Demonstration application for understanding response time observability.
The application uses the Couchbase Java SDK. It performs random operations against a Couchbase bucket.
The design has been optimized to generate a high request rate.
Build with
mvn compile
Run with
mvn exec:java -Dexec.args="-h"
For example
mvn exec:java -Dexec.args="-c localhost -b default -u admin -p password"
Or package a jar file and run with a vanilla Java command line.
Run
mvn package
to create
target/rto-1.0.jar
Run with
java -jar target/rto-1.0.jar -c <cluster> -b <bucket> -u <user> -p <password>
Options:
See Options.java for all the options.
-r sets the number of documents taken from the bucket to use in KV operations, which includes mutations and removals.
The documents are cached by the app.
-s sets the sample size logged by the threshold tracer
-K sets the KV timeout.
Operations taking longer than this will get recorded by the threshold tracer.
(This has no effect with other tracers.)
-q sets the number of KV ops to queue before delaying to let them drain.
-d sets the delay time to allow ops to drain. This along with -q throttles generation of ops so as not to overrun the SDK internal queue.
-e selects the operations to run. Look at the enum in App.java for the list. For example, to run just gets, use -e GET.
Examples:
java -Dcom.couchbase.operationTracingEnabled=false -jar target/rto-1.0.jar
runs with tracing completely disabled. (-D sets a system property. See the Couchbase Java SDK docs for these.)
java -jar target/rto-1.0.jar -u admin -p password -K 100 -e GET
runs against localhost using the travel-sample bucket with KV threshold tracer timeout set to 100ms, and only get operations.
java -DJAEGER_REPORTER_LOG_SPANS=true -jar target/rto-1.0.jar -c ec2-54-215-184-156.us-west-1.compute.amazonaws.com -u admin -p password -j localhost -t jaeger
runs with Jaeger tracing enabled (-t) and Jaeger on the localhost (-j localhost).
Licensed under Apache 2.0.