On Sat, 3 Apr 2010 13:52:22 -0700 Benjamin Black <b...@b3k.us> wrote:
BB> What happens if the IP I get back is for a seed that happens to be BB> down right then? And then that IP is cached locally by my resolver? You have to set the TTL to be the right number of seconds for your environment. With tinydns on a dedicated subdomain, even an old machine could support really short TTLs. BB> There is certainly a tempting conceptual simplicity to using DNS, I BB> just don't think the reality is that simple nor is it for the trade in BB> predictability, for me. IMO, this is better done either through BB> automation to generate the configs (how I do it; I just update BB> chef-server) or through a service like ZK (how I might do it in the BB> future, in combination with automation). DNS tends to be everywhere and easily configurable, so it's a pretty good lowest common denominator. I think Zeroconf AKA mDNS/DNS-SD is a good alternative to simple DNS RR for many environments and I will eventually propose a contrib plugin for Cassandra that provides it if no one else gets to it first (we discussed this previously). Modern Linux systems support Zeroconf AKA mDNS/DNS-SD through Avahi. Ted
