四种工作流的比较

HamakeComparisonWithOtherWorkflowEngines   Phase-Support Updated Jun 6, 2010 by [email protected] The table below attempts to compare Hamake and similar workflow engines for Hadoop (Oozie, Azkaban, Cascading) based on some key features. Although all of these systems could be used to solve similar problems, they differ significantly in design, philosophy, target user profile, usage scenarios, etc. So our feature-wise comparison is in no way conclusive. Please use it as a guideline, but read respective systems documentation to understand better which one is more suitable for your problem. Feature Hamake Oozie Azkaban Cascading workflow discription language XML XML (xPDL based) text file with key/value pairs Java API dependencies mechanism data-driven explicit explicit explicit requires Servlet/JSP container No Yes Yes No allows to track a workflow progress console/log messages web page web page Java API ability to schedule a Hadoop job execution at given time no yes yes yes execution model command line utility daemon daemon API allows to run Pig Latin scripts yes yes yes yes event notification no no no yes requires installation no yes yes no supported Hadoop version 0.18+ 0.20+ currently unknown 0.18+ retries no at workflow node level yes yes ability to run arbitrary commands yes yes yes yes can be run on Amazon EMR yes no currently unknown yes From FAQ: What is the difference between Hamake and Cascading? In short: Cascading is an API, while 'hamake' is an utility. Some differences: hamake does not require any custom programming. It helps to automate running your existing Hadoop tasks and PIG scripts We found hamake especially suitable for incremental processing of datasets You can use 'hamake' to automate tasks written in other languages, for example using Hadoop streaming How Hamake differs from Oozie and Azkaban? Oozie and Azkaban are server-side systems that have to be installed and run as a service. Hamake is a lightweight client-side utility that does not require installation and has very simple syntax for workflow definition. Most importantly, Hamake is built based on dataflow programming principles - your Hadoop tasks execution sequence is controlled by the data.