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From Ted Zlatanov <...@lifelogs.com>
Subject Re: finding Cassandra servers
Date Wed, 03 Mar 2010 17:12:22 GMT
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.

How do your clients at Twitter find server nodes?  Do you just run them
local to each node?

My concern is that both RRDNS and seed node lists are vulnerable to
individual node failure.  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.

With seed node lists, if I get unlucky I'd be trying to hit a downed
node in which case I may as well just use RRDNS and deal with connection
failure from the start.

Ted


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