Hadoop partitioning deals with questions about how hadoop decides which key/value pairs are to be sent to which reducer (partition).
Can any one explain me how secondary sorting works in hadoop ? Why must one use GroupingComparator and how does it …
hadoop mapreduce hadoop-partitioningI would like to know why grouping comparator is used in secondary sort of mapreduce. According to the definitive guide …
hadoop mapreduce hadoop-partitioningi have an external partitioned table named employee with partition(year,month,day), everyday a new file come and seat …
hive hadoop-partitioningAs everyone knows partitioners in Spark have a huge performance impact on any "wide" operations, so it's usually customized in …
apache-spark partitioning hadoop-partitioningDoes the Hadoop split the data based on the number of mappers set in the program? That is, having a …
hadoop mapreduce hadoop-partitioningI am using latest AWS Hive version 0.13.0. FAILED: ParseException: cannot recognize input near 'exchange' 'string' ',' in column specification …
hadoop amazon-web-services hive amazon-emr hadoop-partitioningI'm new on Impala, and I'm trying to understand how to delete records from a table... I've tried looking for …
hadoop impala hadoop-partitioningI was able to successfully change the wordcount program in hadoop to suit my requirement. However, I have another situation …
hadoop hadoop-partitioningI am trying to create a table in Hive CREATE TABLE BUCKET_TABLE AS SELECT a.* FROM TABLE1 a LEFT …
hadoop hive hiveql bucket hadoop-partitioningHow to recover partitions in easy fashion. Here is the scenario : Have 'n' partitions on existing external table 't' Dropped …
hive hdfs hql hadoop-partitioning