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 > > > >
