That's not that much of a difference given the overhead of cluster management. I would have thought a job should take minutes before you'll see a performance improvement on using cluster mode?
Kind Regards, Alex. From: saif.a.ell...@wellsfargo.com [mailto:saif.a.ell...@wellsfargo.com] Sent: 15 January 2016 14:29 To: user@spark.apache.org Subject: jobs much slower in cluster mode vs local Hello, In general, I am usually able to run spark submit jobs in local mode, in a 32-cores node with plenty of memory ram. The performance is significantly faster in local mode than when using a cluster of spark workers. How can this be explained and what measures can one take in order to improve such performance? Usually a job that takes 35 seconds in local mode takes around 48 seconds in a small cluster. Thanks, Saif
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