In my opinion, the biggest issue you will have in having good backups over
the long term, is that WD green drive. You really need to have at least 2
drives in a raid-1, preferrably more in a raid 10 or 5 or 6, because your
single 1TB green is going to wear itself out with writes and seeks very
very quickly. That drive will not sustain at high read/write by itself even
in the short term.
Once you get a good full backup, and as Les said, use -checksum-seed, your
network utilization will be less of a bottleneck.
As I've said before, RAM is the second real issue, and more will help a ton
with rsync backups.
On Mon, Apr 8, 2013 at 11:03 AM, Les Mikesell <[email protected]> wrote:
> On Mon, Apr 8, 2013 at 11:02 AM, Gary Roach <[email protected]>
> wrote:
>
> > > Above, do you really mean that I could expect transfer rates as
> low
> > as 600 to 800 KB/S. I could carry the data in a bucket faster. I don't
> > have a real good figure for the transfer rates for my present setup but
> > know they are way faster than that.
> >
> > I am getting the idea that putting in a GigE system isn't going to buy
> > much speed. Any comments?
>
> Your bottleneck is really going to be the seek time on those older
> disk drives, and the smaller the files the more trips the heads have
> to make to the diretory/inode/data. Adding RAM can help some by
> letting you cache more of the directory/inodes. With rsync, after
> the initial full run, the network speed won't matter that much.
> You'll still spend a lot of time reading and computing the checksums
> for verification at both ends but only the differences are
> transferred. If you use the --checksum-seed option, after the 2nd
> full copy of any file the server will used the cached copies instead
> of having to uncompress its copy to recompute them.
>
> --
> Les Mikesell
> [email protected]
>
>
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--
Jeff Folsom
------------------------------------------------------------------------------
Minimize network downtime and maximize team effectiveness.
Reduce network management and security costs.Learn how to hire
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