On 02/25/2011 03:39 PM, Andre Nathan wrote:
> On Fri, 2011-02-25 at 08:06 +0100, Daniel Lezcano wrote:
>> I did exactly the same configuration and ran 1024 containers.
> By the way, how did you handle the start-up of that many containers? The
> load average goes up very quickly unless I add a "sleep 1" between
> lxc-start calls...
Mmh, I don't remember exactly what I did (that was last year). But you
are right, the containers where spawned one after the other. I think I
was doing lxc-wait -n <name> -s RUNNING before running the next
container. As I have a 8 cores, that did not take so much time to boot
(2 minutes).
I was using dnsmasq as a dns and a dhcp server and sending the hostname
as an identifier for the dhcp protocol, so I was able to reach the
container without taking care of the ip address / mac address. But I
noticed dnsmasq was collapsing and taking a very long time before
sending an ip address after ~ 600 containers.
The first 500 containers were taking 2 minutes to start.
The next 500 containers were taking 6 minutes to start.
> Did you have "Neighbour table overflow" errors? I tried increasing
> net.ipv4.neigh.default.gc_thresh{1,2,3} but that didn't fix the problem.
I didn't notice the message, but maybe I missed it.
Google says you can setup these tables with the following values if you
encounter this problem.
echo 256 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
echo 512 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
echo 1024 > /proc/sys/net/ipv4/neigh/default/gc_thresh3
Do they fix your problem ?
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