加州打算直接從法律上規定從 2020 年開始的新房子都要有太陽能：「California set to become first US state requiring solar panels on new homes」。
The state’s Energy Commission is due to vote next week on new energy standards that would require virtually all new homes to be constructed with solar panels from 2020.
如果通過的話，從 20% 直接變成強制性的 100%：
Currently around 20 per cent of single-family homes are constructed with solar capacity built in, but if the new standards are approved as expected this proportion will rise sharply.
AWS CodeDeploy 推出了 BlueGreenDeployment 的功能：「AWS CodeDeploy Introduces Blue/Green Deployments」。
BlueGreenDeployment 的目的不計成本想辦法把上線的 downtime 壓到最低，而且當出問題時 rollback 的時間壓到最低的方法：
One of the challenges with automating deployment is the cut-over itself, taking software from the final stage of testing to live production. You usually need to do this quickly in order to minimize downtime.
Blue-green deployment also gives you a rapid way to rollback - if anything goes wrong you switch the router back to your blue environment.
其實就是直接跑兩個環境 (所以成本比較高)，一套跑舊的一套跑新的，然後在前面的 load balancer 切換：
The blue-green deployment approach does this by ensuring you have two production environments, as identical as possible.