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SSDs and MapReduce performance

Conclusions of comparing SSDs and HDDs for different cluster scenarios from the cost perspective of performance and storage capacity:

  • For a new cluster, SSDs deliver up to 70 percent higher MapReduce performance compared to HDDs of equal aggregate IO bandwidth.
  • For an existing HDD cluster, adding SSDs lead to more gains if configured properly.
  • On average, SSDs show 2.5x higher cost-per-performance, a gap far narrower than the 50x difference in cost-per-capacity.

The post offers many details of the tests run and also various results. But the 3 bullets above should be enough to drive your decision.

Original title and link: SSDs and MapReduce performance (NoSQL database©myNoSQL)

via: http://blog.cloudera.com/blog/2014/03/the-truth-about-mapreduce-performance-on-ssds/