I see the confusion, I should have been more exact with units.
The units are in bytes not bits. So if my math is correct, 35 gigabytes
in 16 hrs is 35,840 megabytes in 16*60*60 sec, that
gives me 0.62 megabytes per sec.
Still too slow..
--- Greg Freemyer <greg.freemyer@xxxxxxxxx> wrote:
> On 7/18/05, Eugene Melamud wrote:
> > Greetings,
> >
> > I am getting really miserable results from xfsdump when mirroring large
> > filesystem over
> network.
> > The command I run on the source computer is this.
> >
> > xfsdump -A -J - /dev/sda1 | ssh node22 xfsrestore -J -A - /backup
> >
> > Two computers are connected via 1Gbit network. Connection is good, when I
> > test transfers with
> > rsync, I get transfer between two computers at 35Mb/sec easy on large
> > files. The maximum read
> > speed on /dev/sda1 measured with dd is about 45 Mb/sec. The maximum write
> > speed on /backup
> raid
> > disk is about 100Mb/sec.
> >
> > Given that the most file on the filesystem are small, I can not expect very
> > high throughput. I
> was
> > hopping for at least 10Mb/sec. What I get is 35G transferred in the last
> > 16hrs, that's less
> than
> > 1Mb/sec.
> >
>
> Still not fast, but by my math 35GB in 16 hours is 5.3 Mb/sec. (Were
> you calculating MB/sec. ?)
>
> Or were all of the above Mb/sec. figures meant to be MB/Sec. They do
> all seem too small for Mb/Sec. values.
>
> Greg
> --
> Greg Freemyer
> The Norcross Group
> Forensics for the 21st Century
>
|