Hi Darren,
The copy is going between these two machines:
Source:
SunFire X4100 Dual 2.2Ghz Opteron (single core) 2GB RAM - SAN Attached
(STK FLX210) - ZFS RAID-Z zpool
Destination:
SunFire T2000 8-Core 1.2GHz T1 w/ 8GB RAM - SAN Attached (STK FLX210)
- ZFS RAID-Z zpool
No compression is used in either filesystem, and the majority of the
files between 120MB and 4GB. It''s a set of about 20 files. Total
transfer is 22GB.
Both systems are attached via GigE on the same switch.
The zfs send/receive via SSH averages about 3MB/s. The scp averages about 6MB/s.
Hope this helps explain what''s going on.
Best Regards,
Jason
On 11/15/06, Darren J Moffat <Darren.Moffat at sun.com>
wrote:> Jason J. W. Williams wrote:
> > Hi there,
> >
> > I''ve been comparing using the ZFS send/receive function over
SSH to
> > simply scp''ing the contents of snapshot, and have found for
me the
> > performance is 2x faster for scp.
>
> Can you give some more details about the configuration of the two
> machines involved and the ssh config.
>
> For example is compression used in the file system and/or with the ssh
> connection.
>
> How much data are you transfering ? Is is lots of small files or a few
> number of large files ?
>
> Can you give some actual numbers.
>
> > Has anyone else noticed ZFS send/receive to be noticeably slower?
>
> I haven''t but then I haven''t done much benchmarking since
it was fast
> enough for what I needed.
>
> This is actually a very good pair of things to compare. It would also
> be interesting to compare rsync over ssh as well.
>
> --
> Darren J Moffat
>