Hadoop是一個常用的計算框架，可以在大型商品叢集上提供及時且符合經濟效益的數據處理。它減輕了程式開發者處理分散式程式的負擔，並且圍繞它發展出了一個大數據解決方案的生態系統。然而，Hadoop的作業執行時間很大程度上取決於其運行時配置和資源選擇。Hadoop提供了超過100個作業參數設置，以及雲或虛擬化計算環境中不同的資源實例選項，運行Hadoop作業仍需要大量的專業知識和經驗。為了因應這些挑戰，我們利用深度神經網絡及基於歷史執行數據來預測Hadoop作業時間，並且提出了優化方法來減少作業執行的時間和成本。結果證實，我們的預測方法達到了將近90％的時間預測精準度，並明顯超出了其他三種最先進的基於回歸的預測方法。基於時間預測，我們提出的配置搜索方法和作業調度演算法成功地將單個Hadoop作業的執行時間縮短了2倍以上，並且將處理一批Hadoop作業的執行成本降低2.7倍以上，與此同時，無需額外的人為知識或介入。

Hadoop is a popular computing framework to deliver timely and cost-effective data processing on a large cluster of commodity machines. It relieves the burden of the programmers dealing with distributed programming, and an ecosystem of Big Data solutions have developed around it. However, Hadoop's job execution time can be greatly depending on its runtime configurations and resource selections. Given more than 100 job configuration settings from Hadoop, and diverse resource instance options in a cloud or virtualized computing environment, running Hadoop jobs still requires a substantial amount of expertise and experience. To address this challenge, we applied deep neural network to predict Hadoop job time based on historical execution data, and we proposed optimization methods to reduce job execution time and cost. The results showed that our prediction method achieved almost 90\% of time prediction accuracy and clearly out-performed three other state-of-art regression-based prediction methods. Based on the time prediction, our proposed configuration search method and job scheduling algorithm successfully shorten the execution time of a single Hadoop job by more than 2 times and reduce the execution cost of processing a batch of Hadoop jobs by more than 2.7 times without relying on any human knowledge and intervention.

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