In nautilus min 4GB per disk . In case of ssd/nvme 6-12GB per disk. 8GB per disk is a good way to get performance +2/4GB for the OS. Regards, Manuel -----Mensaje original----- De: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> En nombre de jesper@xxxxxxxx Enviado el: viernes, 7 de junio de 2019 19:36 Para: Jorge Garcia <jgarcia@xxxxxxxxxxxx> CC: ceph-users@xxxxxxxxxxxxxx Asunto: Re: OSD RAM recommendations > I'm a bit confused by the RAM recommendations for OSD servers. I have > also seen conflicting information in the lists (1 GB RAM per OSD, 1 GB > RAM per TB, 3-5 GB RAM per OSD, etc.). I guess I'm a lot better with a > concrete example: I think it depends on the usagepattern - the more the better. When configured the OSD daemon will use the memory as disk-caching for reads - I have a simiar setup 7 hosts x 10TB x 12 disk - with 512GB each This serves an "active dataset" to a HPC cluster, where it is hugely beneficial to be able to cache the "hot data" which is 1.5TB'ish. If your "hot" dataset is smaller, then less will do as well. Jesper _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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