MapReduce is an algorithm for processing huge datasets on certain kinds of distributable problems using a large number of nodes
I have a map reduce job that connects to HBASE and I can't figure out where I am running into …
java hadoop mapreduce hbase bulkloaderAlthough I use Hadoop frequently on my Ubuntu machine I have never thought about SUCCESS and part-r-00000 files. The output …
hadoop mapreduceI have a collection of md5 in mongodb. I'd like to find all duplicates. The md5 column is indexed. Do …
mongodb mapreduceHi I am a big data newbie. I searched all over the internet to find what exactly uber mode is. …
hadoop mapreduceI have a long history with relational databases, but I'm new to MongoDB and MapReduce, so I'm almost positive I …
mongodb mapreduce nosqlI am reading about MapReduce and the following thing is confusing me. Suppose we have a file with 1 million entries(…
java hadoop mapreduceIn many MapReduce programs, I see a reducer being used as a combiner as well. I know this is because …
mapreduce reducers combinersthanks in advance for any help I am running the following versions: Hadoop 2.2 zookeeper 3.4.5 Hbase 0.96 Hive 0.12 When I go to …
hadoop mapreduce yarn resourcemanagerWhat are the advantages of using NullWritable for null keys/values over using null texts (i.e. new Text(null)). …
java hadoop mapreduceI am trying to write a snappy block compressed sequence file from a map-reduce job. I am using hadoop 2.0.0-cdh4.5.0, …
java hadoop mapreduce sequencefile snappy