jerryking + reliability   4

This Is How We Do It: Ben Horowitz on How Software Testing Has Changed - The CIO Report - WSJ
March 12, 2015 | WSJ |By STEVE ROSENBUSH.

Two trends led to the creation of SignalFx...“It used to be that every server was sacred and if one went down, it was a catastrophe,” Mr. Horowitz said. In the era of the cloud and so-called webscale companies, that no longer should be the case, he contends. “Facebook has over one million servers. If one goes down, it doesn’t matter. What matters is how the app that is being served is performing. Is there a bottleneck or is it doing okay?”...The other big trend behind the creation of SignalFx lay in software development process. In an era of continuous deployment and updates, there’s no time to have IT identify a problem and kick it back to the engineers....“What you really need is software developers looking at how applications are doing. But you have to give developers tools to instrument their own code,” he said.

Such monitoring tools will vary from case to case. “Memory usage, response time .. any number of things may characterize an application tier, or Web tier. You have to be able to express things like that.... “In the old days, from the engineering standpoint, functionality was a huge thing. Now it is a small thing when it comes to testing. Scale and reliability are the big things, and testing has to be in real time.”
Ben_Horowitz  Andreessen_Horowitz  software_development  tools  CIOs  monitoring  SignalFx  scaling  reliability  real-time  testing  control_systems  dashboards  instrumentation_monitoring 
march 2015 by jerryking
Take a page from spy manuals: Grade your informers
September 9, 2006 | Globe & Mail | AVNER MANDELMAN. If
you invest like a sleuth you need informers -- the better they are, the
better your chance of making money. But how to separate good information
sources from the mediocre and the bad? After all, info and advice are
everywhere -- brokers' analysts, newspaper columnists, industry experts,
and best of all, corporate personnel and customers who know the real
score. Lots of sources, not much time to digest them all....view
informers as intelligence sources and grade their performance, as
intelligence services grade theirs. Just how do professional
intelligence services manage it? Here we must go into the realm of
hearsay. The best intelligence services, it is said, rank their
informers by two categories. First is the informer's reliability, based
on his or her record. Second is the informer's own confidence in this
particular info. The first "letter grade" is given by the case officer
-- the agent-runner; the second by the agent.
Avner_Mandelman  security_&_intelligence  information  informants  grading  spycraft  performance  rankings  reliability  confidence_levels  information_sources  assessments_&_evaluations  intelligence_analysts 
may 2011 by jerryking

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