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《Spark-Yarn-Cloudera》.pdf
Can’t We All Just Get Along?
Spark and Resource Management on Hadoop
Introducons
• Soware engineer at Cloudera
• MapReduce, YARN, Resource management
• Hadoop commier
Introducon
• Spark as a first class data processing framework
alongside MR and Impala
• Resource management
• What we have already
• What we need for the future
Bringing Computaon to the Data
• Users want to
• ETL a dataset with Pig and MapReduce
• Fit a model to it with Spark
• Have BI tools query it with Impala
• Same set of machines that hold data must also host
these frameworks
Cluster Resource Management
• Hadoop brings generalized computaon to big data
• More processing frameworks
• MapReduce, Impala, Spark
• Some workloads are more important than others
• A cluster has finite resources
• Limited CPU, memory, disk and network bandwidth
• How do we make sure each workload gets the
resources it deserves?
How We See It
Impala MapReduce Spark
HDFS
How They Want to See It
Engineering - 50% Finance - 30% Marketing - 20%
Spark Spark
Spark MR
MR MR
Impala
Impala Impala
HDFS
Central Resource Management
Impala MapReduce Spark
YARN
HDFS
YARN
• Resource manager and scheduler for Hadoop
• “Container” is a process scheduled on the cluster
with a resource allocaon (amount MB, # cores)
• E
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