Unfortunately, the ideas we've discussed in previous lectures about the issues that arise with parallelisn are only amplified in the context of minimizing energy usage. In order to handle the same workload with wimpy nodes, you need a bigger cluster. Now, for example, there is a lower tolerance for error in the load balancing because a single node gets overwhelmed more easily. Any amount of communication between nodes becomes a more likely cause for a bottleneck. Since, in the context of a webserver, there's really no acceptable relaxation in the required latency, the software needs to be smarter.
Unfortunately, the ideas we've discussed in previous lectures about the issues that arise with parallelisn are only amplified in the context of minimizing energy usage. In order to handle the same workload with wimpy nodes, you need a bigger cluster. Now, for example, there is a lower tolerance for error in the load balancing because a single node gets overwhelmed more easily. Any amount of communication between nodes becomes a more likely cause for a bottleneck. Since, in the context of a webserver, there's really no acceptable relaxation in the required latency, the software needs to be smarter.
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