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From Brandon Williams <dri...@gmail.com>
Subject Re: finding Cassandra servers
Date Wed, 03 Mar 2010 17:20:07 GMT
2010/3/3 Ted Zlatanov <tzz@lifelogs.com>

> On Wed, 3 Mar 2010 09:04:37 -0800 Ryan King <ryan@twitter.com> wrote:
>
> RK> Something like RRDNS is no more complex that managing a list of seed
> nodes.
>
> My concern is that both RRDNS and seed node lists are vulnerable to
> individual node failure.


They're not.  That's why they're lists.  If one doesn't work out, move along
to the next.


>  Updating DNS when a node dies means you have
> to wait until the TTL expires, and if you lower the TTL too much your
> server will get killed.
>

Don't do that.  Make your clients keep trying.  Any failure is likely to be
transient anyway, so running around messing with DNS every time a machine is
offline doesn't make much sense.

-Brandon

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