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发布于 : Nov 10, 2015
这一条目不在当前版本的技术雷达中。如果它出现在最近几期中,那么它很有可能仍然具有相关参考价值。如果这一条目出现在更早的雷达中,那么它很有可能已经不再具有相关性,我们的评估将不再适用于当下。很遗憾我们没有足够的带宽来持续评估以往的雷达内容。 了解更多
Nov 2015
Assess ? 在了解它将对你的企业产生什么影响的前提下值得探索

Building systems using microservices requires us to think more deeply about failure isolation and testing. *TLA+ *is a formal specification language that can be useful in both these scenarios. For failure isolation, TLA+ can be used to identify invariants in your system that can be monitored directly. An invariant can be the ratio of number of requests to one service to the number of requests to a second service, for example. Any change in this ratio would lead to an alert. TLA+ is also being used to identify subtle design flaws in distributed systems. Amazon, for example, used model-checking based on a formal specification written in TLA+ to identify subtle bugs in Dynamo DB before it was released to the public. For most systems, the investment required to create the formal specification and then perform model checking is probably too great; however, for critical systems - complex ones, or those with many users - we think it’s very valuable to have another tool in our toolbox.


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