nanog mailing list archives
Re: DNS caches that support partitioning ?
From: Chris Woodfield <rekoil () semihuman com>
Date: Sun, 19 Aug 2012 13:00:49 -0700
What Patrick said. For large sites that offer services in multiple data centers on multiple IPs that can individually fail at any time, 300 seconds is actually a bit on the long end. -C On Aug 18, 2012, at 3:43 PM, Patrick W. Gilmore <patrick () ianai net> wrote:
On Aug 18, 2012, at 8:44, Jimmy Hess <mysidia () gmail com> wrote:And I say that, because some very popular RRs have insanely low TTLs. Case in point: www.l.google.com. 300 IN A 74.125.227.148 www.l.google.com. 300 IN A 74.125.227.144 www.l.google.com. 300 IN A 74.125.227.146 www.l.google.com. 300 IN A 74.125.227.145 www.l.google.com. 300 IN A 74.125.227.147 www.l.google.com. 300 IN A 74.125.227.148Different people have different points of view. IMHO, if Google losses a datacenter and all users are stuck waiting for a long TTL to run out, that is Very Bad. In fact, I would call even 2.5 minutes (average of 5 min TTL) Very Bad. I'm impressed they are comfortable with a 300 second TTL. You obviously feel differently. Feel free to set your TTL higher. -- TTFN, patrick
Current thread:
- DNS caches that support partitioning ? John Levine (Aug 17)
- Re: DNS caches that support partitioning ? Andrew Sullivan (Aug 17)
- Re: DNS caches that support partitioning ? valdis . kletnieks (Aug 17)
- Re: DNS caches that support partitioning ? Michael Thomas (Aug 17)
- Re: DNS caches that support partitioning ? Jimmy Hess (Aug 18)
- Re: DNS caches that support partitioning ? Patrick W. Gilmore (Aug 18)
- Re: DNS caches that support partitioning ? Chris Woodfield (Aug 19)
- Re: DNS caches that support partitioning ? Mark Andrews (Aug 19)
- Re: DNS caches that support partitioning ? William Herrin (Aug 19)
- Re: DNS caches that support partitioning ? Jimmy Hess (Aug 19)
- Re: DNS caches that support partitioning ? Gary Buhrmaster (Aug 19)
- Return two locations or low TTL [was: DNS caches that support partitioning ?] Patrick W. Gilmore (Aug 20)
- Re: Return two locations or low TTL [was: DNS caches that support partitioning ?] Dobbins, Roland (Aug 20)
- Re: Return two locations or low TTL [was: DNS caches that support partitioning ?] Patrick W. Gilmore (Aug 20)
- Re: Return two locations or low TTL [was: DNS caches that support partitioning ?] Dobbins, Roland (Aug 20)
- Re: Return two locations or low TTL [was: DNS caches that support partitioning ?] Patrick W. Gilmore (Aug 20)
- Re: DNS caches that support partitioning ? valdis . kletnieks (Aug 17)
- Re: Return two locations or low TTL [was: DNS caches that support partitioning ?] Mark Andrews (Aug 20)
- Re: DNS caches that support partitioning ? Andrew Sullivan (Aug 17)