Hadoop
admins need general operational expertise such as good troubleshooting skills,
understanding of system's capacity, bottlenecks, basics of memory, CPU, OS,
storage, and networks.
Good
Knowledge of Linux
Security
Configuration
Tuning
Troubleshooting
Monitoring
Familiarity
with open source configuration management (Chef, for example)
Scripting
like PERL/ BASH is important
Able to
deploy Hadoop Cluster, add / remove nodes, figure out why a job is stuck or
failing
Configure
and tune cluster, monitoring critical parts of the cluster
Understand
schedulers and configuration of it meet SLA and even backup
process