At 11:28 AM 12/18/2009, Scott Marlowe wrote:
On Thu, Dec 17, 2009 at 7:51 PM, David Boreham <david_list@xxxxxxxxxxx> wrote:
> Scott Marlowe wrote:
>>
>> I would recommend using a traffic shaping router (like the one built
>> into the linux kernel and controlled by tc / iptables) to simulate a
>> long distance connection and testing this yourself to see which
>> replication engine will work best for you.
>>
>
> Netem :
> http://www.linuxfoundation.org/collaborate/workgroups/networking/netem
> We used this to make a test rig for Directory Server replication, to verify
> a
> re-design that added pipelining to the replication protocol.
> It's already in the modern Linuxes--just needs to be configured.
Wow, everytime I turn around someone's built something cool from a set
of small sharp tools. Thanks!
There's also a livecd with a WebUI to emulate WANs. I think it's
basically a wrapper around tc/netem, but I find it convenient for
quick and dirty tests.
http://wanem.sourceforge.net/
It seems you currently can only control outbound traffic from an
interface, so you'd have to set stuff on both interfaces to "shape"
upstream and downstream - this is not so convenient in some network topologies.
Regards,
Link.
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