As for throughput, when estimating the latency overhead associated with DRBD, there are some important natural limitations to consider:
The sum of the two establishes the theoretical latency minimum incurred to DRBD. DRBD then adds to that latency a slight additional latency overhead, which can be expected to be less than 1 percent.
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Latency may be influenced by a number of other factors, including CPU cache misses, context switches, and others. |