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From Peter Fales <Peter.Fa...@alcatel-lucent.com>
Subject Re: Cassandra on AWS across Regions
Date Wed, 01 Sep 2010 20:42:15 GMT
I probably should have made it clear that I wasn't proposing this as
an official patch (as you point out, it's not general enough for 
production use).   I'm just looking for feedback on the concept (thanks!)
and thought it might possibly be useful to other folks trying to
do the same thing.


On Wed, Sep 01, 2010 at 03:24:44PM -0500, Benjamin Black wrote:
> The issue is this:
> 
> The IP address by which an EC2 instance is known _externally_ is not
> actually on the instance itself (the address being translated), and
> the _internal_ address is not accessible across regions.  Since you
> can't bind a specific address that is not on one of your local
> interfaces, and Cassandra nodes don't have a notion of internal vs
> external you need a mechanism by which a node is told to bind one IP
> (the internal one), while it gossips another (the external one).
> 
> I like what this patch does conceptually, but would prefer
> configuration options to cause it to happen (obviously a much larger
> patch).  Very cool, Peter!
> 
> 
> b
> 
> On Wed, Sep 1, 2010 at 1:10 PM, Andres March <amarch@qualcomm.com> wrote:
> > Could you explain this point further?  Was there an exception?
> >
> > On 09/01/2010 09:26 AM, Peter Fales wrote:
> >
> > that doesn't quite work with the stock Cassandra, as it will
> > try to bind and listen on those addresses and give up because they
> > don't appear to be valid network addresses.
> >
> > --
> > Andres March
> > amarch@qualcomm.com
> > Qualcomm Internet Services

-- 
Peter Fales
Alcatel-Lucent
Member of Technical Staff
1960 Lucent Lane
Room: 9H-505
Naperville, IL 60566-7033
Email: Peter.Fales@alcatel-lucent.com
Phone: 630 979 8031

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