Recently I was asked how to deal with unbalanced input of reduce task. I thought for while and try to redistribute the data, but didn\'t come up with a goo开发者_运维知识库d solution. Any advice?Actua
A 开发者_高级运维UDF used some external resource files, then it error: \"java.io.FileNotFoundException: resource/placeMap.txt (No such file or directory)\",
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Quick Hive/Hadoop question from a new user. I have a DOUBLE column that has \"1.8E8\" for value, does it mean I reached the max value for DOUBLE?开发者_运维技巧
I have list of strings. (pretty big list of ids and strings scattered in 4-5 big files. around a GB each). These strings are formatted like this:
I\'m trying to monitor different cluster nodes, but everytime I have to ssh -X to the node and start the browser to take a look at the status information.
I wrote a relatively simple map-reduce program in Hadoop platform (cloudera distribution). Each Map & Reduce write some diagnostic information to standard ouput besides the regular map-reduce task
i use grails-1.3.2 and gorm-hbase-0.2.4 plugin. Sometimes i need to change tables structure(add new tables or columns).
The input file to my hadoop M/R job is a text file in which the records are separated by tab character \'\\t\' instead of newline \'\\n\'. How can I instruct hadoop to split using the tab character as
Within my mapper I\'d like to call external software installed on the worker node outside of the HDFS.Is this possible?What is the best way to do this?
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