nanog mailing list archives
Re: Content Delivery Networks
From: "Chris L. Morrow" <christopher.morrow () verizonbusiness com>
Date: Tue, 14 Aug 2007 14:57:08 +0000 (GMT)
On Tue, 14 Aug 2007, [iso-8859-1] Bjørn Mork wrote:
"Chris L. Morrow" <christopher.morrow () verizonbusiness com> writes:This is still a client issue as, hopefully, the cache-resolvers don't funnel their business through nscd save when applications on them need lookups... (things like ping/telnet/traceroute/blah)nscd may represent a problem if the application in question is a http-proxy without it's own resolver. There's also a number of more-or-less broken http-proxies doing their own resolver caching regardless of actual TTL.
that's fine, that's still a client problem, not a cache-resolver problem... These devices look 'upstream' for a cache-resolver to do their dirty work, these just add an extra layer of indirection for the CDN to figure out (my client is in SFO, my proxy is in IAD, my cache-resolver is in CHI).
Such applications represent a problem wrt any DNS-based load balancing, including CDNs, since they can serve a large number of end-users, redirecting them to the "wrong" address long after the TTL should have expired.
Yup, people should be aware of what the systems in their path are doing, or as was mentioned earlier, have lots of exceptions on the CDN side.
Current thread:
- Re: Content Delivery Networks, (continued)
- Re: Content Delivery Networks John Levine (Aug 10)
- Re: Content Delivery Networks Patrick W. Gilmore (Aug 10)
- Re: Content Delivery Networks Crist Clark (Aug 10)
- Message not available
- Re: Content Delivery Networks Rodney Joffe (Aug 10)
- Re: Content Delivery Networks Chris L. Morrow (Aug 10)
- Message not available
- Re: Content Delivery Networks Chris L. Morrow (Aug 11)
- Re: Content Delivery Networks Florian Weimer (Aug 13)
- Re: Content Delivery Networks Rodney Joffe (Aug 13)
- Re: Content Delivery Networks Chris L. Morrow (Aug 13)
- Re: Content Delivery Networks Bjørn Mork (Aug 14)
- Re: Content Delivery Networks Chris L. Morrow (Aug 14)
- Re: Content Delivery Networks Warren Kumari (Aug 10)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Daniel Roesen (Aug 03)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Giuliano (UOL) (Aug 03)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E JP Velders (Aug 11)