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confusion over storage for logging



I am confused over persistent storage for logging (elasticsearch).

The latest advanced installer docs [1] specifically describes how to define using NFS for persistent storage, but the docs for "aggregating container logs" [2] says that NFS should not be used (except in one particular scenario) and seems to suggest that the only really suitable scenario is to use a volume (disk) directly mounted to each logging node.

Could someone clarify the situtation?

Tim


[1] https://docs.openshift.org/latest/install_config/install/advanced_install.html#advanced-install-cluster-logging

[2] https://docs.openshift.org/latest/install_config/aggregate_logging.html#aggregated-elasticsearch



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