As Nathan describes, this information is maintained in the database on mon / monitor nodes. One always runs multiple mons in production, at least 3 and commonly 5. Each has a full copy of everything, so that the loss of a node does not lose data or impact operation. BTW, it’s Ceph not CEPH ;) > On Mar 12, 2021, at 8:17 AM, Nathan Fish <lordcirth@xxxxxxxxx> wrote: > > Every mon stores the crush map in /var/lib/ceph, I believe. > > On Fri, Mar 12, 2021 at 10:53 AM Ed Kalk <ekalk@xxxxxxxxxx> wrote: >> >> Hello, >> >> I have been googling for the answer to this and not found it. >> Does anyone know this? >> >> Where does CEPH store the crush map and the critical cluster metadata? >> What prevents a loss of this metadata when a node is lost? >> >> -- >> Thank you for your time, >> >> >> >> Edward H. Kalk IV >> Information Technology Dept. >> Server Specialist >> Datacenter Virtualization and Storage Systems >> Socket Telecom, LLC. >> 2703 Clark Lane >> Columbia, MO 65202 >> 573-817-0000 or 800-socket3 X218 >> _______________________________________________ >> 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 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |