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(a)gmail.com> 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(a)socket.net> 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
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