Forum Discussion
manc_63343
Nimbostratus
NimbostratusGTM failure causing customer impact
We are kind of paranoid and thinking what if we have to keep the GTM down for several hours, then what will be our fallback. We already have redundant GTM but still we are exploring the question in ca...
JRahm
Admin
AdminPosted By Chris Miller on 01/25/2011 05:47 PM
If you're worried about losing both, why not buy a third? :-P
With mail records, this is nice and easy since you get to configure priorities.
With standard DNS, I'm pretty sure you'll need to make A-records pointing directly to the LTMs. Yes, this is a manual "fail-over" but with short TTLs, you can minimize the outage.
sorry, manc. I was more responding to Chris's post here about minimizing outages. It's always a give/take. Yes, an outage can be recovered in 30 seconds, but is that worth 99.99% of the time having a worse user experience? Perhaps..depends on the business requirements.
To answer your question, DNS isn't like an active/standby scenario with LTM. If you have 2,3, 4 (shouldn't be more than 4) GTM's authoritative for that record, the LDNSs of the world querying will reach out to all of them in case of failures to any one or more of them.
