Re: Noisy Neighbor Nozzle CLI - Quickly Determine High Volume Log Producers #loggregator


Adam Hevenor
 

One thing to watch out for using cf nozzle or cf top to try and calculate Noisy Neighbors by reading from the firehose. Reading with a single client can put back pressure on the Loggregator system by being a "slow consumer" (this is especially true if you are on a slow connection). This can cause load in Traffic Controller and Doppler and result in dropped messages. This is fine for small deployments but potentially damaging for large deployments with high rates of Firehose throuhgput. The Noisy Neighbor Nozzle mitigates this by providing a scalable application that can shard the Firehose stream. 

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