Verifying the available disk space
This content applies only to On-premises and Client-managed cloud environments
Ensure the stability and availability of a Cassandra deployment on Pega Platform by providing enough disk space to run compactions.
Starting in Pega Platform version 8.6, the use of an internal Cassandra database is deprecated. On-premises systems that have been updated from earlier versions of Pega Platform can continue to use Cassandra in embedded mode. However, to ensure future compatibility, do not create any new environments using embedded Cassandra.
- In the header of Dev Studio, click .
- On the Decision Data Store landing page, click the status of the node for which you want to check the available disk space.
- In the Disk usage section, verify that the amount of
existing data constitutes less than 40% of the total disk space.The amount of data shown in the Disk usage section refers to data in SSTables, and does not include the disk space that Cassandra uses for compaction.
- If the existing data takes up more than 40% of the total disk space, provide
Cassandra with more disk space by removing obsolete files, or by adding more
disk space.To remove obsolete Cassandra files, in the nodetool utility, run the
nodetool cleanupcommand. For more information about adding additional disk space, see the Apache Cassandra documentation.
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