Dear Ceph users, I've a question regarding the memory recommendations for an OSD node. The official Ceph hardware recommendations say that an OSD node should have 1GB Ram / TB OSD [1] The "Reference Architecture" whitpaper from Red Hat & Supermicro says that "typically" 2GB of memory per OSD on a OSD node is used. [2] According to the recommendation in [1] an OSD node with 24x 8TB OSD disks is "underpowered " when it is equipped with 128GB of RAM. However, following the "recommendation" in [2] 128GB should be plenty enough. I'm wondering which of the two is good enough for a Ceph cluster with 10 nodes using EC (6+3) Thanks for any comment Dietmar [1] http://docs.ceph.com/docs/jewel/start/hardware-recommendations/ [2] https://www.redhat.com/en/files/resources/en-rhst-cephstorage-supermicro-INC0270868_v2_0715.pdf -- _________________________________________ D i e t m a r R i e d e r, Mag.Dr. Innsbruck Medical University Biocenter - Division for Bioinformatics
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