nanog mailing list archives
Re: FYI Netflix is down
From: Jimmy Hess <mysidia () gmail com>
Date: Sat, 30 Jun 2012 12:41:02 -0500
On 6/30/12, Todd Underwood <toddunder () gmail com> wrote:
On Jun 30, 2012 11:23 AM, "Seth Mattinen" <sethm () rollernet us> wrote:But haven't they all been cascading failures?No. They have not. That's not what that term means. 'Cascading failure' has a fairly specific meaning that doesn't imply resilience in the face of decomposition into smaller parts. Cascading
Not sure where you're going there; Cascading failures are common, but fortunately are usually temporary or have some kind of scope limit. Cascading just means you have a dependency between components, where the failure of one component may result in the failure of a second component, the failure of the second component results in failure of a third component, and this process continues until no more components are dependent or no more components are still operating. This can happen to the small pieces inside of one specific system, causing that system to collapse. It's just as valid to say Cascading failure is across across larger/more complex pieces of different higher level systems, where the components of one system aren't sufficiently independent of those in other systems, causing both systems to fail. Your application logic can be a point of failure, just as readily as your datacenter can. Cascades can happen at a higher level where entire systems are dependant upon entire other systems. And it can happen Organizationally, External dependancy risk occurs when an entire business is dependant on another organization (such as product support), to remotely administer software they sold, and the subcontracter of the product support org. stops doing their job, or a smaller component (one member of their staff) becomes a rogue/malicious element. -- -JH
Current thread:
- Re: FYI Netflix is down, (continued)
- Re: FYI Netflix is down Andrew D Kirch (Jun 30)
- Re: FYI Netflix is down joel jaeggli (Jun 30)
- Re: FYI Netflix is down Cameron Byrne (Jun 30)
- Re: FYI Netflix is down Jimmy Hess (Jun 30)
- Re: FYI Netflix is down Randy Bush (Jun 30)
- Re: FYI Netflix is down Lynda (Jun 30)
- Re: FYI Netflix is down Roy (Jun 30)
- Re: FYI Netflix is down Justin M. Streiner (Jun 30)
- Re: FYI Netflix is down Seth Mattinen (Jun 30)
- Re: FYI Netflix is down Todd Underwood (Jun 30)
- Re: FYI Netflix is down Jimmy Hess (Jun 30)
- Re: FYI Netflix is down Seth Mattinen (Jun 30)
- Re: FYI Netflix is down Todd Underwood (Jun 30)
- Re: FYI Netflix is down Jimmy Hess (Jun 30)
- Re: FYI Netflix is down Mike Devlin (Jun 30)
- Re: FYI Netflix is down Seth Mattinen (Jun 30)
- Re: FYI Netflix is down Jared Mauch (Jun 30)
- Re: FYI Netflix is down Scott Howard (Jun 30)
- Re: FYI Netflix is down Todd Underwood (Jun 30)
- Re: FYI Netflix is down Brett Frankenberger (Jun 30)
- Re: FYI Netflix is down William Herrin (Jun 29)