A system administrator notices that a Linux server is experiencing slow performance, specifically in disk operations. Upon investigating, the administrator discovered that the I/O wait time is considerably high. Which of the following actions is the BEST course of action to reduce the high latency affecting the system?
Increase the CPU clock speed to process I/O operations faster.
Deploy additional network interfaces to balance the I/O load.
Replace the current I/O scheduler with one that is better optimized for the system's workload.
Decrease the amount of RAM in the system to reduce the memory available for disk caching.
In this scenario, the best course of action is to replace the current I/O scheduler with one that is optimized for the particular workload characteristics (e.g. CFQ, Deadline, NOOP). The I/O scheduler is responsible for ordering disk access to improve performance. Some schedulers are better suited for certain workloads than others, and so choosing the correct one can potentially reduce I/O wait times and thus lower latency.
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