Does it have any measurable effect on resources whether I submit a bunch of hadoop jobs from different client servers or all from the same one? I would think not since all the work is done in the cluster. Is this correct?
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Does it have any measurable effect on resources whether I submit a bunch of hadoop jobs from different client servers or all from the same one? I would think not since all the work is done in the cluster. Is this correct?
It really shouldn’t matter where you submit your jobs from. The client itself doesn’t do much, it uses RPC protocol to contact the services, and then just sits idle until the job is finished.
Also, the most important is what kind of scheduler you use to allocate resource, which is probably going to make the most significant difference and decide which resources to allocate to which job. More on job scheduling here.