YugaByte DB sample apps

This repository emulates various workloads against YugaByte DB. YugaByte DB is a multi-model database that supports:

• PostgreSQL (sharded, scale-out SQL)
• YCQL (Cassandra compatible API with indexes, transactions and the JSONB data type)
• YEDIS (Redis compatible API with elasticity and persistence).

The sample apps here have drivers compatible with the above and emulate a number of workloads.

App Name	Description
CassandraHelloWorld	A very simple app that writes and reads one employee record into an 'Employee' table
CassandraKeyValue	Sample key-value app built on Cassandra with concurrent reader and writer threads.
CassandraBatchKeyValue	Sample batch key-value app built on Cassandra with concurrent reader and writer threads.
CassandraBatchTimeseries	Timeseries/IoT app built that simulates metric data emitted by devices periodically.
CassandraTransactionalKeyValue	Key-value app with multi-row transactions. Each write txn inserts a pair of unique string keys with the same value.
CassandraTransactionalRestartRead	This workload writes one key per thread, each time incrementing it's value and storing it in array.
CassandraStockTicker	Sample stock ticker app built on CQL. Models stock tickers each of which emits quote data every second.
CassandraTimeseries	Sample timeseries/IoT app built on CQL. The app models users with devices, each emitting multiple metrics per second.
CassandraUserId	Sample user id app built on Cassandra. The app writes out 1M unique user ids
CassandraPersonalization	User personalization app. Writes unique customer ids, each with a set of coupons for different stores.
CassandraSecondaryIndex	Secondary index on key-value YCQL table. Writes unique keys with an index on values. Query keys by values
CassandraUniqueSecondaryIndex	Sample key-value app built on Cassandra. The app writes out unique string keys
RedisKeyValue	Sample key-value app built on Redis. The app writes out unique string keys each with a string value.
RedisPipelinedKeyValue	Sample batched key-value app built on Redis. The app reads and writes a batch of key-value pairs.
RedisHashPipelined	Sample redis hash-map based app built on RedisPipelined for batched operations.
RedisYBClientKeyValue	Sample key-value app built on Redis that uses the YBJedis (multi-node) client instead
SqlInserts	Sample key-value app built on PostgreSQL with concurrent readers and writers. The app inserts unique string keys
SqlUpdates	Sample key-value app built on PostgreSQL with concurrent readers and writers. The app updates existing string keys
SqlSecondaryIndex	Sample key-value app built on postgresql. The app writes out unique string keys
SqlSnapshotTxns	Sample key-value app built on postgresql. The app writes out unique string keys

Running the apps

For help, simply run the following:

$ java -jar target/yb-sample-apps.jar --help

You should see the set of workloads available in the app.

To get details on running any app, just pass the app name as a parameter to the --help flag:

$ java -jar target/yb-sample-apps.jar --help CassandraKeyValue
1 [main] INFO com.yugabyte.sample.Main  - Starting sample app...
Usage and options for workload CassandraKeyValue in YugaByte DB Sample Apps.

 - CassandraKeyValue :
   -----------------
		Sample key-value app built on Cassandra with concurrent reader and writer threads.
		 Each of these threads operates on a single key-value pair. The number of readers
		 and writers, the value size, the number of inserts vs updates are configurable.

		Usage:
			java -jar yb-sample-apps.jar \
			--workload CassandraKeyValue \
			--nodes 127.0.0.1:9042

		Other options (with default values):
			[ --num_unique_keys 1000000 ]
			[ --num_reads -1 ]
			[ --num_writes -1 ]
			[ --value_size 0 ]
			[ --num_threads_read 24 ]
			[ --num_threads_write 2 ]
			[ --table_ttl_seconds -1 ]

Building the apps

You need the following to build:

• Java 1.8 or above
• Maven version 3.3.9 or above

To build, simply run the following:

$ mvn -DskipTests -DskipDockerBuild package

You can find the executable one-jar at the following location:

$ ls target/yb-sample-apps.jar
target/yb-sample-apps.jar

To docker image with the package, simply run the following:

$ mvn package