Created attachment 1958626 [details] RBD PVC Example Describe the issue: We're seeing more cases in support with damaged/unrecoverable CephFS/MDS issues that usually correlate with a database application (not necessarily PostgreSQL) being hosted on a CephFS PV. Additionally, CephFS has difficulties with workloads with very high file counts (millions of small objects), even sometimes with the fsGroupChangePolicy: "OnRootMismatch" applied. Describe the task you were trying to accomplish: Would like to change the wording in the product documentation. Suggestions for improvement: Existing wording: NOTE: Running PostgresSQL workload on CephFS persistent volume is not supported and it is recommended to use RADOS Block Device (RBD) volume. Recommended Change: NOTE: Running any database workloads on a CephFS persistent volume is not supported (e.g. RDBMSs, NoSQL, PostgreSQL, Mongo, RocksDB, etc.) and it is recommended to use RADOS Block Device (RBD), storageclass ocs-storagecluster-ceph-rbd volumes instead (NOTE: ceph-rbd supports both block and filesystem mode). Additionally, it's strongly encouraged for applications workloads that yield high file counts (millions of small objects) to utilize ceph-rbd as well. Document URL: https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.12/html-single/planning_your_deployment/index#introduction-to-openshift-data-foundation-4_rhodf Chapter/Section Number and Title: Chapter 1. Introduction to OpenShift Data Foundation, and scroll down to the first note. Product Version: ODF v4.x Environment Details: N/A Any other versions of this document that also needs this update: All ODF versions. Additional information:
Good Afternoon, Second thought, I think it would be a good idea if we simply have this KCS[1] linked in the section of the documentation I created this doc BZ for[2]. 1. https://access.redhat.com/solutions/7003415 2. https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.12/html-single/planning_your_deployment/index#introduction-to-openshift-data-foundation-4_rhodf Regards, Craig Wayman TSE Red Hat OpenShift Data Foundations (ODF) Customer Experience and Engagement, NA