On Mon, Jun 18, 2018 at 9:38 AM, Bowie Bailey <bowie_bai...@buc.com> wrote:
>
> I have another big local backup that's been running all weekend. I am
> trying sudo/rsync rather than rsyncd or ssh/rsync this time. This
> directory has millions of small files (and is even bigger than the first
> one), so I expect it to take longer.
>
> This time, I'm seeing higher IO-wait numbers:
Moving the disk head around is almost always the slowest operation and
on the first full it has to traverse every file. And backups tend to
not fit the normal OS caching mechanisms that try to hide that
slowness.
--
Les Mikesell
lesmikes...@gmail.com
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