如何防止Apache Pig输出空文件?

问题描述

我有一个从 HDFS 上的目录读取数据的 Pig 脚本.数据存储为 avro 文件.文件结构如下:

I have a pig script that reads data from a directory on HDFS. The data are stored as avro files. The file structure looks like:

DIR--
   --Subdir1
   --Subdir2
   --Subdir3
   --Subdir4

在 Pig 脚本中，我只是简单地进行加载、过滤和存储.它看起来像:

In the pig script I am simply doing a load, filter and store. It looks like:

items = LOAD path USING AvroStorage()
items = FILTER items BY some property
STORE items into outputDirectory using AvroStorage()

现在的问题是 pig 在输出目录中输出了许多空文件.我想知道是否有办法删除这些文件?谢谢！

The problem right now is that pig is outputting many empty files in the output directory. I am wondering if there's a way to remove those files? Thanks!

推荐答案

对于 pig 版本 0.13 及更高版本，您可以设置 pig.output.lazy=true 以避免创建空文件.(https://issues.apache.org/jira/browse/PIG-3299)

For pig version 0.13 and later, you can set pig.output.lazy=true to avoid creating empty files. (https://issues.apache.org/jira/browse/PIG-3299)

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