfs to zfs copy which > is basically way slower than zfs to exFAT. > > This was my zpool create command on the external drive, > > ``` > zpool create -o ashift=12 -O compression=lz4 -o autotrim=off -O > mountpoint=none -O atime=off -O dnodesize=auto hyperspace /dev/dsk/c4t0d0 > ``` > > And, this is how the dataset was created: > > ``` > zfs create -o recordsize=1M -o normalization=formD -O mountpoint=/media > hyperspace/media > ``` > > I know zfs has journaling overhead. But, is it possible to set certain zfs > properties to improve the transfer speed? > > Hello Atiq! > > How do you copy, please show the commands (?) > > You may want to investigate the read speed with something like zfs send ... > > /dev/null > > If you do a zfs send -> receive, a buffer like "mbuffer" may help, over > network pathes in combination with a compression pbzip2, pigz ... > > > > Regards, > > Stephan > > > Hello Atiq! > > How do you copy, please show the commands (?) > > You may want to investigate the read speed with something like zfs send ... > > /dev/null > > If you do a zfs send -> receive, a buffer like "mbuffer" may help, over > network pathes in combination with a compression pbzip2, pigz ... > > > > Regards, > > Stephan > > If its external HDD, which interface? usb3? > > rgds, > toomas > > > > On Tue, Nov 4, 2025 at 12:54 AM Peter Tribble <[email protected]> > wrote: > > Journaling normally speeds things up. > But generally I would start with using the defaults (except compression), > other settings generally > only come into play in specialist cases. > > > > -- > -Peter Tribble > http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/ > _______________________________________________ > oi-dev mailing list > [email protected] > https://openindiana.org/mailman/listinfo/oi-dev > _______________________________________________ oi-dev mailing list [email protected] https://openindiana.org/mailman/listinfo/oi-dev
