zfs discuss - Dec 2012 - How can I copy a ZFS filesystem back and forth

I turned compression on for several ZFS filesystems and found performance
was still fine. I turned gzip on and it was also fine and compression on
certain filesystems is excellent. I realize all the files that were on the
filesystem when compression=on did not get the benefit of gzip when I set
compression=gzip.

I would like everything to be compressed with gzip. What''s the easiest
way
for me to accomplish this? I figured some sort of copy back and forth is
required, but I don''t know what would be fastest. Should I just rsync
everything to a new filesystem with compression=gzip set and then delete the
original and and rename the new one, or zfs send or ?? Can I do a send and
receive into a filesystem with attributes set as I want or does the receive
keep the same attributes as well? Thank you.

> original and and rename the new one, or zfs send or ?? Can I do a send and
> receive into a filesystem with attributes set as I want or does the receive
> keep the same attributes as well? Thank you.
That will work. Just create the new filesystem with the attributes you
want and send/recv the latest snapshot. As the data is received the
gzip compression will be applied. Since the new filesystem already
exists you will have to do a "zfs receive -Fv" to force it.

--chris

Thanks for the help Chris!

Cheers,

Fritz

You wrote:
> > original and and rename the new one, or zfs send or ?? Can I do a send
and
> > receive into a filesystem with attributes set as I want or does the
receive
> > keep the same attributes as well? Thank you.
> 
> That will work. Just create the new filesystem with the attributes you
> want and send/recv the latest snapshot. As the data is received the
> gzip compression will be applied. Since the new filesystem already
> exists you will have to do a "zfs receive -Fv" to force it.
> 
> --chris