Hi Junguk, Topology metric consumer receives task level metrics for all tasks, and SystemBolt is a task which exists only one for all workers to gather worker specific metrics. Please refer http://storm.apache.org/releases/1.0.1/Metrics.html for more details on metrics feature. Just a curious, do you have a reason to disable SystemBolt?
Regarding __acker, if you set acker to 0 by modifying config and it doesn't work, please file a JIRA issue. Thanks, Jungtaek Lim (HeartSaVioR) 2016년 7월 6일 (수) 오전 11:01, Junguk Cho <[email protected]>님이 작성: > One more following question about __acker bolt. > > Even though I created un-anchored topology ( > > http://storm.apache.org/releases/current/Guaranteeing-message-processing.html > ), > it still created __acker bolt in each worker. > > Are there reasons? > > Thanks, > Junguk > > 2016-07-05 21:45 GMT-04:00 Junguk Cho <[email protected]>: > > > Hi, > > > > Thank you for reply. > > I checked the code. > > > > I have some questions. > > There is no code for sending data to "central node" by using "emit-like > > function". > > Who will get the worker level metrics from this SystemBolt? > > > > It seemed we cannot disable this SystemBolt. > > Can we also disable this in storm.yaml? > > > > > > Thanks, > > Junguk > > > > 2016-06-28 9:57 GMT-04:00 Bobby Evans <[email protected]>: > > > >> Every worker gets a SystemBolt. The bolt does not really process any > >> data, it just provides a set of worker level metrics. > >> > >> > https://github.com/apache/storm/blob/master/storm-core/src/jvm/org/apache/storm/metric/SystemBolt.java > >> - Bobby > >> > >> On Monday, June 27, 2016 10:42 AM, Junguk Cho <[email protected]> > >> wrote: > >> > >> > >> Hi, > >> > >> In one worker, by default Storm creates one-executor and > >> one-executor-disruptor threads pair. > >> > >> In detail, it created __system, __acker, and __bolt or __spout. > >> I understood __acker and __bolt or __spout, but what is the roles of > >> __system and __system-disruptor threads? > >> > >> > >> Another question is a benchmark. > >> I found one from Yahoo which they used it for netty vs zeromq test ( > >> https://github.com/yahoo/storm-perf-test). > >> > >> Are there well built benchmark like this to measure storm performances? > >> > >> Thanks, > >> Junguk > >> > >> > >> > >> > > > > >
