Teamwork Cloud no longer supports Apache Cassandra 3.x, therefore before upgrading Teamwork Cloud, you need to upgrade Casandra to version 4.x (we recommend using Cassandra 4.0.3). If you are running Cassandra in a cluster environment, upgrade it one node at a time to allow clients to access the cluster during the process. | Note |
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| - Make sure that all the nodes are ready.
- Create a snapshot of your data for backup.
- Upgrade sstables by running the command nodetool upgradesstables on each node.
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To upgrade Cassandra
IMPORTANT! Flush memtables to the disk by executing the following command: | Code Block |
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| language | bash |
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| theme | DJango |
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| linenumbers | true |
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| nodetool drain |
Shut down the 3.x node. - Backup the Cassandra configuration file at: /etc/cassandra/default.conf/cassandra.yaml
Make a note of the existing cluster name and token count with the following command: | Code Block |
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| language | bash |
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| theme | DJango |
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| linenumbers | true |
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| grep -E 'num_tokens:|cluster_name:' /etc/cassandra/default.conf/cassandra.yaml |
Uninstall/remove Cassandra 3.x (example with yum package manager) | Code Block |
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| language | bash |
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| theme | DJango |
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| linenumbers | true |
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| sudo yum remove -y cassandra |
- Install Cassandra 4.x. for installation instructions, see Installing Cassandra on Linux or Installing Cassandra on Windows.
Configure the 4.x node to point to the appropriate data files in the /etc/cassandra/default.conf/cassandra.yaml settings as shown in the example below. | Code Block |
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| data_file_directories:
- /data/data
commitlog_directory: /logs/commitlog
hints_directory: /data/hints
saved_caches_directory: /data/saved_caches |
Check the cluster name and token count in cassandra.yaml. If needed, replace the default values with the values set in 3.x. The example below shows the default values for a Cassandra 4.x installation. | Code Block |
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| cluster_name: 'Test Cluster'
num_tokens: 16 |
| Note |
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| title | Cassandra 4 Configuration |
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| The cluster name and token count must match those values set in Cassandra 3.x. |
- Start the Cassandra 4.x node.
- Check the log files for errors.
- After the upgrade is complete, perform required post-installation configuration changes. For more information, see Post-installation steps on Linux or Post-installation steps on Windows.
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