https://www.ibm.com/docs/en/db2/11.5.x?topic=rtdsu-recovering-through-db2-purescale-server-upgrade-linux-unix
Use this procedure to recover one or more databases through a Db2 pureScale Linux or UNIX server upgrade.
recoveringpurescaleserverupgradelinux
https://www.ibm.com/docs/en/db2/11.5.x?topic=1159-db2-purescale-feature-enhancements
Db2 11.5.9 continues to build on Db2 pureScale feature support and provides several enhancements.
newpurescale