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Improvement AreaPerformance Recommendations 
BAM data receiver nodes
  • Xms1024m -Xmx1024m -XX:MaxPermSize=512m
  • Change the /etc/security/limits.conf
    • soft nofile 4096
    • hard nofile 65535
 
BAM analyzer nodesXms1024m -Xmx1024m -XX:MaxPermSize=512m 
Dashboard nodesXms1024m -Xmx1024m -XX:MaxPermSize=512m 
Hadoop nodes
  • Recommended OS: Linux
  • At least 10 GB storage capacity in each node
  • At least 100 Mbps network bandwidth
  • Set hadoop.root.logger=ERROR
 
Cassandra nodes
  • Have separate disks for your commit log and data dirs (sstables)

  • Set the Heap memory as follows:

    System memoryHeap size
    Less than 2 GB1/2 of system memory
    2-4 GB1 GB
    More than 4 GB1/4 system memory, but not more than 8GB

  • Set following configuration in cassandra.yaml according to your hardware resources:

    • concurrent_reads: 4 * no of cores
    • concurrent_writes: 8 * no of CPU cores