Install and enable JNA for improving Cassandra performance

Mar 6, 2017 Cassandra 中文版

There are various ways to improve the performance of Cassandra. Using JNA (Java Native Access) is one way to improve Cassandra memory usage. Thus, this tutorial is about how to install and set JNA for Cassandra.

Prerequisite

Luckily, the Spotify team already made a great Dockerfile for Cassandra, and I’m going to use it as a sandbox environment in this tutorial. So, make sure you have Docker installed.

Run Cassandra

Let’s run a Cassandra container:

# Run Cassandra as a standalone service, and open the port 9160 and 9042
docker run -d \
           -p 9160:9160 \
           -p 9042:9042 \
           --ulimit memlock=-1:-1
           --name cassandra spotify/cassandra

Install and set JNA (Java Native Access)

Use apt-get to install JNA:

# Install JNA
apt-get install -y libjna-java

# Create a symbolic link
ln -s /usr/share/java/jna.jar /usr/share/cassandra/lib/

Restart the Cassandra container

To make sure JNA will work correctly, restart the Cassandra container:

# Command: docker restart [container-name]
docker restart cassandra

If everything goes well, you will get a message (JNA mlockall successful) means JNA is enabled successfully. To view Cassandra’s log:

# Command: docker logs -f [container-name]
docker logs -f cassandra

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