I prefer to run separately. I collocate only rgw,mgr,mon. Istvan Szabo Senior Infrastructure Engineer --------------------------------------------------- Agoda Services Co., Ltd. e: istvan.szabo@agoda.com<mailto:istvan.szabo@agoda.com> --------------------------------------------------- On 2021. May 25., at 7:52, Tuffli, Chuck <chuck.tuffli@hpe.com> wrote: I found a warning in Red Hat documentation regarding OSD and RBD: Ceph Block Devices must be deployed on separate nodes from the Ceph Monitor and OSD nodes. Running kernel clients and kernel server daemons on the same node can lead to kernel deadlocks. [1] It was hard to tell from the documentation if this is still true as some Rook documentation [2] mentioned a solution. Is having an RBD on the same node as the OSD's still a no-no or is it OK with the conditions listed in the Rook docs (i.e. patched kernel + no XFS)? TIA! --chuck [1] https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/2/html/in... [2] https://rook.io/docs/rook/v1.6/ceph-common-issues.html#a-worker-node-using-r... _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io ________________________________ This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses.