Chapter 7, Keeping Things Running
Pop quiz – setting up a cluster
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Q1 |
5. Though some general guidelines are possible and you may need to generalize whether your cluster will be running a variety of jobs, the best fit depends on the anticipated workload. |
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Q2 |
4. Network storage comes in many flavors but in many cases you may find a large Hadoop cluster of hundreds of hosts reliant on a single (or usually a pair) of storage devices. This adds a new failure scenario to the cluster and one with a less uncommon likelihood than many others. Where storage technology does look to address failure mitigation it is usually through disk-level redundancy. These disk arrays can be highly performant but will usually have a penalty on either reads or writes. ... |
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