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[CARBONDATA-3008] Optimize default value for multiple temp dir
The feature of supporting multiple temp dirs for data loading is introduced about 1.5 year ago. This feature is to solve the single disk hot spot problem. After one year's verification in real production environment, the feature turns out to be effective and correct. So in this commit, we change the default behavior of this feature -- change it from disable to enable by default. Moreover, we remove the parameter 'carbon.use.multiple.temp.dir' and only keep the parameter 'carbon.use.local.dir' and enable it by default. If the cluster is not configured with yarn-local-dirs, the java temp dir will be used. This closes #2824
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