> > Thanks! Very good links! :) > > I need to subtract from the usable capacity max usable/server count to handle 1 server failure. Anything else I need to subtract? That buffer for server failure recovery is a good idea and often missed. These days though Ceph is pretty good at detecting that an entire node is down, and with a judicious mon_osd_down_out_subtree_limit one can usually avoid a thundering herd if the node can be brought back up within a short period of time. That said, it’s still good to have that margin in case it takes a long time. The backfillfull/full ratios can be squeezed higher in a pinch, but that can be risky. > > >> >> https://docs.clyso.com/tools/erasure-coding-calculator/ >> >> >> >> Am Sa., 16. Nov. 2024 um 10:04 Uhr schrieb Marc Schoechlin >> <ms@xxxxxxxxxx>: >> >>> Hi Anthony, >>> >>> this is a nice one! The original mail had a broken link :-) >>> https://www.osnexus.com/ceph-designer >>> Curious. Apple Mail has been weird on me lately. >>> Perhaps this would also be a good project to build an open platform >> that >>> helps to do a dteailed planning of Ceph clusters in general (server >> and >>> switch hardware, different types of pools, service distribution, >> placement >>> groups, ....). >>> Especially if it also had the option of using or creating hardware >>> profiles (that the user creates himself or that interested hardware >>> manufacturers can create) from different server and switch >> manufacturers >>> and comparing them in terms of costs, energy consumption, throughput >> and >>> usable memory. >>> >>> Regards >>> Marc >>> >>> Am 15.11.24 um 16:55 schrieb Anthony D'Atri: >>>> https://www.osnexus.com/ceph-designer; >>>> >>>>> On Nov 15, 2024, at 10:51 AM, Marc<Marc@xxxxxxxxxxxxxxxxx> wrote: >>>>> >>>>> >>>>> I was wondering if there is some online tool that can help you with >>> calculating usable storage from nodes, drives per node, >> replication/erasure >>> used etc. >>>>> >>>>> > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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