Home / Software Design / High Availability (HA)
Over the past few days I have been having some issues with my Twitter account. Beyond the well known pauses in the service, outages, etc there are some less known but more annoying problems with twitter search. It turns out that many accounts don’t show up in search at all. Therefore, if you are one …
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Over the last few decades, the technologies we used and the approaches we took to make our systems reliable have undergone a steady evolution. In some cases the technology has just gotten more reliable through quality control at the hardware level (consider an Intel Blade today compared to my 1986 Zenith 8088 that I wrote …
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With all of the talk about reliability, or lack thereof, of SaaS and Cloud based applications, I thought I would write a series on designing applications to be Resilient and Highly Available. The series sort of started with this post “It’s Inadequate Design That Lets Systems Fail, Not Whether They Are SaaS or Deployed in …
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There have been many high profile outages lately which have caught peoples attention. These failures are being used as an argument for why critical systems should remain internal and not be deployed as SaaS or in the Cloud. Some of these outages included Google App Engine’s performance issues in early July , Rackspace’s loss of …
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