periodic script in base system to run csup
christof.schulze at gmx.com
Sat Jul 17 08:16:17 UTC 2010
> [periodic updating source]
Besides technical feasibility: What is the use case behind it?
Am Saturday 17 July 2010 10:00:07 schrieb Matthew Seaman:
> On 17/07/2010 24:04:38, Lowell Gilbert wrote:
> > Alex Kozlov <spam at rm-rf.kiev.ua> writes:
> >> On Fri, Jul 16, 2010 at 04:27:39PM +0200, Gabor Kovesdan wrote:
> >>> Em 2010.07.16. 16:23, Alex Kozlov escreveu:
> >>>> On Fri, Jul 16, 2010 at 03:58:33PM +0200, Gabor Kovesdan
> >>>> Thousands pc simultaneously try to access cvsup servers?
> >>>> Sound like a ddos to me.
> >>> Yes, this was the only concern and that's why I started this
> >>> discussion.
> >> And because its periodic, We can't use portsnap solution
> >> before csup start).
> > It's not completely impossible; periodic could spin off a
> > for it, with a random delay. It's not clear what the best way
> > with the output would be, although several approaches present
> > It would be a lot more complicated than Gabor's approach,
> Simply ensuring the csup periodic job is the last one to run
> (/etc/periodic/daily/1000.csup ?) should give you the best of both
> worlds. You can insert a random delay of up to an hour and still
> with csup as a foreground job. All of the other periodic jobs
> as normal (and should help with randomising the time distribution
> csup runs too) -- you'll just have to wait a bit longer for the
> e-mail to be produced.
> Even so, I think this is still likely to upset the cvsup servers:
> whole timezone worth of machines hitting a small number of servers
> within one or two hours might be doable with portsnap / freebsd-
> but cvsup requires a lot more effort server-side.
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