Ok, seems better to add all disks to host by hosts with waiting for rebalance between each of them, thx. Istvan Szabo Staff Infrastructure Engineer --------------------------------------------------- Agoda Services Co., Ltd. e: istvan.szabo@agoda.com<mailto:istvan.szabo@agoda.com> --------------------------------------------------- On 2023. Feb 8., at 20:43, Eugen Block <eblock@nde.ag> wrote: Email received from the internet. If in doubt, don't click any link nor open any attachment ! ________________________________ Hi, this is a quite common question and multiple threads exist on this topic, e.g. [1]. Regards, Eugen [1] https://www.mail-archive.com/ceph-users@lists.ceph.com/msg36475.html Zitat von "Szabo, Istvan (Agoda)" <Istvan.Szabo@agoda.com>: Hi, What is the safest way to add disk(s) to each of the node in the cluster? Should it be done 1 by 1 or can add all of them at once and let it rebalance? My concern is that if add all in one due to host based EC code it will block all the host. The other side if I add 1 by 1, one node will have more performance and more osds than the others which is also not a good setup, so wonder which is the safer way? (have 9 nodes with host based EC 4:2, 1 disk is going to have 4osds) Thank you ________________________________ 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. _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io _______________________________________________ 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.