nanog mailing list archives
Re: How to achieve application reliability
From: James Smith <jsmith () dxstorm com>
Date: Sun, 5 Dec 1999 02:02:53 -0500 (EST)
With stuff like that you're still faced with a problem. What if a customer has been directed to a server that is working fine to begin with, and then dies. The 3DNS stuff will make the changes to avoid the server, but the customer's browser won't pick up those DNS changes and they'll be left hanging. Also, you'd have to keep the DNS TTL low or else you have to deal with the DNS info being caching on ISP server. To further complicate things the TTL is only the minimum required time to live. I've discovered instances where cached DNS information will be stored for weeks, even though the authoritative DNS TTL was originally set to a day. Our only alternative is to eliminate every single-point failure with stuff like high availability clustering, redundant feeds, battery backups, nuclear reactors, physical separate sites on different planets, etc. :-) (Pardon me, it's 2:00am and I'm getting punching) -- James Smith, CCNA Network/System Administrator DXSTORM.COM http://www.dxstorm.com/ DXSTORM Inc. 2140 Winston Park Drive, Suite 203 Oakville, ON, CA L6H 5V5 Tel: 905-829-3389 (email preferred) Fax: 905-829-5692 1-877-DXSTORM (1-877-397-8676) On Sat, 4 Dec 1999, Jason A. Mills wrote:
Isn't this why you use things like F5/3DNS? Just curious... -Jason On Sun, 5 Dec 1999, James Smith wrote:... internetsecure to type in the credit card. The problem with Round-Robin DNS is the possibility of the consumer's web browser picking up an IP address of a server that is down. If it was a real payment gateway, your ... -- James Smith, CCNAJason A. Mills phyxis () rottweiler org "We all live in a house on fire, no fire department to call, no way out, just the upstairs window to look out of while the fire burns the house down with us trapped, locked inside it." -- Tennessee Williams
Current thread:
- How to achieve application reliability Sean Donelan (Dec 04)
- Re: How to achieve application reliability James Smith (Dec 04)
- <Possible follow-ups>
- Re: How to achieve application reliability Sean Donelan (Dec 04)
- Re: How to achieve application reliability James Smith (Dec 04)
- Re: How to achieve application reliability James Smith (Dec 04)
- Re: How to achieve application reliability Sean Donelan (Dec 05)
- Re: How to achieve application reliability James Smith (Dec 05)
- RE: How to achieve application reliability Roeland M.J. Meyer (Dec 05)